Boron trichloride as an efficient and selective agent for deprotection of tert-butyl aryl sulfonamides
作者:Yiqian Wan、Xiongyu Wu、Mahalingam A. Kannan、Mathias Alterman
DOI:10.1016/s0040-4039(03)01020-7
日期:2003.6
A fast, mild and selective method for deprotection of tert-butyl aryl sulfonamides utilizing BCl3 as deprotection reagent has been developed. A variety of tert-butyl aryl sulfonamides used under these conditions gave the corresponding primary sulfonamides in high yields. The method does not cleave methoxy groups and prevents incorporation of tert-butyl groups onto electron-rich aromatic rings.
Scandium Triflate as an Efficient and Recyclable Catalyst for the Deprotection of Tert‐Butyl Aryl Sulfonamides
作者:A. K. Mahalingam、Xiongyu Wu、Yiqian Wan、Mathias Alterman
DOI:10.1081/scc-200048949
日期:2005.1.1
A mild and efficient method for deprotection of tert-butyl sulfonamide groups utilizing Sc(OTf)(3) as deprotecting reagent has been developed. A variety of tert-butyl aryl sulfonamides used under these conditions gave the corresponding primary sulfonamides in high yields. The Lewis acid catalyst could be fully recovered and reused with maintained activity after the reactions.
VILKAS E., BULL. SOC. CHIM. FRANCE, 1978, PART. 2, NO 1-2, 37-38