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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成される環(huán)狀構造の化合物である。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)式化合物は動物、植物の體內(nèi)で重要な生理學的作用を果たす。例えば：植物內(nèi)のクロロフィル、動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、一部の抗生物質とビタミン、タンパク質のあるアミノ酸とヌクレオチドを構成する塩基等はいずれも複素環(huán)構造を含有する。従來の薬物中で、複素環(huán)構造を含有するものは約半分を占める。そのため，複素環(huán)式化合物は有機化合物（特に有機薬物）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
1-ethyl-5-isopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole	2460671-71-8	C13H24BN3O2
3,5-dibromo-2-(pyrrolidin-1-yl)pyridine	1259313-59-1	C9H10Br2N2
4-(3-cyclopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)pyrimidine	2460672-81-3	C19H23BN2O2
2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-imidazol-1-yl)pyrimidine	2223012-53-9	C13H17BN4O2
4-fluoro-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5-(trifluoromethyl)pyridine	2710289-79-3	C12H14BF4NO2
3-(6-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)benzonitrile	2710289-87-3	C18H18BFN2O2
3-(3-bromo-1H-1,2,4-triazol-5-yl)pyridine	1219571-83-1	C7H5BrN4
(2-methyl-6-(tetrahydrofuran-3-yl)pyridin-3-yl)boronic acid	2710290-22-3	C10H14BNO3
6-ethyl-2,4-difluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2710293-68-6	C13H18BF2NO2
2-(2-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-imidazol-1-yl)pyrimidine	2223037-81-6	C14H19BN4O2
6-cyclobutyl-2,4-difluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2710293-73-3	C15H20BF2NO2
1-(4-methoxybenzyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole	2710293-89-1
3-((tetrahydrofuran-2-yl)methoxy)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2710294-10-1	C16H24BNO4
5-((tetrahydro-2H-pyran-2-yl)methoxy)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2710294-21-4	C17H26BNO4
1-CYCLOBUTYL-4-(TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)-1H-1,2,3-TRIAZOLE	2223030-61-1	C12H20BN3O2
2-(3-methylbicyclo[1.1.1]pentan-1-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole	2710295-84-2	C15H22BNO2S
4-Chloro-2-ethylpyrimidine-5-boronic acid pinacol ester	2223037-76-9	C12H18BClN2O2
2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)oxazole	2710296-12-9	C14H17BN2O3
5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(3-thienyl)pyridine	1402240-67-8	C15H18BNO2S
3-Bromo-5-cyclopropyl-4-methoxypyridine	2460491-96-5
TERT-BUTYL4-(2-AMINOPYRIDIN-3-YL)PIPERIDINE-1-CARBOXYLATE	1245914-95-7	C15H23N3O2
4-Chloro-2-(diethylamino)pyrimidine-5-boronic acid pinacol ester	2223037-77-0	C14H23BClN3O2
4-Chloro-2-(3-methylpiperidin-1-yl)pyrimidine-5-boronic acid pinacol ester	2223006-83-3	C16H25BClN3O2
6-Bromo-6'-cyano-2,2'-bipyridine	1185315-61-0	C11H6BrN3
6-Bromo-3'-hydroxy-2,2'-bipyridine	1185310-80-8	C10H7BrN2O
6-Amino-2-(6'-bromo-2'-pyridyl)pyrazine	1185308-01-3	C9H7BrN4
2-Hydroxy-4-(6'-bromo-2'-pyridyl)pyrimidine	1185315-65-4	C9H6BrN3O
2-Amino-4-methyl-6-(6'-bromo-2'-pyridyl)pyrimidine	1185312-75-7
3-(Pyrimidin-2-yl)phenylboronic acid	2225171-99-1	C10H9BN2O2
2-(methyl-d3)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine	2241870-24-4	C11H14BD3N2O2
3,5-Dibromo-2-(imidazol-1-yl)pyridine	1289111-36-9	C8H5Br2N3
6-Chloro-2-(6'-methoxycarbonyl-2'-pyridyl)pyrazine	1185319-50-9	C11H8ClN3O2
4-Amino-2-(6'-chloro-2'-pyrazinyl)pyrimidine	1185310-58-0	C8H6ClN5
6,6'-Dichloro-2-methylthio-4-(2'-pyrazinyl)pyrimidine	1185315-48-3	C9H6Cl2N4S
5-Bromo-6'-cyano-2,2'-bipyridine	1185316-38-4	C11H6BrN3
5-Aminomethyl-6'-cyano-2,2'-bipyridine	1185311-38-9	C12H10N4
6-Amino-2-(6'-cyano-2'-pyridyl)pyrazine	1185313-48-7	C10H7N5
2-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)oxazole	2710297-53-1	C10H16BNO4
2-(pyrimidin-4-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)oxazole	2710297-60-0	C13H16BN3O3
1-isobutyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole	2710298-13-6	C12H22BN3O2
2-cyclopentyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole	2710298-58-9	C13H22BN3O2
2-(2-methoxyphenyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole	2710298-72-7	C15H20BN3O3
3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazol-2-yl)pyridine	2710298-76-1	C13H17BN4O2
6-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine
6-(tetrahydrofuran-2-yl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine
6-(tetrahydro-2H-pyran-4-yl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine
3-(tetrahydro-2H-pyran-4-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine
tert-butyl 5-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-4H-1,4-oxazine-4-carboxylate
tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)morpholine-4-carboxylate
4-isopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-1,4-oxazine
4-methyl-2-(tetrahydrofuran-3-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole
1-cyclopropyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,4-tetrahydropyridine
tert-butyl 2-oxo-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-1(2H)-carboxylate
tert-butyl 2,3-dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-4H-1,4-oxazine-4-carboxylate
5-Bromo-2-(6'-cyano-2'-pyridyl)pyrazine	1185309-55-0	C10H5BrN4
2-Bromo-4-(6'-cyano-2'-pyridyl)pyrimidine	1185312-63-3	C10H5BrN4
6-Methoxycarbonyl-5'-cyano-2,2'-bipyridine	1185318-47-1	C13H9N3O2
5-Hydroxymethyl-5'-cyano-2,2'-bipyridine	1185309-47-0	C12H9N3O
6-Hydroxy-2-(5'-cyano-2'-pyridyl)pyrazine	1185318-66-4	C10H6N4O
5,5'-Dicyano-2-(2'-pyridyl)pyrazine	1185307-31-6	C11H5N5
6-Chloro-4-(5'-cyano-2'-pyridyl)pyrimidine	1185314-30-0	C10H5ClN4
6-Chloro-2-methyl-4-(5'-cyano-2'-pyridyl)pyrimidine	1185310-95-5	C11H7ClN4
5-Bromo-4-amino-2-(cyclopentyl)pyrimidine	1381935-28-9
5-Bromo-4-amino-2-(3-thienyl)pyrimidine	1381935-92-7	C8H6BrN3S
5-Bromo-4-(2-methoxyphenyl)thiazole	1243839-16-8	C10H8BrNOS
5-Amino-4-(4-methoxyphenyl)thiazole	1250287-58-1	C10H10N2OS
5-Bromo-4-(2-methoxyphenyl)-2-aminothiazole	1243839-34-0	C10H9BrN2OS
4-Bromo-5-(4-tolyl)thiazole	1264038-38-1	C10H8BrNS
4-Bromo-5-(3-methoxyphenyl)thiazole	1264036-62-5	C10H8BrNOS
4-Amino-5-(4-trifluoromethylphenyl)thiazole	1374665-73-2	C10H7F3N2S
2-Bromo-4-(3-tetrahydrofuranyl)thiophene	1353854-99-5	C8H9BrOS
2-Bromo-4-(tetrahydrothiophen-3-yl)pyridine	1353854-60-0	C9H10BrNS
4-Bromo-5-(2-thienyl)thiazole	1367937-46-9	C7H4BrNS2
5-Bromo-4-(5-pyrimidyl)thiazole	1374664-39-7	C7H4BrN3S
5-Bromo-4-(3-thienyl)thiazole	1374665-80-1	C7H4BrNS2
5-Bromo-4-(3,5-difluorophenyl)thiazole	1374664-53-5	C9H4BrF2NS
tert-butyl 3-(4-bromo-6-methoxypyridin-2-yl)piperidine-1-carboxylate	2768655-26-9	C16H23BrN2O3
4-bromo-5-chloro-2-(methoxy-d3)pyridine-3,6-d2	2891512-02-8	C6BrClD5NO
2-(methoxy-d3)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-(trifluoromethyl)pyridine	2368221-63-8	C13H14BD3F3NO3
2-bromo-3-(methoxy-d3)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-4,6-d2	2368221-75-2	C12H12BBrD5NO3
3-fluoro-2-(methyl-d3)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-4,6-d2	2368221-81-0	C12H12BD5FNO2
3-(methoxy-d3)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine-4,6-d2	2304817-46-5	C13H12BD5F3NO3
2-(pyrrolidin-1-yl-d8)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine	2368222-25-5	C14H14BD8N3O2
2-(azetidin-1-yl-d6)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine-4,6-d2	2368223-01-0	C13H12BD8N3O2
5-(3-(methoxy-d3)azetidin-1-yl-2,2,3,4,4-d5)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2364585-99-7	C15H15BD8N2O3
2-(3-(methoxy-d3)azetidin-1-yl-2,2,3,4,4-d5)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine-4,6-d2	2368223-21-4	C14H12BD10N3O3
2-Amino-6-(pyrrolidin-2-yl)pyridine	1270472-98-4	C9H13N3
3-methyl-5-piperidin-3-ylpyridine	1260867-90-0	C11H16N2
6-(pyrrolidin-2-yl)pyridin-2-ol	1270515-17-7	C9H12N2O
3-(pyrrolidin-3-yl)-5-(trifluoromethyl)pyridine	1225218-24-5	C10H11F3N2
2-Bromo-4-(tetrahydrofuran-2-yl)pyridine	1353856-70-8	C9H10BrNO
2,4-dichloropyridine-3,5,6-d3	1001003-91-3	C5H3Cl2N
2-methoxy-3-(tetrahydro-2H-pyran-4-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2304818-01-5	C17H26BNO4
3-cyclopentyl-2-methoxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	2304817-02-3	C17H26BNO3
6,6'-dichloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2'-bipyridine	2304817-09-0	C16H17BCl2N2O2
2-(azetidin-1-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine	1352817-27-6	C14H21BN2O2
5-cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole	2364586-66-1	C11H18BN3O2
(2-fluoro-6-(methoxy-d3)pyridin-3-yl-4,5-d2)boronic acid	2368221-18-3	C6H2BD5FNO3
(2-(methoxy-d3)-6-(methyl-d3)pyridin-4-yl-3,5-d2)boronic acid	2368221-23-0	C7H2BD8NO3
(5-fluoropyridin-3-yl-4,6-d2)boronic acid