作者:John Colucci、David Lee、Marie-Claire Wilson、Ann Chau
DOI:10.1021/ol0271436
日期:2002.12.1
[reaction: see text] The diastereoselective cyclization of bissulfonyl esters was investigated by varying both the size and the placement of the substituent on the tether adjoining the reacting centers. Substitution at either the alpha or beta position relative to the ester moiety gave diastereomeric ratios of (1-3):1, while gamma substitution dramatically increased the diastereomeric ratios to (6-20):1
[反应:见正文]通过改变取代基在连接反应中心的系链上的取代基的大小和位置,研究了双磺酰基酯的非对映选择性环化。在相对于酯部分的α或β位置上的取代给出了(1-3):1的非对映体比率,而γ取代极大地将非对映体的比率增加至(6-20):1。