[CH3:1][S:2]([C:5]1[CH:11]=[CH:10][C:8]([NH2:9])=[CH:7][CH:6]=1)(=[O:4])=[O:3].C[Al](C)C.[S:16]1[CH:20]=[CH:19][CH:18]=[C:17]1[C:21]#[N:22]>C1(C)C=CC=CC=1.C(Cl)(Cl)Cl>[CH3:1][S:2]([C:5]1[CH:11]=[CH:10][C:8]([NH:9][C:21]([C:17]2[S:16][CH:20]=[CH:19][CH:18]=2)=[NH:22])=[CH:7][CH:6]=1)(=[O:3])=[O:4]To a suspension of 4-(methylsulfonyl)aniline (10.4 g, 61.1 mmol) in toluene (400 ml) at 0° C., trimethylaluminum (2M solution in toluene, 46.8 ml, 91.6 mmol) was added over 15 minutes. The reaction mixture was warmed to room temperature and stirred for 2 hours. A solution of 2-thiophenecarbonitrile (10.0 g, 91.6 mmol) in toluene (200 ml) was added over 10 minutes and the mixture was heated to 80°-85° C. After 16 hours, the reaction mixture was cooled to room temperature and poured over a slurry of silica gel in chloroform. After filtration, the residue was washed with a mixture of methylene chloride/methanol and later with methanol. The combined filtrates were concentrated and the resulting yellow solid was stirred with ethyl acetate and filtered. The pale yellow solid (9.8 g, 57%) was used in the next reaction without further purification: m.p. (DSC) 182° C. Anal. Calc'd. for C12H12N2S2O2 : C, 51.41, H, 4.31, N, 9.99, S, 22.87 Found C, 51.02, H, 4.37, N, 9.80, S, 22.93,
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