作者:Tetsuji Kametani、Takayasu Nagahara、Yukio Suzuki、Shuichi Yokohama、Shyh-Pyng Huang、Masataka Ihara
DOI:10.1016/s0040-4020(01)97688-4
日期:1981.1
Synthesis of trans-3-(1'R*-hydroxyethyl)-4-(2',2'-dimethoxyethyl)-2-azetidinone (5), an important intermediate for the synthesis of thienamycin (1), was investigated starting from the isoxazoline derivatives 3 and 9. The most effective method was catalytic hydrogenation of trans-4-t-butoxycarbonyl-3-(2,2'-dimethoxyethyl)-5-methyl-isoxazoline (9) with Adams catalyst in acetic acid, followed by trimethylsilylation
从开始研究了反式-3-(1'R * -羟乙基)-4-(2',2'-二甲氧基乙基)-2-氮杂环丁酮(5)的合成,噻吩酮是合成噻吩霉素的重要中间体(1)。异唑啉衍生物3和9。最有效的方法是在乙酸中用Adams催化剂催化反式-4-叔丁氧羰基-3-(2,2'-二甲氧基乙基)-5-甲基-异恶唑啉(9)的加氢反应,然后对所得的差向异构氨基酯进行三甲基甲硅烷基化反应。11A和B,使用EtMgBr进行环化以及进行解块。还报道了用硼氢化钠和氯化镍或用乙硼烷新颖还原异恶唑啉,然后催化氢化。