Methanol → 2-Amino-alpha-((2-(diphenylmethoxy)-1,1-dimethyl-2-oxoethoxy)imino)thiazol-4-acetic acid

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Reaction Steps

135 g of (2-amino-4-thiazolyl)glyoxylic acid are added whilst cooling with ice to a solution of 245 g of O-(1-diphenylmethoxycarbonyl-1-methylethyl)-hydroxylamine in 400 ml of dimethylformamide. The solution is stirred for 5 hours without cooling, and is then added to 4 l of methanol. In order to complete precipitation, stirring continues for 5 hours at 10°, and the product is then filtered off by suction and dried. 320 g (93%) of the title compound are obtained as colourless crystals.

Provenance & Evidence