Radical-mediated intramolecular β-C(sp<sup>3</sup>)–H amidation of alkylimidates: facile synthesis of 1,2-amino alcohols
作者:Xue-Qing Mou、Xiang-Yu Chen、Gong Chen、Gang He
DOI:10.1039/c7cc08897c
日期:——
A new radical-mediated intramolecular β-C(sp3)–H amidation reaction of O-alkyl trichloro- or arylimidates is reported. Various oxazolines were efficiently prepared from easily accessible alcohol starting materials. The trichloro-oxazoline products can be hydrolyzed under mild conditions to give valuable 1,2-amino alcohols. This amidation reaction exhibits a broad substrate scope and good functional
Selective synthesis of heterocyclic compounds through the intramolecular substitution of phenylselenonyl group by nitrogen or carbonyl oxygen in amides
Nitrogen heterocycles were produced by the oxidation of N-[ω-(phenylseleno)alkyl]-p-toluenesulfonamides through the intromolecular substitution of the resultant phenylselenonyl group by the nitrogen atom. By the oxidation of the corresponding benzamides, on the other hand, cyclization by nitrogen or carbonyl oxygen proceeded depending on the number of carbon atoms between the nucleophile (amide) and
strategy is described here. Amide is used as the O- and N- source to probe for regiocontrol strategies. Notably, simple additives can be selectively introduced to achieve regiodivergent oxyamination processes for electronically activated alkenes while being regio-complementary for unactivated alkenes. Our preliminary data demonstrates that this regiocontrol strategy based on nucleophile can also be applied
本文描述了一种新型碘化物催化分子间氨氧化策略。酰胺用作 O 源和 N 源来探测区域控制策略。值得注意的是,可以选择性地引入简单的添加剂,以实现电子活化烯烃的区域发散的氧胺化过程,同时对未活化的烯烃进行区域互补。我们的初步数据表明,这种基于亲核试剂的区域控制策略也可以应用于使用手性高价碘催化的不对称过程。
The Synthesis of N-Benzoyl Aziridines from β-Benzamidoalkyl Phenyl Selenides
作者:Virginia R. Ward、Matthew A. Cooper、A. David Ward