Ammonium Hydroxide → 2-Cyanimino-3-(4-hydroxy-benzyl)-thiazolidine

Participants

Reaction Steps

0.49 g (2 moles) of 2-cyanimino-3-(4-methoxybenzyl)-thiazolidine are dissolved in 12 ml of dichloromethane and a solution of 3.01 g (1.14 ml, 13 mmoles) of borotribromide in 5 ml of dichloromethane is added in an argon atmosphere, dropwise. The mixture is stirred for 12 hours and is then alkalized with an aqueous ammonium hydroxide solution, under stirring and cooling. The phases are separated and the organic phase is evaporated. 0.22 g of 2-cyanimino-3-(4-hydroxy-benzyl)-thiazolidine are obtained in a white crystalline form, melting at 175° to 177° C.

Provenance & Evidence