Allylation of Carbonyl Compounds in the Presence of Catalytic Electrogenerated Zinc. Unusual Regioselectivity with a Trifluorinated Analog of Prenyl Bromide.
Tuning the reactivity of organotin(IV) by LiOH: allylation and propargylation of epoxides via redox transmetalation
作者:Moloy Banerjee、Ujjal Kanti Roy、Pradipta Sinha、Sujit Roy
DOI:10.1016/j.jorganchem.2004.12.008
日期:2005.3
In presence of catalytic Pd(0) or Pt(II), a reagent combination of SnCl2-LiOH promotes the reaction of organic halides and epoxides in dichloromethane leading to the regioselective formation of corresponding homoallyl and homopropargyl alcohols in good yields. This 2-carbon extension strategy adds to the repertoire of Barbier reactions via metal salts and reinforces views on the enhanced reactivity of organotin having -OH pendant. (c) 2004 Elsevier B.V. All rights reserved.
Highly efficient water promoted allylation and propargylation of arylepoxides via rearrangement-carbonyl addition
作者:Ujjal Kanti Roy、Sujit Roy
DOI:10.1016/j.tet.2005.10.005
日期:2006.1
A simple and highly efficient one-pot procedure for allylation and propargylation of arylepoxides has been developed. A combination of SnCl2 and catalytic Pd(0) or Pd(II) promotes the reaction of organic halides and epoxides in DMSO with controlled water addition, leading to the regioselective formation of the corresponding homoallyl and homopropargyl alcohols in good yields. (c) 2005 Elsevier Ltd. All rights reserved.
BUSE C. T.; HEATHCOCK C. H., TETRAHEDRON LETT., 1978, NO 19, 1685-1688
作者:BUSE C. T.、 HEATHCOCK C. H.
DOI:——
日期:——
Direct Preparation of Allylic Indium(III) Reagents from Allylic Alcohols via a Reductive Transmetalation of π-Allylnickel(II) with Indium(I) Iodide
InI-mediated direct allylation of carbonyl compounds with allylic alcohols proceeded smoothly with catalytic amounts of Ni(acac)2 and PPh3 to give the corresponding homoallylic alcohols in high yields. Allylindium compounds were shown to be the real allylating agents in the present system. Substituted allylic alcohols gave branched homoallylic alcohols with syn-selectivity irrespective of the geometry