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Attempted Synthesis of Casbene by Intramolecular Cyclopropanation
The antifungal diterpene casbene has been prepared in low yield by intramolecular cyclopropanation of the vinyldiazomethane reactant formed from geranylgeraniol. Careful analysis of the reaction mixture revealed relatively ...
Enantioselectivity for Catalytic Cyclopropanation with Diazomalonates
The use of chiral azetidinone-ligated dirhodium(II) catalysts activates dinitrogen extrusion from diazomalonates and provides access to cyclopropanation products with selectivities as high as 40-50% ee.
On the Origin of the Conformationally Non-Interconvertable Isomers of Bisphenyldirhodium(III) Caprolactamate
(Journal of the Mexican Chemical Society;, 2009)
A plausible explanation for the unprecedented formation of two conformational isomers of bisphenyldirhodium(III) caprolactamate is presented. The presence of acetic acid during the coupling process leading to the formation ...