Maleates from diazoacetates and dilactones from head-to-head dimerisation of alkenyl diazoacetates using Grubbs' 2nd-generation ruthenium carbene catalyst
作者:David M. Hodgson、Deepshikha Angrish
DOI:10.1039/b510829b
日期:——
Grubbs' 2nd-generation ruthenium carbene catalyst homocouples diazoacetates to maleates and also catalyses head-to-head dimerisation of alkenyl diazoacetates giving dienyl dilactones.
Highly Chemo- and Stereoselective Intermolecular Coupling of Diazoacetates To Givecis-Olefins by Using Grubbs Second-Generation Catalyst
作者:David M. Hodgson、Deepshikha Angrish
DOI:10.1002/chem.200601692
日期:2007.4.16
Highly stereoselective formation of cis-2-ene-1,4-diesters by homo- and heterocoupling of alpha-diazoacetates in the presence of Grubbs second-generation catalyst is demonstrated. The dual reactivity of the catalyst in alkene metathesis and diazocoupling has been exploited in the synthesis of 12-26-membered macrocyclic dienyl dilactones by one-pot carbene dimerisation/ring-closing metathesis.
Cyclopropanation versus carbon–hydrogen insertion. The influences of substrate and catalyst on selectivity
作者:Michael P Doyle、Iain M Phillips
DOI:10.1016/s0040-4039(01)00408-7
日期:2001.4
Reactions of diazoacetates with varying linkages from the diazo-carbon to a vinyl group, catalyzed by chiral copper(I) and rhodium(II) compounds, were examined for selectivity in their intramolecularreactions. Bis-oxazoline-ligated copper(I) has advantages for cyclopropanation that form medium-to-large rings. Dirhodium(II) carboxamidates have advantages for small-ring-fused cyclopropane compounds