Cyclopentenone formation via hydrogen activation in the reactions of chromium carbene complexes with alkynes
作者:Cynthia A. Challener、William D. Wulff、Benjamin A. Anderson、Steve Chamberlin、Katherine L. Faron、Oak K. Kim、Christopher K. Murray、Yao Chang Xu、Dominic C. Yang、Stephen D. Darling
DOI:10.1021/ja00057a020
日期:1993.2
alkyl chromium carbene complexes with alkynes have been found to give cyclopentenones. Mechanisms are proposed to account for the formation of these products that involve metal hydride intermediates. As has been previously reported for tungsten, molybdenum alkyl complexes have been found to give 1,3-dienes rather than cyclopentenones. The difference between chromium and molybdenum and tungsten may be
Cyclopentenones from the reaction of alkynes with cyclopropylcarbenechromium complexes
作者:James W. Herndon、Seniz U. Tumer、Wayne F. K. Schnatter
DOI:10.1021/ja00218a073
日期:1988.5
Le complexe du chrome reagit avec differents composes aliphatiques acetyleniques et l'on obtient par cycloaddition des cyclopentene-2ones substitues
Le complexe du chrome reagit avec differents composes aliphatiques acetyleniques et l'on obtient par cycloaddition des cyclopentene-2ones substitues
HERNDON, JAMES W.;TUMER, SENIZ U.;SCHNATTER, WAYNE F. K., J. AMER. CHEM. SOC., 110,(1988) N 10, 3334-3335
作者:HERNDON, JAMES W.、TUMER, SENIZ U.、SCHNATTER, WAYNE F. K.
DOI:——
日期:——
Reaction of alkynes with cyclopropylcarbene-chromium complexes: a versatile [4+2+1-2] cycloaddition reaction for the construction of cyclopentenones
作者:Seniz U. Tumer、James W. Herndon、Leonard McMullen
DOI:10.1021/ja00048a008
日期:1992.10
limitations of the reaction between cyclopropylcarbene-chromium complexes and alkynes have been examined. A variety of cyclopropylcarbene complexes and alkynes have been employed in these studies. The reaction appears to be general for most simple alkynes, producing cyclopentenones. A mechanism has been proposed involving metallacyclobutene formation, electrocyclic ringopening, electrocyclic ring closure, CO