Pon de relay: A convenient and efficient synthesis of alkene‐functionalized furansfromcyclopropenes, which proceeds through an isomerization/olefination cascade sequence under copper–palladium relaycatalysis, has been developed (see scheme).
Pon de relay:已经开发了一种方便有效的方法,从环丙烯中合成烯烃官能化的呋喃,该过程在铜-钯中继催化下通过异构化/烯化级联序列进行(参见方案)。
Structural Effects on the Rh<sup>II</sup>-Catalyzed Rearrangement of Cyclopropenes
作者:Paul Müller、Christian Gränicher
DOI:10.1002/hlca.19930760134
日期:1993.2.10
The thermocatalytic rearrangement of 2-alkylcycloprop-2-ene-1-carboxylates (1) in the presence of RhII perfluorobutyrate is regio- and stereospecific and leads to the substituted metallocarbenes 3. The latter undergo intramolecular CH bond insertion to form cyclopentylidenes (4). In contrast, the metallocarbenes 19, derived from 2,3-dialkylcycloprop-2-ene-1-carboxylates 6c, d, react to dienes (Z)-20
A highly regioselective tandem 1,3-dipolar cycloaddition of cyclopropene 1,1-diesters and nitrile oxides: synthesis of highly functionalized isoxazoles
作者:Shaojin Chen、Jun Ren、Zhongwen Wang
DOI:10.1016/j.tet.2009.09.034
日期:2009.11
A highly regioselective tandem 1,3-dipolar cycloaddition of cyclopropene 1,1-diesters with nitrile oxides was described. This reaction supplied a new method for synthesis of polyfunctionalized isoxazole derivatives in moderate to excellent yields under mild conditions.
A Reactivity/Affinity Switch for Parallel Kinetic Resolution: α-Amino Acid Quasienantiomers and the Resolution of Cyclopropene Carboxylic Acids
作者:Lian-an Liao、Fan Zhang、Olga Dmitrenko、Robert D. Bach、Joseph M. Fox
DOI:10.1021/ja049779t
日期:2004.4.1
type of parallel kineticresolution (PKR) is reported in which quasienantiomers with very similar reactivities give products whose chromatographic properties diverge upon the addition of fluoride. This concept of a reactivity/affinity switch is applied to the PKR of cyclopropene carboxylicacids with all-carbon quaternary centers. This is the first application of alpha-amino acid quasienantiomers in
Direct synthesis of furans by 3 + 2 cycloadditions between rhodium(II) acetate stabilized carbenoids and acetylenes
作者:Huv M.L. Davies、Karen R. Romines
DOI:10.1016/s0040-4020(01)85968-8
日期:1988.1
Whan appropriate substituents are used, rhodium(II) acatate catalyzed decomposition of diazocarbonyls in the presence of acetylenes results in the formation of furans, derived from dipolar intermediates.