Diphenylmethane could be mononitrated to 2- and 4-nitrodiphenylmethane by nitric acid in dichloromethane. Adjustment of experimental conditions gave a mixture of 2,2‘-, 2,4‘-, and 4,4‘-dinitrodiphenylmethane. The occurrence of side reactions was negligible, and the conversions were quantitative in the latter reaction. In both processes conventional separation of the pure isomers appeared realistic from a practical point of view. The reactions ran smoothly and did not necessitate stringent controls against dangerous runaways. This nitration procedure was applied also to the three isomeric mononitrodiphenylmethanes which underwent quantitative mononitration in the unsubstituted ring.
Nitration of Diphenylmethane and the Isomeric Nitrodiphenylmethanes in Dicloromethane
GIUMANINI, Angelo;GEATTI, Paola;VERARDO, Giancarlo
2002-01-01
Abstract
Diphenylmethane could be mononitrated to 2- and 4-nitrodiphenylmethane by nitric acid in dichloromethane. Adjustment of experimental conditions gave a mixture of 2,2‘-, 2,4‘-, and 4,4‘-dinitrodiphenylmethane. The occurrence of side reactions was negligible, and the conversions were quantitative in the latter reaction. In both processes conventional separation of the pure isomers appeared realistic from a practical point of view. The reactions ran smoothly and did not necessitate stringent controls against dangerous runaways. This nitration procedure was applied also to the three isomeric mononitrodiphenylmethanes which underwent quantitative mononitration in the unsubstituted ring.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
