4-Oxazoline route to stabilized azomethine ylides. Controlled reduction of oxazolium salts
作者:E. Vedejs、J. W. Grissom
DOI:10.1021/ja00218a038
日期:1988.5
Etude, en particulier de l'effet des substituants de l'oxazole de depart sur les produits obtenus
练习曲, en particulier de l'effet des substituants de l'oxazole de leave sur les produits obtenus
Direct <i>N</i>-Me Aziridination of Enones
作者:Jawahar L. Jat、Ajay K. Yadav、Chandra Bhan Pandey、Dinesh Chandra、Bhoopendra Tiwari
DOI:10.1021/acs.joc.1c02785
日期:2022.3.4
The first direct general method for N-Me aziridination of electron-deficient olefins, enones, is described using N-methyl-O-tosylhydroxylamine as the aminating agent in the presence of a Cu(OTf)2 catalyst. The aziridination of vinyl ketones, hitherto unknown for N-Me as well as N-H, has been achieved efficiently. The open-flask reaction is stereospecific, operationally simple, and additive-free. It
1,3-Dipolar cycloaddition reactions of benzo[b]thiophene 1,1-dioxide with azomethine ylides
作者:Nela Malatesti、Andrew N. Boa、Stephen Clark、Robert Westwood
DOI:10.1016/j.tetlet.2006.05.064
日期:2006.7
New pyrrolo derivatives of benzo[b]thiophene 1,1-dioxide have been synthesised via 1,3-dipolar cycloaddition reactions. Reaction of benzo[b]thiophene 1,1-dioxide with stabilised azomethine ylides gave products in low yield but high stereoselectivity whereas reaction with non-stabilised azomethine ylides gave high overall yields but low stereoselectivity.
通过1,3-偶极环加成反应合成了苯并[ b ]噻吩1,1-二氧化物的新吡咯并衍生物。苯并[ b ]噻吩1,1-二氧化物与稳定的甲亚胺烷基化物反应生成的产物收率低,但立体选择性高,而与非稳定的甲亚甲酰基烷基化物反应生成的产物总收率高,但立体选择性低。
Metal- and Additive-Free Intermolecular Aziridination of Olefins Using N-Boc-O-tosylhydroxylamine
作者:Jawahar L. Jat、Bhoopendra Tiwari、Dinesh Chandra、Puneet Kumar、Vikram Singh
DOI:10.1055/a-1879-7974
日期:2022.10
A metal and additive-free stereospecific direct N-H and N-Me aziridination of inactivated olefins is disclosed using N-Boc-O-tosylhydroxylamine (TsONHBoc) as an aminating agent in hexafluoroisopropanol (HFIP). The use of TsONHBoc, which generates the free aminating agent in situ under the reaction conditions, has several inherent advantages over other similar agents, such as low cost, easy access