Dimethyl acetylenedicarboxylate → HCID 12403020, compound

Participants

Reaction Steps

11.0 g. of dimethylacetylene dicarboxylate is added dropwise to a solution of 5.25 g. of 2-chloro-1,3-diaminobenzene in 100 ml. of methanol at room temperature. The mixture is stirred for 2 hours at room temperature and the resulting yellow solid is collected by filtration. The solid is washed with 20 to 50 ml. of methanol, dried under vacuum at 60° C., and recrystallized from acetone. The tetramethyl[2-chloro-m-phenylene-diamino]dimaleate melts at 202.5°-204.5°C.

Provenance & Evidence