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Reactions of sulfonamides with readily available N-acylbenzotriazoles (RCOBt, where R is an aryl, heteroaryl, or N-Cbz-protected--amino(alkyl) group), in the presence of NaH, produced Nacylsulfonamides in 76-100% yields. The ability to utilize N-acylbenzotriazoles for which the corresponding acid chlorides are not easily prepared, may be especially advantageous.
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Katritzky et al. (2004) studied this question.
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