Preparation of 4- and 6-desphenyl analogues of (−)-clausenamide and alternative synthesis of (+)-epi-clausenamide
作者:Jian Jun Xue、Yu Mei Zhou、Xiao Ming Yu
DOI:10.1016/j.cclet.2011.07.002
日期:2011.11
4- and 6-desphenyl analogues of (−)-clausenamide, 6 and 7, were prepared in optical active form from commercially available d-pyroglutamic acid and the known racemic pyrrolidinone 13, respectively. In order to confirm the absolute stereochemistry of (+)- and (−)-7, intermediate 19b was transferred into the (+)-epi-clausenamide 8.
分别由市售的d-焦谷氨酸和已知的外消旋吡咯烷酮13以旋光活性形式制备(-)-clausenamide的4-和6-去苯基类似物6和7。为了证实的(+)的绝对立体化学-和( - ) - 7,中间19B被转移到(+) -外延-clausenamide 8。