反应详情

The complete yield of N-(2,2-dimethyl-1,2,3,4-tetrahydronaphthalen-1-yl)glycine methyl ester of the process a) is added dropwise with cooling to 5° C. to 67.8 ml of formic acid. Additionally 24.9 ml of acetic anhydride are added, and the mixture is kept at room temperature for 70 hours. Destillation under vacuum affords 35.2 g of N-formyl-N-(2,2-dimethyl-1,2,3,4-tetrahydronaphthalen-1-yl)glycine methyl ester having a melting point of 74°-75° C.