作者:D.Ivor John、Nicholas D. Tyrrell、Eric J. Thomas
DOI:10.1016/s0040-4020(01)92141-6
日期:1983.1
6β-methoxycarbonylethyl-, 6β-(t-butoxycarbonylmethyl)-, and 6β-methylthiopenicillanates 10–15 have been prepared stereo-selectively by tri-n-butyltin hydride reduction of the corresponding 6β-isocyanopenicillanates 4–9 A minor side-product (15%) isolated from the reduction of benzyl 6α-(2-hydroxyprop-2-yl)-6β-isocyanopenicillanate 5 was identified as (1R, 5R)-6-[(1R)-1-benzyloxycarbonyl-2-methylprop-1
6β-苄基,6β-(2-羟基丙-2-基) - ,6β甲氧羰基甲基,6β-methoxycarbonylethyl-,6β-(叔丁氧基羰基) - ,和6β-methylthiopenicillanates 10 - 15已经制备立体选择性地通过三-正丁基锡氢化物还原相应的6β-isocyanopenicillanates的4 - 9选自苄基6α-(2-羟基丙-2-基)的还原分离的次要副产物(15%)-6β-isocyanopenicillanate 5被确定as(1R,5R)-6-[((1R)-1-苄氧羰基-2-甲基丙-1-基] -1-(2-羟基丙-2-基)-2,6-二氮杂-4-硫杂双环[3 ,2,0] hept-2-en-7-one 18和少量类似的噻唑啉19和20从6α-苄基-和6α-甲氧基羰基甲基-6β-异氰基Openicillanates 4和6的还原中检测到粗混合物中的。通过三正丁