A new method for the synthesis of Z-enediones via IBX-mediated oxidative rearrangement of 2-alkynyl alcohol systems
作者:Benedikt Crone、Stefan F. Kirsch
DOI:10.1039/b515838a
日期:——
o-Iodoxybenzoic acid (IBX) was found to mediate the conversion of alpha-alkynyl alcohols into Z-enediones under notably mild conditions via a novel rearrangement mechanism (33-65% yield, 13 examples).
Copper-Catalyzed One-Pot Synthesis of 1,3-Enynes from 2-Chloro-<i>N</i>-(quinolin-8-yl)acetamides and Terminal Alkynes
作者:Lifan Zhu、Hongyu Guo、Xiujuan Feng、Yoshinori Yamamoto、Ming Bao
DOI:10.1021/acs.joc.0c01102
日期:2020.7.2
one-pot synthesis of 1,3-enynes is described. The reaction of 2-chloro-N-(quinolin-8-yl)acetamides with terminal alkynes proceeds smoothly in the presence of a copper catalyst at room temperature to produce (E)-1,3-enynes in satisfactory to excellent yields. The mechanism study reveals that the cross-dimerization of internal alkynes generated in situ with terminal alkynes proceeds via allene intermediates
The Sonogashirareactionusing nickel ferrite nanoparticles as catalyst and under copper-free conditions was investigated in water as a green solvent. Various types of aryl and alkyl halides were successfully coupled with phenyl acetylene under the optimized reaction conditions with very good to excellent yields at a short time. The catalyst is easily recoverable and can be reused for several runs
Indium-mediated highly regioselective reaction of prop-2-ynyl bromides with acyl cyanides in aqueous media: a convenient synthesis of allenic and propargylic ketones
作者:Byung-Woo Yoo、Sung-Jae Lee、Kwang-Hyun Choi、Sam-Rok Keum、Jae-Jung Ko、Kyung-Il Choi、Joong-Hyup Kim
DOI:10.1016/s0040-4039(01)01494-0
日期:2001.10
Indium-mediatedreaction of acyl cyanides 1 with prop-2-ynyl bromides 2 in aqueousmedia occurs regioselectively to afford either allenic 3 or propargylic ketones 4 depending on the γ-substituent of the prop-2-ynyl bromide under the mild conditions.
Palladium-Catalyzed Rearrangement of 2-Alkynyl Aryl Ketones to Substituted Furans
作者:Huaiyu Sheng、Shonyuan Lin、Yaozeng Huang
DOI:10.1055/s-1987-28157
日期:——
1,4-Diaryl- and 1,4-diaryl-2-alkyl-3-butyn-1-ones can be rearranged catalytically by treatment with Pd(dba)2/PPh3 to give 2,5-substituted and 2,3,5-trisubstituted furans in 26-38% yields.