反应详情

The starting material (8-fluoro-1-methyl-1,2,3,4-tetrahydrobenzo[e][1,4]-diazepin-5-ylidenemethyl)phosphonic acid diethyl ester was prepared in an analogous fashion to (1-methyl-1,2,3,4-tetrahydrobenzo[e][1,4]diazepin-5-ylidenemethyl)phosphonic acid diethyl ester, as described in Example 1 by replacing 2-fluorobenzoic acid with 2,4-difluorobenzoic acid.