Behavior of Carbonyl Ylide Generated from 3-Chloro-3-(p-nitrophenyl)diazirine and Acetone. 1,3-Dipolar Cycloaddition to Benzaldehyde and Epoxide Formation
A carbonyl ylide generated from 3-chloro-3-(p-nitrophenyl)diazirine and acetone either 1,3-dipolar cycloadds to benzaldehydes to afford 2,2-dimethyl-4-aryl-5-(p-nitrophenyl)dioxole or intramolecularly cyclizes to give 2-chloro-2-methyl-3-(p-nitrophenyl)-3