使用一组硫化物o-和p -XC 6 H 4 SMe,通过动力学方法研究了电子效应,空间位阻和TsNHCl加亲电Cl +和NalO 4进行O-转移的邻位助剂。通过比较邻位和对位取代的化合物的反应性(κ= k o / k p),评估了邻位取代基的空间效应和邻位助剂。对于邻居基团的活性,获得以下顺序:CH 2 OH〜CH 2OME〜CH 2 CO 2我
Remarkably Mild and Simple Preparations of Sulfinates, Sulfonyl Chlorides and Sulfonamides from Thioanisoles
作者:Marc De Vleeschauwer、Jacques Gauthier
DOI:10.1055/s-1997-801
日期:1997.4
New and highly yielding procedures to convert thioanisoles into versatile sulfonyl chloride derivatives were developed by strategically taking advantage of the Pummerer reaction.
Chemoselective Reduction of Tertiary Amides by 1,3-Diphenyldisiloxane (DPDS)
作者:Travis A. Hammerstad、Pooja V. Hegde、Courtney C. Aldrich、Kathleen J. Wang
DOI:10.1055/a-1709-3426
日期:2022.5
A convenient procedure for the chemoselective reduction of tertiaryamides at room temperature in the presence of air and moisture using 1,3-diphenyldisiloxane (DPDS) is developed. The reaction conditions tolerate a significant number of functional groups including esters, nitriles, secondary amides, carbamates, sulfoxides, sulfones, sulfonyl fluorides, halogens, aryl-nitro groups, and arylamines.