and efficient one-pot synthesis of new sulfonamides is described. The reaction of primary or secondaryaminederived sulfonate salts in the presence of cyanuric chloride, triethylamine as base, and anhydrous acetonitrile as solvent at room temperature gives the corresponding sulfonamides in good to excellent yields. one-pot reaction - sulfonamides - amine-sulfonate salt - cyanuric chloride - triethylamine
METHOD FOR DEPROTECTING ARYL OR ALKYL SULFONAMIDES OF PRIMARY OR SECONDARY AMINES
申请人:Lefenfeld Michael
公开号:US20090306391A1
公开(公告)日:2009-12-10
The invention relates to a method for removing an alkyl sulfonyl or aryl sulfonyl protecting group from a primary or secondary amine by contacting an alkyl sulfonamide or an aryl sulfonamide with a Stage 0 or Stage I alkali metal-silica gel material in the presence of a solid proton source under conditions sufficient to form the corresponding amine. The invention also relates to a method for removing an alkyl sulfonyl or aryl sulfonyl protecting group from a primary or secondary amine by a) reacting an alkyl sulfonamide or an aryl sulfonamide with a Stage 0 or Stage I alkali metal-silica gel material, and b) subsequently reacting the reaction product from step a) with an electrophile or a proton source. Preferred Stage 0 or Stage I alkali metal-silica gel materials include Na, K
2
Na, and Na
2
K.
Selective Synthesis of Cyclic Nitroene‐Sulfonamides from Aliphatic Sulfamides and NOBF<sub>4</sub>
作者:Quan Huang、Sa Li、Yuqin Jiang、Xiao‐Feng Xia
DOI:10.1002/ejoc.202300266
日期:2023.6.14
An efficient regio- and site-selective desaturation and β-nitration of cyclicaliphatic amides through a selective HAT/oxidative desaturation/electrophilic nitration process was realized.
Ligand enabled none-oxidative decarbonylation of aliphatic aldehydes
作者:Bo Li、Shihao Liu、Wu Fan、Xiaotong Shen、Jing Xu、Suhua Li
DOI:10.1016/j.cclet.2022.108027
日期:2022.11
example of Ir(I)-catalyzed direct decarbonylation of α-quaternary aldehydes with broad substrate scope and good functional group compatibility via judicious selection of ligand. The α-chirality is memorized in this decarbonylation process. In addition, we report a broad-spectrum decarbonylation of α-secondary and α-tertiary aldehydes containing multifunctional groups with an improved Rh(I)/DPPP recipe