Nature of the Intermediates in Gold(I)-Catalyzed Cyclizations of 1,5-Enynes
作者:Verónica López-Carrillo、Núria Huguet、Ángeles Mosquera、Antonio M. Echavarren
DOI:10.1002/chem.201101749
日期:2011.9.19
The carbene or carbocationic nature of the intermediates in the gold-catalyzedcycloisomerization of 1,5-enynes can be revealed, depending on the ligands on the gold catalysts. Gold complexes with highly electron-donating ligands promote reactions that proceed via intermediates with carbene-like character, leading to products with a bicyclo[3.1.0]hexene skeleton. The intermediate cyclopropyl endo-gold
作者:Teresa M. Nicoletti、Colin L. Raston、Melvyn V. Sargent
DOI:10.1039/c39880001491
日期:——
Methoxy substituted benzyl magnesium chlorides formed by the use of a magnesium anthracene complex smoothly displace the ortho-methoxy group from (o-methoxyaryl)dihydro-oxazoles (oxazolines); the resultant masked o-benzylbenzoic acids are easily converted into anthraquinones.
Radical reactions leading to substituted coumarins
作者:Anne Giraud、Patrice Vanelle、Luc Giraud
DOI:10.1016/s0040-4039(99)00777-7
日期:1999.6
The reaction of 4-hydroxycoumarins with a series of quinonic chlorides under photostimulation was shown to provide an efficient approach to 3-alkylated coumarin derivatives, Alkylation reactions of this type proceeded via an electron transfer mechanism (S(RN)1). (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
US4683087A
申请人:——
公开号:US4683087A
公开(公告)日:1987-07-28
Nicoletti, Teresa M.; Raston, Colin L.; Sargent, Melvyn V., Journal of the Chemical Society. Perkin transactions I, 1990, # 1, p. 133 - 138
作者:Nicoletti, Teresa M.、Raston, Colin L.、Sargent, Melvyn V.