Studies on Heterocyclic Compounds. XIII. Reaction of 2-Amino-benzazoles with Acetylenic Compounds
作者:HARUO OGURA、MITSUO KAWANO、TSUNEO ITOH
DOI:10.1248/cpb.21.2019
日期:——
Reaction of 2-aminobenzazoles such as 2-amino-benzothiazole, -benzoxazole, and-benzimidazole with acetylene compounds was reported comparing with the condensation product of these benzazoles and ethoxy methylenemalonate. In the former case, 2-oxo compounds were obtained while 4-oxo compounds were the product in the latter condensation. The structure of these products was confirmed from nuclear magnetic resonance and mass spectra.
报道了2-氨基苯并噻唑、2-氨基苯并噻唑、2-苯并恶唑和-苯并咪唑等2-氨基苯并唑与乙炔化合物的反应,并与这些苯并唑和乙氧基亚甲基丙二酸酯的缩合产物进行比较。在前一种情况下,得到2-氧代化合物,而4-氧代化合物是后一缩合中的产物。这些产物的结构通过核磁共振和质谱得到证实。