硝基芳烃与带有离去基团和吸电子基团的仲和叔碳负离子的反应:二氢萘[ 2,1- c ]异恶唑N-氧化物和二氢异恶唑[4,3- f ]喹啉N-氧化物的方法
摘要:
2-硝基萘(1)和6-硝基喹啉(2)与衍生自带有离去基团和吸电子基团的亚甲基和次甲基的仲和叔碳负离子(例如,氯乙酸甲酯,氯乙酸乙酯,氯乙腈,甲基在低温下在氢化钠/ N,N-二甲基甲酰胺体系中的2-氯丙酸酯,2-氯丙酸酯和2-氯丙腈)制得相应的二氢萘[ 2,1- c ]异恶唑N-氧化物3和二氢异异恶唑[4] ,3- f ]喹啉N-氧化物4。另一方面,硝基芳烃1和2与氢化钠/四氢呋喃系统中的仲碳负离子反应,生成相应的常规替代性亲核取代(VNS)产物5和6。
Preparation of nitroaralkyl cyanides and derivatives thereof
申请人:ETHYL CORPORATION
公开号:EP0078709A2
公开(公告)日:1983-05-11
Nitroarylalkyl cyanides may be prepared in a convenient manner by reacting a nitroaromatic compound with an alpha, alpha-disubstituted alkyl cyanide, e.g. an alpha, alpha-disubstituted acetonitrile, in a substantially anhydrous aprotic solvent and in the presence of a base so that the nitrile undergoes a nucleophilic substitution on an unsubstituted ring carbon of the nitroaromatic compound during which an alpha-subsituent functions as a leaving group. The nitroaralkyl cyanides formed by the process can be readily converted into derivatives, such as pharmaceuticals.
Reactions of nitroarenes with secondary and tertiary carbanions bearing both a leaving group and electron-withdrawing group: An approach to dihydronaphth[2,1-<i>c</i>]isoxazole<i>N</i>-oxides and dihydroisoxazolo[4,3-<i>f</i>]quinoline<i>N</i>-oxides
作者:Hiroshi Maruoka、Yukihiko Tomioka
DOI:10.1002/jhet.5570400613
日期:2003.11
2-Nitronaphthalene (1) and 6-nitroquinoline (2) underwent direct cyclocondensation with secondary and tertiary carbanionsderivedfrom a methylene and methine group bearing both a leaving group and electron-withdrawing group (e.g., methyl chloroacetate, ethyl chloroacetate, chloroacetonitrile, methyl 2-chloropropionate, ethyl 2-chloropropionate and 2-chloropropionitrile) in the sodium hydride/N,N-dimethylformamide
2-硝基萘(1)和6-硝基喹啉(2)与衍生自带有离去基团和吸电子基团的亚甲基和次甲基的仲和叔碳负离子(例如,氯乙酸甲酯,氯乙酸乙酯,氯乙腈,甲基在低温下在氢化钠/ N,N-二甲基甲酰胺体系中的2-氯丙酸酯,2-氯丙酸酯和2-氯丙腈)制得相应的二氢萘[ 2,1- c ]异恶唑N-氧化物3和二氢异异恶唑[4] ,3- f ]喹啉N-氧化物4。另一方面,硝基芳烃1和2与氢化钠/四氢呋喃系统中的仲碳负离子反应,生成相应的常规替代性亲核取代(VNS)产物5和6。
ELTSOV A. V.; ZAXS EH. R.; FROLOVA T. I., ZH. ORGAN. XIMII <ZORK-AE>, 1976, 12, HO 5, 1088-1093