2-[(Naphthalen-1-yl)methylidene]butanedioic acid → 3-[(Naphthalen-1-yl)methylidene]oxolane-2,5-dione

Participants

Reaction Conditions

Reaction Steps

A mixture of 38 g of (1-naphthalenylmethylene)butanedioic acid and 270 ml of acetic anhydride was heated at 60° C. for one hour. The mixture was evaporated under reduced pressure to give 41.96 g of an oil. The oil was crystallized from 220 ml of toluene-hexane (1:1) to give 24.94 g of crystals, mp 162°-164° C.

Provenance & Evidence