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複素環(huán)式化合物

複素環(huán)式化合物は炭素原子と非炭素原子により構(gòu)成される環(huán)狀構(gòu)造の化合物である。これらの非炭素原子はヘテロ原子と総稱され，一般的なヘテロ原子は窒素、酸素、硫黃等である。前述したラクトン、ラクタム、環(huán)狀エーテル等の化合物はいずれも複素環(huán)式化合物であり，しかしこれらの化合物の性質(zhì)は同じ種類の鎖式化合物と類似するため，いずれも対応する章節(jié)に組み込んで説明する。本章は主に環(huán)構(gòu)造が穏やかで、ある程度の芳香族性を有する複素環(huán)式化合物，即ち芳香族複素環(huán)式化合物を説明する。複素環(huán)式化合物は種類が膨大であり，數(shù)量が多く，自然界に広く分布しており，多くの天然の複素環(huán)式化合物は動(dòng)物、植物の體內(nèi)で重要な生理學(xué)的作用を果たす。例えば：植物內(nèi)のクロロフィル、動(dòng)物の血中ヘモグロビン、漢方薬中の有効成分のアルカロイドと一部の配糖體、一部の抗生物質(zhì)とビタミン、タンパク質(zhì)のあるアミノ酸とヌクレオチドを構(gòu)成する塩基等はいずれも複素環(huán)構(gòu)造を含有する。従來(lái)の薬物中で、複素環(huán)構(gòu)造を含有するものは約半分を占める。そのため，複素環(huán)式化合物は有機(jī)化合物（特に有機(jī)薬物）中で重要な地位を占める。複素環(huán)式化合物中で五員、六員複素環(huán)及びそれらの縮合複素環(huán)化合物は最も普及しており，かつ最も重要である。そのため環(huán)のサイズによって，複素環(huán)式化合物は五員複素環(huán)及び六員複素環(huán)という二つの種類に分けられる。例えば上記フラン、チオフェン、ピロール、オキサゾール、イミダゾール及びそれらの縮合複素環(huán)化合物のインドール、ベンゾイミダゾール、ジベンゾフラン等はいずれも五員複素環(huán)式化合物であり，それに対してピリジン、ピリミジン及びそれらの縮合複素環(huán)化合物のキノリン、キナゾリン等はいずれも六員複素環(huán)式化合物である。各五員複素環(huán)式化合物と六員複素環(huán)式化合物中で，環(huán)構(gòu)造中のヘテロ原子の數(shù)量によって，また一つのヘテロ原子を含有する複素環(huán)及び二つ又はそれ以上のヘテロ原子を含有する複素環(huán)に分けられる。例えばフラン、チオフェン、ピリジン、インドール、キノリン、ジベンゾフラン等は一つのヘテロ原子を含有する複素環(huán)式化合物である；イミダゾール、ピリミジン、ベンゾイミダゾール、キナゾリン等は二つのヘテロ原子を含有する複素環(huán)式化合物である；それに対してプリンは二つ以上のヘテロ原子を含有するため，即ち複數(shù)のヘテロ原子を含有する複素環(huán)式化合物である。分子中の環(huán)構(gòu)造の形式によって，複素環(huán)式化合物はさらに複素単環(huán)及び縮合複素環(huán)という二つの種類に分けられる。例えばフラン、ピリジン、ピリミジン、イミダゾール等はいずれも複素単環(huán)式化合物であり，インドール、キノリン、ジベンゾフラン、プリン等は縮合複素環(huán)式化合物である。

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Chemical Name	CAS	MF
2,6-dibromo-4-cyclopropylpyridin-3-amine	2561547-96-2	C8H8Br2N2
3-Bromo-2-methyl-6-phenylpyridine	2097188-94-6	C12H10BrN
2-(2-ethylthiophen-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane	2364586-64-9	C12H19BO2S
2-(4-Bromo-1H-pyrazol-1-yl)pyridine-5-boronic acid pinacol ester	1402233-72-0	C14H17BBrN3O2
2,5-Dibromo-4-(3-pyridyl)thiazole	1357580-17-6	C8H4Br2N2S
2-(4-methylphenyl)pyridin-3-ol	36739-30-7	C12H11NO
B-[2-Methyl-6-(2-thienyl)-3-pyridinyl]boronic acid	2710290-29-0	C10H10BNO2S
2-[4-BROMO-2-(TRIFLUOROMETHYL)PHENYL]PYRROLIDINE	1391332-02-7	C11H11BrF3N
2-methyl-5-(piperidin-3-yl)pyridine	1260755-78-9	C11H16N2
3-(3-Tetrahydrofuranyl)bromobenzene	1353856-68-4	C10H11BrO
5-Bromo-4-p-tolylthiazol-2-amine	98946-85-1	C10H9BrN2S
Morpholine,2-(1H-pyrrol-3-yl)-	1368812-15-0	C8H12N2O
1-(5-bromothiazol-2-yl)azetidin-3-ol	1849282-81-0	C6H7BrN2OS
2-tert-butoxy-4,6-dichloropyrimidine	1289269-99-3	C8H10Cl2N2O
4,5-Dibromo-2,6-dimethyl-pyrimidine	1849223-11-5	C6H6Br2N2
5-bromo-2-(1,4-dioxane-2-yl)thiazole	1451260-71-1	C7H8BrNO2S
3-(3-Tetrahydrofuranyl)phenol	1353853-47-0	C10H12O2
B-[2-Methyl-6-(3-thienyl)-3-pyridinyl]boronic acid	2710290-31-4	C10H10BNO2S
2-(methyl-d2)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-3,4,6-d3	2819702-30-0	C12H18BNO2
3-(methyl-d2)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-2,4,6-d3	2819702-48-0	C12H18BNO2
2-(methyl-d2)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2819702-62-8
3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine-4,5,6-d3	2819703-05-2	C12H15BF3NO2
tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)piperidine-1-carboxylate-2,2,3,4,4,5,5,6,6-d9	2819703-17-6	C21H33BN2O4
4-methoxy-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole	2819706-00-6	C11H18BNO3S
1-(methyl-d3)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one-3,5,6-d3	2819705-08-1	C12H18BNO3
5-isopropyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)quinoxaline	2819706-55-1	C17H23BN2O2
2-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)tetrahydro-4H-pyran-4-one	2819707-05-4	C16H22BNO4
3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)tetrahydro-4H-pyran-4-one	2819707-20-3	C16H22BNO4
3-isopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridazine	2819707-25-8	C13H21BN2O2
1-(difluoromethyl-d)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one-3,4,6-d3	2819705-25-2	C12H16BF2NO3
5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3,4,6-d3-2-amine	2819702-23-1
5-(methyl-d2)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2819702-40-2	C12H18BNO2
5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine-3,4,6-d3	2819702-85-5	C12H15BF3NO2
2-(methyl-d3)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2819702-98-0	C12H18BNO2
tert-butyl 3-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl-2,4,6-d3)piperidine-1-carboxylate	2819703-34-7	C21H33BN2O4
tert-butyl 3-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl-2,4,6-d3)piperidine-1-carboxylate-2,2,3,4,4,5,5,6,6-d9	2819703-47-2	C21H33BN2O4
3-Acetyl-6-(methyl-d3)-pyridine	1185314-07-1	C8H6D3NO
2-(ethyl-d5)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2241875-51-2	C13H15BD5NO2
3-(N-Methylpiperazin-1-yl)pyridine-4-boronic acid pinacol ester	2223044-74-2	C16H26BN3O2
2,4-dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxabor olan-2-yl)-2H-1,2,3-triazole	2796330-79-3	C10H18BN3O2
3-Bromo-2-(difluoromethyl)-5-methylpyridine	1806002-52-7	C7H6BrF2N
1-(2-Fluoro-4-pyridyl)-1H-pyrazole-4-boronic acid pinacol ester	1402166-14-6	C14H17BFN3O2
2-Bromo-4-(2-methoxyethoxy)pyridine	2384316-84-9	C8H10BrNO2
1-(3-Bromo-4-pyridyl)pyrazole-4-boronic acid pinacol ester	1402233-79-7	C14H17BBrN3O2
3,5-Dibromo-2-(cyclohexyloxy)pyridine	1289110-80-0	C11H13Br2NO
4-Cyclohexyl-2-fluoropyridine	2242760-86-5	C11H14FN
3-Cyclopropyl-5-methyl-4H-[1,2,4]triazole	1152889-82-1	C6H9N3
4-chloro-2-(difluoromethyl)-6-methylpyridine	1805008-20-1	C7H6ClF2N
4-bromo-1-cyclopropyl-5-isopropyl-1H-1,2,3-triazole	2460501-41-9	C8H12BrN3
2-chloro-4-methylpyrido[2,3-d]pyrimidine	2891520-39-9	C8H6ClN3
3-(azetidin-1-yl)-5-bromopyridine	1257431-55-2	C8H9BrN2
4-chloro-2-(2-(trifluoroMethyl)phenyl)pyriMidine	1155598-43-8	C11H6ClF3N2
5-bromo-2-(tetrahydrofuran-2-yl)thiazole	1451260-66-4	C7H8BrNOS
4-bromo-3-iodopyridin-2-ol	2294947-91-2	C5H3BrINO
2-ethyl-3-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine
6-(2-Amino-5-pyrimidyl)pyrazine-2-boronic acid pinacol ester	1402172-74-0	C14H18BN5O2
4-(4-tert-Butylphenyl)pyridine-2-boronic acid pinacol ester	2223048-52-8	C21H28BNO2
4-Amino-2-(iso-butyl)pyrimidine-5-boronic acid pinacol ester	2223043-41-0	C14H24BN3O2
2-Amino-4-(pyrimidin-5-yl)pyrimidine-5-boronic acid pinacol ester	2223036-97-1	C14H18BN5O2
4-(oxetan-3-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2223045-73-4	C14H20BNO3
tert-butyl 3-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophen-2-yl)azetidine-1-carboxylate	2223043-62-5	C18H28BNO4S
6-(oxetan-3-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine	2223053-28-7	C14H21BN2O3
tert-butyl 2-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-yl)pyrrolidine-1-carboxylate	1350543-48-4	C19H30BN3O4
tert-butyl 2-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophen-2-yl)morpholine-4-carboxylate	2223005-25-0	C19H30BNO5S
tert-butyl 2-(6-cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)morpholine-4-carboxylate	2223004-54-2	C23H35BN2O5
2-(2-cyclopropyl-4-(tetrahydrofuran-2-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane	2223006-55-9	C19H27BO3
2-(5-Pyrimidyl)thiazole-5-boronic acid pinacol ester	1402166-20-4	C13H16BN3O2S
2-chloro-4,6-difluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine	2819706-51-7	C10H12BClF2N2O2
methyl 8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)quinoxaline-5-carboxylate	2819706-62-0	C16H19BN2O4
3-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-4-yl)tetrahydro-4H-pyran-4-one	2819707-17-8	C16H22BNO4
4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridazine-3,5,6-d3	2819705-21-8	C10H15BN2O2
4-(5-bromo-4-chloropyrimidin-2-yl)morpholine	796881-20-4	C8H9BrClN3O
2-(THIAZOL-2-YL)PYRIDINE-3-BORONIC ACID PINACOL ESTER	2223055-51-2	C14H17BN2O2S
4-Amino-2-(pyrimidin-5-yl)pyrimidine-5-boronic acid pinacol ester	2223036-91-5
2-Amino-4-(2-thienyl)pyrimidine-5-boronic acid pinacol ester	2223035-60-5	C14H18BN3O2S
2-Amino-4-(thiazol-4-yl)pyrimidine-5-boronic acid pinacol ester	2223048-96-0	C13H17BN4O2S
2-(oxetan-3-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole	2223011-75-2	C12H18BNO3S
4,4,5,5-tetramethyl-2-(5-(oxetan-3-yl)furan-2-yl)-1,3,2-dioxaborolane	2223049-07-6	C13H19BO4
4,4,5,5-tetramethyl-2-(5-(oxetan-3-yl)thiophen-3-yl)-1,3,2-dioxaborolane	2223035-85-4	C13H19BO3S
tert-butyl 2-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)furan-2-yl)pyrrolidine-1-carboxylate	2223009-45-6	C19H30BNO5
tert-butyl 2-(6-chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)morpholine-4-carboxylate	2223002-95-5	C20H30BClN2O5
tert-butyl 2-(2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)morpholine-4-carboxylate	2222997-69-3	C22H34BNO5
2-(5-cyclopropyl-2-(tetrahydrofuran-2-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane	2222996-98-5	C19H27BO3
tert-butyl 3-(4-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)azetidine-1-carboxylate	2256709-06-3	C19H28BFN2O4
tert-butyl 3-(4-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)pyrrolidine-1-carboxylate	2256709-11-0	C20H30BFN2O4
2-Fluoro-4-(tetrahydro-2H-pyran-4-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2223012-91-5	C16H23BFNO3
tert-Butyl 2-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-(trifluoromethyl)pyridin-4-yl)morpholine-4-carboxylate	2223005-34-1	C21H30BF3N2O5
4-Isopropyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-(trifluoromethyl)pyridine	2223042-03-1	C15H21BF3NO2
4-(4-Bromo-1H-pyrazol-1-yl)pyridine-2-boronic acid pinacol ester	1402233-75-3	C14H17BBrN3O2
1-(2-Amino-4-pyridyl)imidazole-4-boronic acid pinacol ester	1402240-45-2	C14H19BN4O2
1-(6-Chloro-3-pyridyl)-1H-pyrazole-3-boronic acid pinacol ester	2223048-65-3	C14H17BClN3O2
1-(5-Bromo-3-pyridyl)-1H-pyrazole-3-boronic acid pinacol ester	2223047-62-7	C14H17BBrN3O2
1-(2,3-Dibromo-4-pyridyl)pyrazole-4-boronic acid pinacol ester	1402238-16-7	C14H16BBr2N3O2
4-Chloro-2-(4-tetrahydropyranyl)pyrimidine-5-boronic acid pinacol ester	2223030-59-7	C15H22BClN2O3
4-Chloro-2-(cyclopentoxy)pyrimidine-5-boronic acid pinacol ester	2223029-87-4	C15H22BClN2O3
4-Chloro-2-(4-methylimidazol-1-yl)pyrimidine-5-boronic acid pinacol ester	2223037-82-7	C14H18BClN4O2
6-(4-Bromo-1H-pyrazol-1-yl)pyridine-2-boronic acid pinacol ester	2223044-09-3	C14H17BBrN3O2
6-Bromo-5'-cyano-2,2'-bipyridine	1185312-28-0	C11H6BrN3
6-Bromo-4'-cyano-2,2'-bipyridine	1185315-45-0	C11H6BrN3
2-Cyano-5-(6'-bromo-2'-pyridyl)pyrazine	1185310-96-6	C10H5BrN4