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. Author manuscript; available in PMC: 2011 Feb 1.
Published in final edited form as: Bioorg Med Chem Lett. 2009 Dec 21;20(3):966–970. doi: 10.1016/j.bmcl.2009.12.051

Scheme 3.

Scheme 3

Preparation of aryl sulfonimides: (a) 3,4-dimethoxybenzenesulfonyl chloride, Et3N, EtOAc, 63-100%; (b) NaH (60% dispersion in oil), 3,4-dimethoxybenzenesulfonyl chloride, DMF, 25-64%; (c) 1M BBr3 in CH2Cl2, CH2Cl2, 0 °C to rt, 48-65%.