反应详情

0.26 g of t-butyl α-{6-[1-ethoxycarbonyl-3-phenylpropylamino]-5-oxo-2-phenylperhydro-1,4-thiazepin-4-yl}acetate [prepared as described in Example 7(i) above (the second fraction)] was subjected to de-t-butylation with trifluoroacetic acid in the manner described in Example 3, giving the title compound as an amorphous solid in a yield of 0.17 g.