A Facile Synthesis of 4-Arylbutyrolactones via the Palladium-catalyzed Arylation of 1,3-Dioxep-5-ene
摘要:
1,3-Dioxep-5-ene was arylated by using Heck reaction, and the arylated 1,3-dioxep-4-ene derivatives were easily converted into 4-arylbutyrolactones, intermediates for the synthesis of natural products and biological active compounds.
A Redox-Relay Heck Approach to Substituted Tetrahydrofurans
作者:Tom J. M. Byrne、Megan E. Mylrea、James D. Cuthbertson
DOI:10.1021/acs.orglett.3c00769
日期:——
An operationally simple and efficient strategy for the synthesis of substituted tetrahydrofurans from readily available cis-butene-1,4-diol is described. A redox-relay Heck reaction is used to rapidly access cyclichemiacetals that can be directly reduced to afford the corresponding 3-aryl tetrahydrofuran. Furthermore, the hemiacetals can also serve as precursors to a range of disubstituted tetrahydrofurans
β-Vinyl-γ-butyrolactones via the palladium-catalysed reaction of vinyl triflates with Z-2-buten-1,4-diol
作者:A Arcadi、E Bernocchi、S Cacchi、F Marinelli
DOI:10.1016/s0040-4020(01)86427-9
日期:1991.1
The palladium-catalysed reaction of vinyl triflates with Z-2-buten-1,4-diol affords beta-vinyl-gamma-butyrolactols (4-vinyl-2-hydroxy-tetrahydrofurans) which are converted into the corresponding beta-vinyl-gamma-butyrolactones by a smooth oxidation with Ag2CO3 on celite. Preparation of beta-substituted-gamma-butyrolactones can be performed without the isolation of the intermediate gamma-butyrolactols, thus simplifying the procedure and usually with higher overall yields. The outcome of the palladium-catalysed formation of beta-substituted-gamma-butyrolactols strongly depends on the nature of the added base. Best results are obtained by using NaHCO3 or K2CO3 in the presence of n-Bu4NCl or TEBA.
MANDAI, TADAKATSU;HASEGAWA, SHUN-ICHI;FUJIMOTO, TADASHI;KAWADA, MIKIO;NOK+, SYNLETT.,(1990) N, C. 85-86