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A new strategy for the chemoselective sulfonamide N-alkylation of sulfonyl ureas under neutral and mild conditions

✍ Scribed by Mehdi Adib; Ehsan Sheikhi; Gita Sheikhi Moghaddam; Hamid Reza Bijanzadeh

Publisher: Elsevier Science
Year: 2010
Tongue: French
Weight: 216 KB
Volume: 51
Category: Article
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2010.06.054

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✦ Synopsis

An efficient and chemoselective sulfonamide N-alkylation of sulfonyl ureas is described. The sulfonyl urea derivatives, prepared in situ by the addition of an amine to an arylsulfonyl isocyanate, are selectively alkylated in excellent yields under neutral and mild conditions by treatment with trialkylphosphitedimethyl acetylenedicarboxylate at ambient temperature.

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