反应详情

When in the procedure of Example 1, bis-N,N'-(t-butoxycarbonyl)-(S)-lysine is replaced with N-(9-fluorenylmethyoxycarbonyl)-glycine, [(2,4,6-triisopropyl-phenyl)-acetyl]-sulfamic acid 4-amino-2,6-diisopropyl-phenyl ester is replaced by [(2,4,6-triisopropyl-phenyl)-acetyl]-sulfamic acid 4-(aminomethylene)-2,6-diisopropyl-phenyl ester, and the crude product is stirred in 20% piperidine/N,N-dimethylformamide for 0.5 hours followed by trituration with hexanes, the title compound is obtained; mp 193-195° C.