反应详情

In a similar manner to the procedures described in Preparative Examples 1(i)′, (ii) and (iii) above, reactions were carried out successively, using (2S)-1-benzyloxycarbonyl-4,4-difluoroproline as a starting material instead of (2S,4R)-1-benzyloxycarbonyl-4-methoxyproline, to give the title compound as a pale yellow oil (total yield for the 3 steps: 14%).