A Facile and Efficient Approach to
<i>N</i>
‐Protected‐β‐Sulfinyl‐ enamines
<i>via C</i>
‐Sulfinylation of Enamides and Enecarbamates
作者:Yinhui Li、Ke Cheng、Xiaoxia Lu、Jian Sun
DOI:10.1002/adsc.201000084
日期:2010.10.9
A practical method has been developed for the C-sulfinylation of enamides and enecarbamates using sodium phenylsulfinate/methyltrichlorosilane (PhSO2Na/MeSiCl3) as the sulfinylating reagent and N,N-dimethylacetamide (DMAc) as the Lewis base promoter, which allows for the preparation of a variety of N-protected-β-sulfinylenamines in high yields and good stereoselectivities. The Lewis base is found to
已开发出一种实用的方法,使用苯磺酸钠/甲基三氯硅烷(PhSO 2 Na / MeSiCl 3)作为亚磺酰化试剂,并使用N,N-二甲基乙酰胺(DMAc)作为路易斯碱促进剂,对酰胺和烯氨基甲酸酯进行C-亚磺酰基化。以高收率和良好的立体选择性制备各种N-保护的β-亚磺酰亚胺胺。发现路易斯碱对于活性亚磺酰基化物质(PhSOC1)的原位生成和亚磺酰基化步骤均是重要的。