[CH2:1]([O:3][C:4]1[CH:21]=[CH:20][C:7]([CH:8]=[N:9][C:10]2[CH:15]=[CH:14][C:13]([S:16](=[O:19])(=[O:18])[NH2:17])=[CH:12][CH:11]=2)=[CH:6][CH:5]=1)[CH3:2].C[Si]([C:26]#[N:27])(C)C>>[CH2:1]([O:3][C:4]1[CH:21]=[CH:20][C:7]([CH:8]([NH:9][C:10]2[CH:15]=[CH:14][C:13]([S:16](=[O:19])(=[O:18])[NH2:17])=[CH:12][CH:11]=2)[C:26]#[N:27])=[CH:6][CH:5]=1)[CH3:2]Following a procedure similar to that described in Example 1(ii), but using N-(4-ethoxybenzylidene)-4-sulfamoylaniline [prepared as described in step (i) above] and trimethylsilyl cyanide as starting materials, the title compound was obtained as a slightly yellow powder (yield 88%).
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