[C:1]1([C:7]([SH:20])([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.CN(C)C=O.C(N(CC)CC)C.[C:33]([NH:36][C:37](=[O:40])[CH2:38]Cl)(=[O:35])[CH3:34]>O>[C:33]([NH:36][C:37](=[O:40])[CH2:38][S:20][C:7]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)([C:14]1[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=1)[C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1)(=[O:35])[CH3:34]To a suspension of 100.4 g. (0.40 mole) of triphenylmethylmercaptan in 500 ml. of dry dimethylformamide was added 40.4 g. (0.40 mole) of dry triethylamine. The reaction mixture was cooled in ice and stirred as portions of 54.2 g. (0.40 mole) of the product of Step A above were added over 10 minutes. The reaction mixture was stirred an additional hour with ice cooling and then overnight at room temperature. Water was then added carefully to the reaction mixture until just before the cloud point, when the mixture was seeded and crystallization began. Yield of product was 98.5 g. with an m.p. of 147°-149° C.
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