Two stereocontrolledapproaches for the advanced intermediate (2) of 1β-methylthienamycin have been described.
已经描述了用于1β-甲基硫代霉素的高级中间体(2)的两种立体控制方法。
1β-Methylthienamycin: Some stereocontrolled approaches towards the key intermediate
作者:Mukund K Gurjar、Manjunath N Bhanu、Vivek B Khare、Ashok Bhandari、Madhusudhan N Deshmukh、A V Rama Rao
DOI:10.1016/s0040-4020(01)96165-4
日期:1991.8
Two stereocontrolled approaches towards a precursor of 1 beta-methyl-thienamycin, have been accomplished by involving stereospecific hydrogenation of 13 and stereoselective hydroboration oxidation of 9. The latter compounds were obtained from the easily accessible chiral building block 7. The hydroboration-oxidation approach was extended to 18 in which the optically active 1R- (1-hydroxy ethyl) side-chain was incorporated. The highly stereoselective hydroboration-oxidation reaction of 9 is explained by considering Houk's models.