Dimethylformamide → trans-4-(2-cyanoiminothiazolidin-3-yl)-3,4-dihydro-3-hydroxy-6-mesyl-2,2-dimethyl-2H-1-benzopyran

Participants

Reaction Conditions

Reaction Steps

A mixture of 3,4-dihydro-3,4-epoxy-6-mesyl-2,2-dimethyl-2H-1-benzopyran (1.5 g), 2-(cyanoimino)-thiazolidine (1.1 g), triethylamine (3 ml) and N,N-dimethylformamide (6 ml) was stirred at 100° C. for 5 hours. After cooling, the reaction mixture was poured into water. The precipitate was collected by filtration, washed well with water and dried in vacuo to give trans-4-(2-cyanoiminothiazolidin-3-yl)-3,4-dihydro-3-hydroxy-6-mesyl-2,2-dimethyl-2H-1-benzopyran (1.6 g).

Provenance & Evidence