名称:
A Novel syntjesis of 4-Methyl-, 4-Oxo-, and 4-Amino-3-(3-methyl-5-isoxazolyl)pyridine Derivatives via N-Silyl-1-aza-allyl-Anion
摘要:
An N-silyl-1-aza-allyl anion (1) reacted with alkoxyalkenes (3a) - (3e) to afford the corresponding 4-methylpyridines (4a) and (4b), 4-pyridones (5c) and (5d), and 4-aminopyridine (4e), possessing a 3-methyl-5-isoxazolyl group on C-3 atom, in 91, 90, 62, 27, and 68% yields, respectively, whereas alkoxyalkenes (3f) and (3g) gave the corresponding N-adduct intermediates (6f) and (6g) in 46 and 60% yields.