Synthesis of 2-(heteroarylthiomethyl)-1.BETA.-methylcarbapenem via propargylation of 4-acetoxy-2-azetidinone with 3-methyl-1-tributylstannylallene.
作者:Jun-ichi HARUTA、Koichi NISHI、Kazumi KIKUCHI、Satoshi MATSUDA、Yasumitsu TAMURA、Yasuyuki KITA
DOI:10.1248/cpb.37.2338
日期:——
The key intermediate in the synthesis of 1β-methylcarbapenem, (3S, 4R)-3-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-[(1S)-1-methyl-2-propynyl]-2-azetidinone (5β), was prepared by propargylation of (3R, 4R)-4-acetoxy-3-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-2-azetidinone (3) with 3-methyl-1-tributylstannylallene (4) in the presence of a Lewis acid and successfully converted to a novel 2-(heteroarylthiomethyl)-1β-methylcarbapenem (2).
合成1β-甲基碳青霉烯的关键中间体,(3S,4R)-3-[(1R)-1-(叔丁基二甲基硅氧基)乙基]-4-[(1S)-1-甲基-2-丙炔基]- 2-氮杂环丁酮 (5β) 是通过 (3R, 4R)-4-乙酰氧基-3-[(1R)-1-(叔丁基二甲基硅氧基)乙基]-2-氮杂环丁酮 (3) 与 3-甲基- 1-三丁基甲锡联烯 (4) 在路易斯酸存在下成功转化为新型 2-(杂芳基硫甲基)-1β-甲基碳青霉烯 (2)。