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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 1.

Scheme 1

Preparation of bis-arylsulfonamides: (a) 3,4-dimethoxybenzenesulfonyl chloride, triethylamine, ethyl acetate, 35-100%; (b) 1M BBr3 in CH2Cl2, CH2Cl2, 0 °C to rt, 36-86%.