Addition of arylmagnesium bromides to aryl(alkyl)acetylenes proceeded in the presence of an iron catalyst and a N-heterocyclic carbene ligand to give high yields of the corresponding alkenylmagnesium reagents, which were transformed into tetrasubstituted alkenes by subsequent treatment with electrophiles. [reaction: see text]
Hydrophenylation of internal alkynes with boronic acids catalysed by a Ni–Zn hydroxy double salt-intercalated anionic rhodium(<scp>iii</scp>) complex
作者:Takayoshi Hara、Nozomi Fujita、Nobuyuki Ichikuni、Karen Wilson、Adam F. Lee、Shogo Shimazu
DOI:10.1039/c5cy01139f
日期:——
[Rh(OH)6]3− intercalated Ni–Zn mixed basic salt (Rh/NiZn) acts as an efficient catalyst for the hydrophenylation of internal alkynes with arylboronic acids under mild conditions.
Rhodium-Catalyzed Three-Component Reaction of Alkynes, Arylzinc Chlorides, and Iodomethanes Producing Trisubstituted/Tetrasubstituted Alkenes with/without 1,4-Migration
作者:He Meng、Shiming Bai、Yu Qiao、Ting He、Weiyi Li、Jialin Ming
DOI:10.1021/acs.orglett.2c02299
日期:2022.7.29
A three-component reaction of alkynes, arylzinc chlorides, and iodomethanes was found to proceed in the presence of a rhodium catalyst to give high yields of trisubstituted/tetrasubstituted alkenes. The usual arylzinc chlorides only gave trisubstitutedalkenes, generated through a migratory carbozincation–cross-coupling sequence, where 1,4-Rh migration from an alkenyl carbon to an aryl carbon occurred
Arylation of alkynes over hydrotalcite docked Rh-m-TPPTC complex
作者:Florentina Neaţu、Mădălina Ciobanu、Laura E. Ştoflea、Ligia Frunză、Vasile I. Pârvulescu、Véronique Michelet
DOI:10.1016/j.cattod.2014.07.004
日期:2015.6
Rh-m-TPPTC complex was successful immobilized onto a hydrotalcite Zn-Al to convert selectively in aqueous media both the symmetric and nonsymmetric alkynes into functionalized alkenes, with boronic acids. The complex preserved its activity after the ionic exchange, leading to excellent results (similar to 87%) for the symmetric alkynes and also for the non-symmetrical alkynes (up to 99%). (C) 2014 Elsevier B.V. All rights reserved.
Sonawane,H.R. et al., Indian Journal of Chemistry, 1965, vol. 3, p. 260 - 265