A highly regioselective reduction of propargylic acetates has been attained by using SmI2 and catalytic Pd(0) in the presence of 2,4-dimethyl-3-pentanol affording various types of allenes in high yields.
Synthesis of 2,5-dialkyl-substituted tetrahydrofurans — symmetrical analogs of natural acetogenins
作者:A. A. Makarov、I. V. Ishbulatov、E. Kh. Makarova、U. M. Dzhemilev、V. A. D’yakonov
DOI:10.1007/s11172-023-3833-6
日期:2023.3
An efficient method has been developed for the synthesis of 2,5-dialkyl-substituted tetrahydrofurans, analogues of natural acetogenins. A series of tetrahydrofurans of this type have been obtained using the Ti-catalyzed homo-cyclomagnesiation of terminal 1,2-dienes at the key stage. By Ru-catalyzed oxidation of symmetrical nZ,(n+4)Z—dienes, ketols containing a tetrahydrofuran fragment were synthesized