C1(C(C2C=CC=CC=2)(C2C=CC=CC=2)[NH:8][CH2:9][CH2:10][S:11][C:12](OC2C=CC([N+]([O-])=O)=CC=2)=[O:13])C=CC=CC=1.[NH:36]1[CH2:41][CH2:40][CH2:39][CH2:38][CH2:37]1>>[N:36]1([C:12]([S:11][CH2:10][CH2:9][NH2:8])=[O:13])[CH2:41][CH2:40][CH2:39][CH2:38][CH2:37]1N-triphenylmethyl-2-paranitrophenoxycarbonylthioethylamine (300 mg) and piperidine (184 μl) were subjected to similar reations to those described in References 2 and 4 to give 2-piperidinocarbonylthioethylamine (crude formate: 137 mg). The product was dissolved in anhydrous methanol (3 ml). To the solution were added triethylamine (432 μl) and mitomycin A (151 mg: 0.7 molar equivalent). The solution was treated in a similar manner to that described in Example 1 to obtain Compound 42 (0.21 mg) in the form of grayish blue powders with a yield of 74%.
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