反应详情

0.4 g of diastereomer B of t-butyl α-[5-oxo-2-phenyl-6-phthalimidoperhydro-1,4-thiazepin-4-yl]acetate [prepared as described in step (f) above] was subjected to dephthaloylization with methylhydrazine in the same manner as described in Example 1(g), to give 0.22 g of the title compound as an amorphous solid.