A radical cyclization route to pyrrolidines based on conjugate addition to electron deficient phenylselenenylalkenes
作者:Stefan Berlin、Lars Engman
DOI:10.1016/s0040-4039(00)00446-9
日期:2000.5
β-unsaturated esters, amides, ketones, nitriles and sulfones were prepared by zinc chloride promoted chloroselenation/dehydrochlorination of the corresponding α,β-unsaturated compounds. After Michaeladdition of allyl or propargylamine and triethylborane initiated reductive radical cyclization in the presence of tris(trimethylsilyl)silane, pyrrolidine and dihydropyrrole derivatives, respectively, were