1,5-Stereocontrol in tin(IV) halide mediated reactions between N- and S-substituted pent-2-enylstannanes and aldehydes or imines
作者:Steven J. Stanway、Eric J. Thomas
DOI:10.1016/j.tet.2012.05.032
日期:2012.7
stannane with benzaldehyde proceeded with some stereoselectivity, 80–90:20–10, in favour of the (3Z)-1,5-syn-diastereoisomer, the yield was low due to a competing Lewis acid catalysed 1,4-elimination. N-Acylamino- and S-acylthio-pent-2-enylstannanes reacted with aldehydes with variable syn/anti-stereoselectivities. Tin(IV) chloride promoted reactions of the 4-(dibenzylamino)pent-2-enylstannane with
1,5-Induction in reactions between 4-aminoallylstannanes and aldehydes promoted by Lewis acids
作者:Steven J. Stanway、Eric J. Thomas
DOI:10.1039/c39940000285
日期:——
Transmetallation of tributyl[(4S, 2E)-4-dibenzylaminopent-2-enyl]stannane 7 by tin(IV) bromide generates an allyltin tribromide which reacts with aldehydes to give 5-aminohex-3-enols 8 with effective 1,5-asymmetric induction.