Pyridinium -toluenesulfonylmethylide as a formyl anion equivalent
作者:Rudolph A. Abramovitch、Suchet S. Mathur、Daniel W. Saunders、Danny P. Vanderpool
DOI:10.1016/s0040-4039(00)71451-1
日期:1980.1
Pyridinium -toluenesulfonylmethylide serves as a formyl anionequivalent and, in the presence of an alcohol, undergoes 1,4-addition to -substituted maleimides to give alkoxy- (or aryloxy)-methylene-succinimides. The protected aldehyde group can be liberated readily.
N-phenymaleimide has been carried out, and the products obtained have been identified as sulfones from analyses of their IR, UV, and NMR spectra. From the kinetic investigation, a linear Hammett relationship between the σ-value and logK2/K0 has been confirmed. It is concluded that the nucleophilicattack of the sulfinic acid sulfuratom on the carbon of the C=C bond of N-phenylmaleimide is the rate-determining step
Synthesis of
<i>γ</i>
-keto sulfones
<i>via</i>
sulfa-Michael reactions in Brønsted acidic deep eutectic solvent
作者:Ya-Juan Fan、Dan Wang、Liang Wang
DOI:10.1080/10426507.2023.2240933
日期:2023.12.2
A facile sulfonylation of activated alkenes employing sodium arylsulfinates in Brønsted acidic deep eutectic solvent at room temperature has been developed. The choline chloride/p-toluenesulfonic a...