作者:Gary E. Keck、Mark C. Grier
DOI:10.1055/s-1999-2913
日期:——
The N-acyl(phenylseleno)oxazolidinone 5 was prepared (85% yield) by treatment of the lithium salt of oxazolidinone with triphosgene, followed by addition of benzeneselenol. Reduction of 5 with n-Bu3SnH/AIBN gave the N-formyloxazolidinone 6 (99%) and reaction with allyltri-n-butylstannane gave 7 (89%). Bimolecular additions to various alkenes using the N-acyl radical derived from oxazolidinone 5 were also studied. Best results were obtained with electron rich olefins, such as enol ether derivatives. Eight such additions are reported, with yields ranging from 51-90%. Two prochiral substrates showed significant levels of diastereoselectivity in reactions with 5/Bu3SnH.
用三光气处理噁唑烷酮的锂盐,然后加入苯硒醇,制备出 N-酰基(苯基硒)噁唑烷酮 5(收率 85%)。用 n-Bu3SnH/AIBN 还原 5 得到 N-甲酰噁唑烷酮 6(99%),与烯丙基三丁基锡烷反应得到 7(89%)。此外,还研究了利用从噁唑烷酮 5 衍生的 N-酰基对各种烯烃进行双分子加成的情况。富电子烯烃(如烯醇醚衍生物)的效果最好。报告中介绍了八种这样的加成反应,产率在 51-90% 之间。在与 5/Bu3SnH 的反应中,两种亲手性底物显示出显著的非对映选择性。