Synthesis of a key intermediate for Thienamycin and Imipenem through stereoselective two-direction elongation of asymmetrized bis(hydroxymethyl)acetaldehyde (BHYMA∗)
作者:Luca Banfi、Giuseppe Guanti、Maria Teresa Zannetti
DOI:10.1016/0040-4039(95)02177-9
日期:1996.1
The enantioselective formal synthesis of Thienamycin and Imipenem has been realised through two-direction elongation of the chiral building block bis(hydroxymethyl)acetaldehyde 5. The generation of the two additional stereocentres has been carried out with excellent diastereoselectivity thanks to two sequential “protecting group controlled” nucleophilic additions. Another key step was represented by
通过手性结构单元双(羟甲基)乙醛5的双向延伸,实现了噻菌霉素和亚胺培南的对映体选择性形式合成。由于两个连续的“受保护基团控制的”亲核加成,两个额外的立体中心的生成具有出色的非对映选择性。另一个关键步骤以伯-仲1,3-二醇区域选择性氧化为相应的β-羟酸为代表。