Modular and Highly Stereoselective Approach to All-Carbon Tetrasubstituted Alkenes
作者:Vladislav Kotek、Hana Dvořáková、Tomáš Tobrman
DOI:10.1021/ol503624v
日期:2015.2.6
A modular and completely stereoselectiveapproach for the construction of all-carbon tetrasubstituted alkenes is described. It is based on the three-fold, sequential metal-catalyzed, cross-coupling functionalization of simple enolphosphate dibromide templates with carbon nucleophiles, affording tetrasubstituted alkenes as single isomers.
Reaction of lithium alkynolates with acid chlorides: A conventional approach to the preparation of ynol esters
作者:Viktor V. Zhdankin、Peter J. Stang
DOI:10.1016/s0040-4039(00)60318-0
日期:1993.2
Lithium alkynolates (R-CCOLi, R = CH3, n- C4H9, t-C4H9, Ph), generated in situ from dibromomethylketones and a strong base, react with electrophiles (diethyl chlorophosphate or benzoyl chloride) with the formation of the corresponding ynol esters.
由二溴甲基酮和强碱原位生成的炔醇锂(RCCOLi,R = CH 3,n- C 4 H 9,tC 4 H 9,Ph)与亲电子试剂(氯代磷酸二乙酯或苯甲酰氯)反应形成相应的炔诺酸酯。
Selective 1,2-dihalogenation and oxy-1,1-dihalogenation of alkynes by N-halosuccinimides
作者:Jinhua Liu、Wenjuan Li、Chao Wang、Yao Li、Zhiping Li
DOI:10.1016/j.tetlet.2011.06.047
日期:2011.8
1,2-Dihalogenation and oxy-1,1-dihalogenation of alkynes by N-halosuccinimides can be selectively realized through using different reaction conditions. alpha,beta-Dihalo alkenes were obtained exclusively using THF as solvent without using any catalyst, while alpha,alpha-dihalo ketones were synthesized using a mixed solvent of THF and H2O in the presence of FeCl3 center dot 6H(2)O. Terminal aromatic alkynes are smoothly transformed into alpha,alpha-dihalo ketones on water without a catalyst. (C) 2011 Elsevier Ltd. All rights reserved.
Comparison of the addition of bromine chloride to 1-hexene and 1-hexyne in carbon tetrachloride and methanol
作者:Victor L. Heasley、Dale F. Shellhamer、John A. Iskikian、David L. Street、Gene E. Heasley