Phase-Transfer-Catalyzed Cyclopropanation. Synthesis of 1,2-Dibenzoyl-3-arylcyclopropanes
The 1,t-2,t and 1,t-2,c-isomers of 1,2-dibenzoyl-3-phenylcyclopropanes have been prepared by the cycloaddition of carbonyl-stabilized sulfur ylides to trans-chalcones under phase-transfer conditions.The configurations of the isomers were characterized by
Reddy, D. Bhaskar,Reddy, B. Venkataramana,Seshamma, T.,Reddy, N. Subba,Reddy, M. V. Ramana
p. 289 - 290
(2007/10/02)
Studies on Carbonyl Stabilized Sulphonium Ylids : Reaction with α,β-Unsaturated Carbonyl Compounds
1,2,3-Trisubstituted-cyclopropanes (3a-j) have been prepared by the reaction of the sulphur ylids phenacylidenedimethylsulphurane (1a) and 4-methylphenacylidenedimethylsulphurane (1b) with α,β-unsaturated ketones (2).The carbonyl stabilized ?-sulphuranes (1) have been generated from their corresponding salts.Structural assignments of the products are based on their IR and PMR data.
Tewari, R. S.,Awasthi, A. K.
p. 168 - 169
(2007/10/02)
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