报道了β-、γ-和δ-不饱和N-酰基磺酰胺环异构化为N-磺酰基内酰胺和亚胺酸酯。这种转变是在 Co III (salen) 催化剂的存在下使用t -BuOOH 或空气作为氧化剂进行的。该方法显示出良好的官能团耐受性(烷基、芳基、杂芳基、醚、N -Boc),并提供了一类尚未开发的环状结构单元。研究了转化的强溶剂依赖性,并强调了N-磺酰亚胺酯产品类的合成多功能性。
Aziridine, azetidine, and pyrrolidine rings were formed in high yields by anodicoxidation of the corresponding dimethyl α-(ω-tosylaminoalkyl)malonates in methanol containing KI as a mediator.
General and Highly Efficient Synthesis of 2-Alkylideneazetidines and β-Lactams via Copper-Catalyzed Intramolecular N-Vinylation
作者:Hongjian Lu、Chaozhong Li
DOI:10.1021/ol062274i
日期:2006.11.9
[GRAPHICS]N-Tosyl-3-halo-3-butenylamines underwent efficient Ullmann-type coupling with the catalysis of Cul/N/N'-dimethylethylenediamine to afford 2-alkylideneazetidines, which could be readily converted to the corresponding, beta-lactams by oxidation with O-3.
SHONO, TATSUYA;MATSUMURA, YOSHIHIRO;KATOH, SUSUMU;OHSHITA, JYOJI, CHEM. LETT.,(1988) N 6, 1065-1068