BIRTWISTLE, DAVID H.;BROWN, JOHN M.;FOXTON, MICHAEL W., TETRAHEDRON, 44,(1988) N3, C. 7309-7318
作者:BIRTWISTLE, DAVID H.、BROWN, JOHN M.、FOXTON, MICHAEL W.
DOI:——
日期:——
Diastereoselectivity in the intramolecular diels-alder reaction of dienylpropynoates
作者:David H. Birtwistle、John M. Brown、Michael W. Foxton
DOI:10.1016/s0040-4020(01)86103-2
日期:1988.1
ratio in Diels-Alderreactions of α-chiral dienes has been examined. Cycloaddition of E-3,5-hexadien-2-ol and methyl propynoate gives a mixture of all four diastereomers. Intramolecular condensation of the related ester (6) was completely regioselective however, and one stereoisomer predominated by 6.4:1. Similar results were obtained for the corresponding secondary amide, for propynoate esters of a homologous