[EN] ZWITTERIONIC PHOSPHONIUM SALTS<br/>[FR] SELS DE PHOSPHONIUM ZWITTERIONIQUES
申请人:UNIV MCGILL
公开号:WO2010012096A1
公开(公告)日:2010-02-04
A zwitterionic phosphonium salt of Formula I: wherein n is 0 or 1; R is H or SO3-; R' is selected from the group consisting of C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, phenyl, substituted phenyl, benzyl and C1-C10 alkoxycarbonyl; R' is CX3 when n is O; and X is selected from the group consisting of F, Cl, Br and I. The zwitterionic phosphonium salts are useful reagents for the preparation of alkenes and acetals from the corresponding aldehyde.
Acidic zeolite nanofiber assemblies with highly mesoporous structures as catalysts for the formation of a range of acetals in good yields.
酸性沸石纳米纤维组装体具有高度介孔结构,可作为催化剂,在良好产率下形成一系列缩醛。
Rearrangement of substituted aromatic acetals catalysed by γ -alumina
作者:N. Xavier、S.J. Arulraj
DOI:10.1016/s0040-4020(01)96608-6
日期:1985.1
Aromatic acetals over γ-alumina undergo rearrangement to give the corresponding esters (b) and ethers (c) in good yield. The product distribution varied unusually over the range of reaction temperatures. The effect of substituents has also been felt much in the study. Probable mechanisms have been suggested for the reaction. The catalyst has been characterized by various studies and the specific poisoning
Mathiyalagan, Journal of the Indian Chemical Society, 2012, vol. 89, # 11, p. 1499 - 1506
作者:Mathiyalagan
DOI:——
日期:——
Rhenium complex-catalyzed allylation of acetals with allyltrimethylsilane
作者:Yutaka Nishiyama、Keiko Shimoura、Noboru Sonoda
DOI:10.1016/j.tetlet.2008.09.001
日期:2008.11
It was confirmed that the treatment of acetals with allyltrimethylsilane in the presence of a catalytic amount of the rhenium complex, ReBr(CO)(5), gave the corresponding homoallylic ethers in excellent to good yields. (C) 2008 Elsevier Ltd. All rights reserved.