Diphenyldichloromethane is known to show high electron-accepting properties [5]. Therefore, we believe that compounds I and II in the reactions under study are aprotic dechloroalkoxylating nucleophiles: the substitution of an alkoxy group for a chlorine atom in
[Ramage, Robert; Atrash, Butrus; Hopton, David; Parrot, Maxwell J. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1985 , p. 1217 - 1226]