One-pot synthesis of five-membered cyclic thioethers or ethers via intramolecular nitrile oxide-olefin cycloaddition (INOC) or intramolecular alkoxycarbonyl nitronate-olefin cycloaddition (IAOC) by the use of methyl chloroformate
作者:Ming-Chung Yan、Jing-Yuan Liu、Wen-Wei Lin、Kuo-Hsi Kao、Ju-Tsung Liu、Jeong-Jiunn Jang、Ching-Fa Yao
DOI:10.1016/s0040-4020(99)00741-3
日期:1999.10
with allyl alcohol and base, can be converted into methoxycarbonyl nitronates 22 by treating the solution with methyl chloroformate and calytic amount of 4-dimethylaminopyridine (DMAP) in the presence of different amounts of triethylamine. Intermediates 22 can either undergo intramolecular alkoxycarbonyl nitronate-olefin cycloaddition (IAOC) to generate highly stereoselective product trans-14 or undergo
Stereoselectivity in intramolecular 1,3-dipolar cycloadditions. Nitrile oxides versus silyl nitronates
作者:W. Dehaen、A. Hassner
DOI:10.1016/s0040-4039(00)94618-5
日期:1990.1
Unlike nitrileoxides, silyl nitronates undergo highly stereoselective intramolecularcycloadditions to produce functionalized carbocyclic or heterocyclic rings.
与腈氧化物不同,甲磺酸硅烷基酯会经历高度立体选择性的分子内环加成反应,以生成功能化的碳环或杂环。
Double diastereoselectivity in the intramolecular nitrile oxide-olefin cycloaddition (INOC) reaction.
作者:Hyoung Rae Kim、Hyung Jin Kim、Jetty L. Duffy、Marilyn M. Olmstead、Karin Ruhlandt-Senge、Mark J. Kurth
DOI:10.1016/s0040-4039(00)92143-9
日期:1991.1
An investigation of relative asymmetric induction and double diastereoselectivity in the intramolecularnitrile oxide-olefin cycloaddition (INOC) reaction is presented.
提出了一种相对的不对称诱导和双非对映选择性在分子内的丁腈橡胶-烯烃环加成(INOC)反应。
A Theoretical Evaluation of the Michael-Acceptor Ability of Conjugated Nitroalkenes
作者:Vishal Rai、Irishi N. N. Namboothiri
DOI:10.1002/ejoc.200600505
日期:2006.10
A theoreticalevaluation of the relative Michael-acceptor abilities of a variety of substituted aromatic and aliphatic nitroalkenes is reported. Several global and local reactivity indices were evaluated with the incorporation of natural charge obtained from natural bond orbital (NBO) analysis. Natural charges at the carbon atom β to the NO2 group and the condensed Fukui functions derived by this method
Cycloadditions. 44. A two-step conversion of carbonyl compounds into functionalized five- and six-membered ring thioethers via intramolecular cycloaddition