Diazo compounds and phenyliodonium ylides in inter-and intramolecular cyclopropanations catalyzed by dirhodium (II). Synthesis and chiral resolution by GC versus …
A Ghanem, F Lacrampe, HY Aboul-Enein…
Index: Ghanem, Ashraf; Lacrampe, Fabienne; Aboul-Enein, Hassan Y.; Schurig, Volker Monatshefte fur Chemie, 2005 , vol. 136, # 7 p. 1205 - 1219
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Citation Number: 10
Abstract
Summary. The dirhodium (II)-catalyzed intermolecular cyclopropanation of a set of olefins with either diazo free phenyliodonium ylides or diazo compounds afforded cyclopropanes derived from Meldrum's acid, dimethyl malonate,(silanoxyvinyl) diazoacetates, 3, 3, 3- trifluoro-2-diazopropionate, ethyl diazo (triethyl)-and (dimethylphenyl) silylacetate with moderate to high yield in either racemic or enantio-enriched forms. The intramolecular ...
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