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Heterocyclic Compounds

Heterocyclic compounds are a class of compounds that consist of carbon atoms and non-carbon atoms altogether forming a cyclic skeletal structure. These non-carbon atoms are collectively referred to as a heteroatom. The common heteroatoms include nitrogen, oxygen, and sulfur. Lactones, lactams, cyclic ethers that we’ve already learned are heterocyclic compounds. With similar properties of congeneric open-chain compounds, they will be discussed in corresponding chapters. This chapter will mainly discuss heterocyclic compounds with relatively stable ring system and with a certain degree of aromaticity, also known as aromatic heterocyclic compound.

There are many kinds and a large number of heterocyclic compounds widely distributed in nature. Many natural heterocyclic compounds in animals and plants play an important physiological role in the body. For example, heterocyclic structure exists in chlorophyll in plants, hemoglobin in animal blood, alkaloids and glycosides as the active ingredient in herbs, some antibiotics and vitamins, certain composition of amino acids in protein and bases in nucleotide. About half of the existing medicines have heterocyclic structures. Thus, heterocyclic compounds play an important role in organic compounds especially in organic medicines.

The most common and also the most important heterocyclic compounds are that with five-membered or six-membered heterocyclic ring and their fused heterocyclic compounds. Therefore, according to the size of the ring, heterocyclic compounds can be divided into five-membered compounds and six-membered heterocyclic compounds. E.g., furan, thiophene, pyrrole, imidazole, triazole and their fused heterocyclic compounds, indole, benzimidazole and diphenylene-oxide are all five-membered heterocyclic compounds, while pyridine, pyrimidine and their fused heterocyclic compounds, quinoline and quinazoline are all six-membered heterocyclic compounds.

According to the number of hetero atoms, five-membered compounds and six-membered heterocyclic compounds can be divided into one-hetero-atom-containing heterocyclic compounds and two-hetero-atom-containing and several-hetero-atom-containing heterocyclic compounds. E.g., furan, thiophene, pyridine, indole, quinoline, dibenzofuran, etc. are one-hetero-atom-containing heterocyclic compounds; imidazole, pyrimidine, benzimidazole, quinazoline, etc. are two-hetero-atom-containing heterocyclic compounds; purine, comprising more than two hetero atoms, is a several-hetero-atom-containing heterocyclic compound. According to the form of the ring in the molecule, heterocyclic compounds can be divided into single-heterocyclic compounds and fused heterocyclic compounds. E.g., furan, pyridine, pyrimidine, imidazole, etc. are single-heterocyclic compounds and indole, quinoline, dibenzofuran, purines, etc. are fused heterocyclic compounds.

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Structure Chemical Name CAS MF
2-bromo-4-(2-chlorophenyl)-6-(tert-butyl)pyrimidine 2-bromo-4-(2-chlorophenyl)-6-(tert-butyl)pyrimidine 1412954-83-6 C14H14BrClN2
2-bromo-4-(2-fluorophenyl)-6-(tert-butyl)pyrimidine 2-bromo-4-(2-fluorophenyl)-6-(tert-butyl)pyrimidine 1412955-10-2 C14H14BrFN2
2-bromo-4-(2-methylpiperidin-1-yl)-6-cyclopropylpyrimidine 2-bromo-4-(2-methylpiperidin-1-yl)-6-cyclopropylpyrimidine 1412961-89-7 C13H18BrN3
2-Bromo-4-(2-tolyl)-6-(iso-propyl)pyrimidine 2-Bromo-4-(2-tolyl)-6-(iso-propyl)pyrimidine 1412955-17-9 C14H15BrN2
2-bromo-4-(3-chlorophenyl)-6-(tert-butyl)pyrimidine 2-bromo-4-(3-chlorophenyl)-6-(tert-butyl)pyrimidine 1412954-93-8 C14H14BrClN2
2-Bromo-4-(3-furyl)-6-(iso-propyl)pyrimidine 2-Bromo-4-(3-furyl)-6-(iso-propyl)pyrimidine 1412959-02-4 C11H11BrN2O
2-bromo-4-(3-methylpiperidin-1-yl)-6-cyclopropylpyrimidine 2-bromo-4-(3-methylpiperidin-1-yl)-6-cyclopropylpyrimidine 1412957-38-0 C13H18BrN3
2-Bromo-4-(3-methylpiperidin-1-yl)pyrimidine 2-Bromo-4-(3-methylpiperidin-1-yl)pyrimidine 1314354-11-4 C10H14BrN3
2-Bromo-4-(3-trifluoromethylphenyl)thiophene 2-Bromo-4-(3-trifluoromethylphenyl)thiophene 1215071-96-7 C11H6BrF3S
2-Bromo-4-(4-chlorophenyl)-6-methylpyrimidine 2-Bromo-4-(4-chlorophenyl)-6-methylpyrimidine 1412954-68-7 C11H8BrClN2
2-Bromo-4-(5-pyrimidyl)-1,3,5-triazine 2-Bromo-4-(5-pyrimidyl)-1,3,5-triazine 1417519-65-3 C7H4BrN5
2-Bromo-4-(cyclohexyl)-1,3,5-triazine 2-Bromo-4-(cyclohexyl)-1,3,5-triazine 1417519-48-2 C9H12BrN3
2-Bromo-4-(cyclopentyl)pyrimidine 2-Bromo-4-(cyclopentyl)pyrimidine 1215071-34-3 C9H11BrN2
2-Bromo-4-(iso-propoxy)-6-(iso-propyl)pyrimidine 2-Bromo-4-(iso-propoxy)-6-(iso-propyl)pyrimidine 1412954-03-0 C10H15BrN2O
2-bromo-4-(iso-propyl)-6-(tert-butyl)pyrimidine 2-bromo-4-(iso-propyl)-6-(tert-butyl)pyrimidine 1412957-19-7 C11H17BrN2
2-bromo-4-(n-propyl)-6-cyclopropylpyrimidine 2-bromo-4-(n-propyl)-6-cyclopropylpyrimidine 1412959-65-9 C10H13BrN2
2-bromo-4-(piperidin-1-yl)-6-(tert-butyl)pyrimidine 2-bromo-4-(piperidin-1-yl)-6-(tert-butyl)pyrimidine 1412957-20-0 C13H20BrN3
2-bromo-4-(pyrimidin-5-yl)-6-cyclopropylpyrimidine 2-bromo-4-(pyrimidin-5-yl)-6-cyclopropylpyrimidine 1412958-90-7 C11H9BrN4
2-Bromo-4-(tetrahydropyran-4-yl)-6-methylpyrimidine 2-Bromo-4-(tetrahydropyran-4-yl)-6-methylpyrimidine 1412954-43-8 C10H13BrN2O
2-Bromo-4-chloro-5-(2-methoxyphenyl)pyridine 2-Bromo-4-chloro-5-(2-methoxyphenyl)pyridine 1381941-55-4 C12H9BrClNO
2-Bromo-4-chloro-5-(3-fluorophenyl)pyridine 2-Bromo-4-chloro-5-(3-fluorophenyl)pyridine 1381933-16-9 C11H6BrClFN
2-Bromo-4-chloro-5-(cyclopentyl)pyridine 2-Bromo-4-chloro-5-(cyclopentyl)pyridine 1381933-26-1 C10H11BrClN
2-Bromo-4-chloro-5-ethylpyridine 2-Bromo-4-chloro-5-ethylpyridine 1353855-45-4 C7H7BrClN
2-Bromo-5-(1H-pyrrol-1-yl)furan 2-Bromo-5-(1H-pyrrol-1-yl)furan 1367796-05-1 C8H6BrNO
2-Bromo-5-(iso-propyl)pyridine-4-boronic acid pinacol ester 2-Bromo-5-(iso-propyl)pyridine-4-boronic acid pinacol ester 1402233-24-2 C14H21BBrNO2
2-Bromo-5-(pyrrolidinon-1-yl)pyridine 2-Bromo-5-(pyrrolidinon-1-yl)pyridine 1209459-09-5 C9H9BrN2O
2-Bromo-6-(3-tetrahydrofuranyl)pyridine-4-boronic acid pinacol ester 2-Bromo-6-(3-tetrahydrofuranyl)pyridine-4-boronic acid pinacol ester 2223008-96-4 C15H21BBrNO3
2-Bromo-6-(iso-butyl)pyridine-4-boronic acid pinacol ester 2-Bromo-6-(iso-butyl)pyridine-4-boronic acid pinacol ester 2223035-81-0 C15H23BBrNO2
2-Chloro-3-(2-thienyl)pyridine 2-Chloro-3-(2-thienyl)pyridine 31557-59-2 C9H6ClNS
2-Chloro-3-(cyclopentoxy)pyridine 2-Chloro-3-(cyclopentoxy)pyridine 1394945-40-4 C10H12ClNO
2-Chloro-3-cyclopropyl-5-methoxyphenylboronic acid pinacol ester 2-Chloro-3-cyclopropyl-5-methoxyphenylboronic acid pinacol ester 2223043-09-0 C16H22BClO3
2-Chloro-3-methoxy-5-cyclopropylphenylboronic acid pinacol ester 2-Chloro-3-methoxy-5-cyclopropylphenylboronic acid pinacol ester 2223047-61-6 C16H22BClO3
2-chloro-4-(1H-3-methylpyrozol-1-yl)-6-cyclopropylpyrimidine 2-chloro-4-(1H-3-methylpyrozol-1-yl)-6-cyclopropylpyrimidine 1412953-82-2 C11H11ClN4
2-chloro-4-(1H-pyrozol-1-yl)-6-(tert-butyl)pyrimidine 2-chloro-4-(1H-pyrozol-1-yl)-6-(tert-butyl)pyrimidine 1412957-48-2 C11H13ClN4
2-Chloro-4-(1H-pyrrol-1-yl)-6-methylpyrimidine 2-Chloro-4-(1H-pyrrol-1-yl)-6-methylpyrimidine 1412960-58-7 C9H8ClN3
2-chloro-4-(2-furyl)-6-(tert-butyl)pyrimidine 2-chloro-4-(2-furyl)-6-(tert-butyl)pyrimidine 1412961-74-0 C12H13ClN2O
2-Chloro-4-(2-methyl-1H-imidazol-1-yl)-6-methylpyrimidine 2-Chloro-4-(2-methyl-1H-imidazol-1-yl)-6-methylpyrimidine 1249922-98-2 C9H9ClN4
2-chloro-4-(2-thienyl)-6-(tert-butyl)pyrimidine 2-chloro-4-(2-thienyl)-6-(tert-butyl)pyrimidine 1412954-70-1 C12H13ClN2S
2-chloro-4-(2-tolyl)-6-cyclopropylpyrimidine 2-chloro-4-(2-tolyl)-6-cyclopropylpyrimidine 1412955-81-7 C14H13ClN2
2-chloro-4-(2-trifluoromethylphenyl)-6-cyclopropylpyrimidine 2-chloro-4-(2-trifluoromethylphenyl)-6-cyclopropylpyrimidine 1412957-09-5 C14H10ClF3N2
2-Chloro-4-(3-methoxyphenyl)-1,3,5-triazine 2-Chloro-4-(3-methoxyphenyl)-1,3,5-triazine 1417518-78-5 C10H8ClN3O
2-chloro-4-(4-chlorophenyl)-6-(tert-butyl)pyrimidine 2-chloro-4-(4-chlorophenyl)-6-(tert-butyl)pyrimidine 1412953-02-6 C14H14Cl2N2
2-Chloro-4-(4-iso-propoxy)-1,3,5-triazine 2-Chloro-4-(4-iso-propoxy)-1,3,5-triazine 118839-98-8 C6H8ClN3O
2-Chloro-4-(n-propyl)-1,3,5-triazine 2-Chloro-4-(n-propyl)-1,3,5-triazine 1417519-19-7 C6H8ClN3
2-Chloro-4-(pyridin-3-yl)-6-methylpyrimidine 2-Chloro-4-(pyridin-3-yl)-6-methylpyrimidine 1412958-48-5 C10H8ClN3
2-Chloro-4-(pyrimidin-5-yl)-6-(iso-propyl)pyrimidine 2-Chloro-4-(pyrimidin-5-yl)-6-(iso-propyl)pyrimidine 1412953-66-2 C11H11ClN4
2-Chloro-4-(tert-butoxy)-6-methylpyrimidine 2-Chloro-4-(tert-butoxy)-6-methylpyrimidine 1251061-96-7 C9H13ClN2O
2-chloro-4-ethyl-6-(tert-butyl)pyrimidine 2-chloro-4-ethyl-6-(tert-butyl)pyrimidine 1412955-26-0 C10H15ClN2
2-chloro-4-phenyl-6-(tert-butyl)pyrimidine 2-chloro-4-phenyl-6-(tert-butyl)pyrimidine 1412956-47-8 C14H15ClN2
2-Chloro-6-(iso-butyl)pyridine-4-boronic acid pinacol ester 2-Chloro-6-(iso-butyl)pyridine-4-boronic acid pinacol ester 2223031-30-7 C15H23BClNO2
2-Chloro-6-(n-propyl)pyridine-4-boronic acid pinacol ester 2-Chloro-6-(n-propyl)pyridine-4-boronic acid pinacol ester 2223032-49-1 C14H21BClNO2
2-Cyano-6-(Oxolan-2-yl)pyridine-4-boronic acid pinacol ester 2-Cyano-6-(Oxolan-2-yl)pyridine-4-boronic acid pinacol ester 2223003-69-6 C16H21BN2O3
2-Cyano-6-ethylpyridine-4-boronic acid pinacol ester 2-Cyano-6-ethylpyridine-4-boronic acid pinacol ester 2223035-69-4 C14H19BN2O2
2-cyclobutyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2-cyclobutyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2223045-19-8 C13H20BNO2S
2-cyclobutyl-6-(tetrahydro-2H-pyran-4-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-cyclobutyl-6-(tetrahydro-2H-pyran-4-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223012-73-3 C20H30BNO3
2-cyclopropyl-4-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2-cyclopropyl-4-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2223052-34-2 C13H20BNO2S
2-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2096334-53-9 C11H18BNO2S
2-Ethyl-6-(oxan-4-yl)pyridine-4-boronic acid pinacol ester 2-Ethyl-6-(oxan-4-yl)pyridine-4-boronic acid pinacol ester 2223043-39-6 C18H28BNO3
2-Fluoro-3-bromo-4-cyclobutylpyridine 2-Fluoro-3-bromo-4-cyclobutylpyridine 1622843-66-6 C9H9BrFN
2-Fluoro-3-bromo-4-phenylpyridine 2-Fluoro-3-bromo-4-phenylpyridine 1622838-83-8 C11H7BrFN
2-Fluoro-6-(2-aminophenyl)pyridine 2-Fluoro-6-(2-aminophenyl)pyridine 1563530-33-5 C11H9FN2
2-Fluoro-6-(3-aminophenyl)pyridine 2-Fluoro-6-(3-aminophenyl)pyridine 1563531-76-9 C11H9FN2
2-Fluoro-6-(3-furyl)pyridine 2-Fluoro-6-(3-furyl)pyridine 1563529-95-2 C9H6FNO
2-Fluoro-6-(cyclopentyl)pyridine-3-boronic acid pinacol ester 2-Fluoro-6-(cyclopentyl)pyridine-3-boronic acid pinacol ester 2223011-86-5 C16H23BFNO2
2-Fluoro-6-(oxan-4-yl)pyridine 2-Fluoro-6-(oxan-4-yl)pyridine 1563532-04-6 C10H12FNO
2-fluoro-6-(tetrahydro-2H-pyran-2-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-fluoro-6-(tetrahydro-2H-pyran-2-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223004-07-5 C16H23BFNO3
2-fluoro-6-(tetrahydrofuran-2-yl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-fluoro-6-(tetrahydrofuran-2-yl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223006-77-5 C15H21BFNO3
2-Hydroxy-3-(2-furyl)pyridine 2-Hydroxy-3-(2-furyl)pyridine 30236-47-6 C9H7NO2
2-Hydroxy-3-(sec-butyl)pyridine 2-Hydroxy-3-(sec-butyl)pyridine 1417517-94-2 C9H13NO
2-hydroxy-4-(1H-imidazol-1-yl)-6-(tert-butyl)pyrimidine 2-hydroxy-4-(1H-imidazol-1-yl)-6-(tert-butyl)pyrimidine 1412961-01-3 C11H14N4O
2-Hydroxy-4-(1H-pyridin-2-one)-6-(tert-butyl)pyrimidine 2-Hydroxy-4-(1H-pyridin-2-one)-6-(tert-butyl)pyrimidine 1412955-60-2 C13H15N3O2
2-hydroxy-4-(2-fluorophenyl)-6-(tert-butyl)pyrimidine 2-hydroxy-4-(2-fluorophenyl)-6-(tert-butyl)pyrimidine 1412953-10-6 C14H15FN2O
2-hydroxy-4-(2-furyl)-6-(tert-butyl)pyrimidine 2-hydroxy-4-(2-furyl)-6-(tert-butyl)pyrimidine 1412958-11-2 C12H14N2O2
2-Hydroxy-4-(2-trifluoromethylphenyl)pyrimidine 2-Hydroxy-4-(2-trifluoromethylphenyl)pyrimidine 1159817-21-6 C11H7F3N2O
2-hydroxy-4-(3-methylpiperidin-1-yl)-6-(tert-butyl)pyrimidine 2-hydroxy-4-(3-methylpiperidin-1-yl)-6-(tert-butyl)pyrimidine 1412955-77-1 C14H23N3O
2-hydroxy-4-(3-thienyl)-6-cyclopropylpyrimidine 2-hydroxy-4-(3-thienyl)-6-cyclopropylpyrimidine 1412961-52-4 C11H10N2OS
2-hydroxy-4-(4-tetrahydropyranyl)-6-(tert-butyl)pyrimidine 2-hydroxy-4-(4-tetrahydropyranyl)-6-(tert-butyl)pyrimidine 1412960-67-8 C13H20N2O2
2-hydroxy-4-(cyclobutyl)-6-cyclopropylpyrimidine 2-hydroxy-4-(cyclobutyl)-6-cyclopropylpyrimidine 1412959-75-1 C11H14N2O
2-hydroxy-4-(n-propyl)-6-(tert-butyl)pyrimidine 2-hydroxy-4-(n-propyl)-6-(tert-butyl)pyrimidine 1412953-68-4 C11H18N2O
2-hydroxy-4-(piperidin-1-yl)-6-cyclopropylpyrimidine 2-hydroxy-4-(piperidin-1-yl)-6-cyclopropylpyrimidine 1412958-72-5 C12H17N3O
2-hydroxy-4-(pyrimidin-5-yl)-6-cyclopropylpyrimidine 2-hydroxy-4-(pyrimidin-5-yl)-6-cyclopropylpyrimidine 1412958-58-7 C11H10N4O
2-hydroxy-4-(pyrrolidin-1-yl)-6-cyclopropylpyrimidine 2-hydroxy-4-(pyrrolidin-1-yl)-6-cyclopropylpyrimidine 1412960-14-5 C11H15N3O
2-Hydroxy-4-ethyl-6-(iso-propyl)pyrimidine 2-Hydroxy-4-ethyl-6-(iso-propyl)pyrimidine 1412953-17-3 C9H14N2O
2-hydroxy-4-morpholino-6-(tert-butyl)pyrimidine 2-hydroxy-4-morpholino-6-(tert-butyl)pyrimidine 1412959-47-7 C12H19N3O2
2-Iodo-6-(methoxycarbonyl)pyridine-4-boronic acid pinacol ester 2-Iodo-6-(methoxycarbonyl)pyridine-4-boronic acid pinacol ester 2223041-08-3 C13H17BINO4
2-isobutyl-6-(tetrahydrofuran-3-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-isobutyl-6-(tetrahydrofuran-3-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223009-08-1 C19H30BNO3
2-Methoxy-4-(1H-pyridin-2-one)phenylboronic acid pinacol ester 2-Methoxy-4-(1H-pyridin-2-one)phenylboronic acid pinacol ester 2223033-65-4 C18H22BNO4
2-Methyl-5-cyanopyridine-3-boronic acid pinacol ester 2-Methyl-5-cyanopyridine-3-boronic acid pinacol ester 2223012-08-4 C13H17BN2O2
2-methyl-6-(tetrahydro-2H-pyran-4-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-methyl-6-(tetrahydro-2H-pyran-4-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223048-63-1 C17H26BNO3
2-propyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine 2-propyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine 2223049-08-7 C13H21BN2O2
2-Trifluoromethyl-4-(1H-pyridin-2-one)phenylboronic acid pinacol ester 2-Trifluoromethyl-4-(1H-pyridin-2-one)phenylboronic acid pinacol ester 2223031-38-5 C18H19BF3NO3
3-(1,4-Dioxan-2-yl)pyridine-2-boronic acid pinacol ester 3-(1,4-Dioxan-2-yl)pyridine-2-boronic acid pinacol ester 2223004-58-6 C15H22BNO4
3-(2-(methyl-d3)propyl-1,1,2,3,3,3-d6)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 3-(2-(methyl-d3)propyl-1,1,2,3,3,3-d6)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2241875-31-8 C15H24BNO2
3-(6-Bromo-2-pyridinyl)-3-Piperidinol 3-(6-Bromo-2-pyridinyl)-3-Piperidinol 1367018-30-1 C10H13BrN2O
3-(Cyclobutyl)pyridine-2-boronic acid pinacol ester 3-(Cyclobutyl)pyridine-2-boronic acid pinacol ester 2223012-94-8 C15H22BNO2
3-(Cyclohexyl)pyridine-2-boronic acid pinacol ester 3-(Cyclohexyl)pyridine-2-boronic acid pinacol ester 2223046-95-3 C17H26BNO2
3-(iso-Propoxy)pyridine-2-boronic acid pinacol ester 3-(iso-Propoxy)pyridine-2-boronic acid pinacol ester 2223052-11-5 C14H22BNO3
3-(pyrrolidin-1-yl-d8)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 3-(pyrrolidin-1-yl-d8)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2241875-28-3 C15H23BN2O2
3-(sec-butyl)-2-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 3-(sec-butyl)-2-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223004-28-0 C15H23BClNO2
3-(tetrahydro-2H-pyran-4-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 3-(tetrahydro-2H-pyran-4-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 2223045-91-6 C17H23BF3NO3
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