Heterocyclic Building Blocks

Halogenated Heterocycles - (6108)
Fluorinated Heterocycles - (1377)
Acridines - (15)
Azaindoles - (270)
Azepanes/Diazepanes - (122)
Azetidines - (70)
Benzimidazoles - (332)
Benzodioxanes - (106)
Benzofurans - (189)
Benzopyrans - (181)
Benzothiophenes - (131)
Benzotriazoles - (20)
Benzoxazines - (49)
Carbazoles - (43)
Coumarins - (90)
Furans - (949)
Homopiperidines - (8)
Imidazoles - (522)
Imidazolines/Imidazolidines - (97)
Imidazopyridines - (23)

Indazoles - (108)
Indoles - (788)
Indolines - (107)
Isothiazoles - (18)
Isoquinolines - (78)
Isoxazoles - (460)
Morpholines/Thiomorpholines - (531)
Naphthyridines - (65)
Oxadiazoles - (296)
Oxazoles - (226)
Oxazolines/Oxazolidines - (59)
Oxetanes - (29)
Piperazines - (1057)
Piperidines - (1587)
Piperidones - (137)
Purines - (95)
Pyrans - (202)
Pyrazines - (218)
Pyrazoles - (1644)
Pyridazines - (106)

Pyridines - (4106)
Pyrimidines - (1091)
Pyrroles - (394)
Pyrrolidines - (976)
Pyrrolines - (28)
Quinaldines - (9)
Quinazolines - (113)
Quinolines - (955)
Quinoxalines - (82)
Quinuclidines - (16)
Tetrazoles - (129)
Thiadiazoles - (234)
Thiazines - (22)
Thiazoles - (1044)
Thiazolines/Thiazolidines - (31)
Thiophenes - (1005)
Triazines - (103)
Triazoles - (350)
Others - (347)

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Heterocyclic Building Blocks