Water → 4-Hydroxy-5-[(4-methoxy-7-morpholin-4-yl-benzothiazole-2-carbonyl)-amino]-azepane-1-carboxylic acid tert-butyl ester

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Reaction Steps

0.50 g 4-Methoxy-7-morpholin-4-yl-benzothiazole-2-carboxylic acid and 0.31 g 1,1′-carbonyl-diimidazole in 25 ml dimethylformamide were stirred at room temperature for 16 hours. 0.43 g 4-amino-5-hydroxy-azepane-1-carboxylic acid tert-butyl ester were added and stirring was continued for 16 hours at room temperature. Water was added and the mixture was extracted with ethylacetate. Chromatography on silicagel with dichloromethane/methanol 98:2 yielded 0.68 g (79%) 4-hydroxy-5-[(4-methoxy-7-morpholin-4-yl-benzothiazole-2-carbonyl)-amino]-azepane-1-carboxylic acid tert-butyl ester as a yellow solid; M.p.: 71–73° C.; MS (ISP): m/e=507 (M+H+).

Provenance & Evidence