反应详情

A solution of N-(3,5-difluorobenzyl)-glycine methyl ester (7.61 g, 0.0352 mole) and formic acid (1.33 ml, 0.0352 mole) was heated at reflux in xylene (60 ml) with azeotroic removal of water for 2.5 hours and the solvent was removed under vacuum to give the product as an oil (8.50 g, 99%).

1. customthe solvent was removed under vacuum