Domino Reaction for the Chemo- and Stereoselective Synthesis of trans-2,3-Dihydrobenzofurans from N-Thiophosphinyl Imines and Sulfur Ylides
摘要:
A novel domino annulation between sulfur ylides and salicyl N-thiophosphinyl imines was developed. The method allows the synthesis of a highly substituted trans-2,3-dihydrobenzofuran skeleton with high yield and excellent chemo- and stereoselectivity.
Synthesis of Functionalized Chromans by P<sup><i>n</i></sup>Bu<sub>3</sub>-Catalyzed Reactions of Salicylaldimines and Salicylaldehydes with Allenic Ester
作者:Yin-Wei Sun、Xiao-Yang Guan、Min Shi
DOI:10.1021/ol102461c
日期:2010.12.17
P(n)Bu3-catalyzed cyclization reactions of salicylaldimines and salicylaldehydes with ethyl 2,3-butadienoate gave the corresponding functionalized chromans in moderate to good yields in THF under mild conditions. The new reaction provides a new method for the synthesis of biologically active chroman products.