[C:1]([O:5][C:6](=[O:32])[CH:7]([NH:23][C:24](=[O:31])[CH:25]([NH2:30])[CH2:26][CH:27]([CH3:29])[CH3:28])[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:11][CH:10]=1)([CH3:4])([CH3:3])[CH3:2].[CH:33]([C:36]1[CH:41]=[CH:40][C:39]([S:42](Cl)(=[O:44])=[O:43])=[CH:38][CH:37]=1)([CH3:35])[CH3:34]>>[C:1]([O:5][C:6](=[O:32])[C@@H:7]([NH:23][C:24](=[O:31])[C@@H:25]([NH:30][S:42]([C:39]1[CH:40]=[CH:41][C:36]([CH:33]([CH3:35])[CH3:34])=[CH:37][CH:38]=1)(=[O:44])=[O:43])[CH2:26][CH:27]([CH3:28])[CH3:29])[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:11][CH:10]=1)([CH3:3])([CH3:2])[CH3:4]Using a procedure similar to that described in Example 36, the product from Example AI ([S-(R*,R*)]-2-{2-amino-4-methyl-pentanoylamino}-3-(4-benzyloxy-phenyl)-propionic acid tert-butyl ester) (0.20 g, 0.45 mmol) and 4-isopropylphenylsulfonyl chloride (0.10 g, 0.45 mmol) were coupled to give the title compound as a white solid (0.20 g, 71%), mp=147-148° C.
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