Journal of the Chemical Society. Perkin transactions I p. 2352 - 2356 (1981)
Update date:2022-08-05
Topics:
Faragher, Roy
Gilchrist, Thomas L.
Southon, Ian W.
The imidoyl-substituted oxosulphonium ylides (2) reacted with dimethyl acetylenedicarboxylate and with dibenzoylacetylene by conjugate addition.The resulting allylic oxosulphonium ylides underwent <3,2> sigmatropic tearrangement at room temperature or below, to give the sulphoxides (3).These sulphoxides readily lost methanesulphinic acid when heated at 80 deg C, and gave the dihydropyridines (4).These reactions are presumed to go by way of intermediate azatrienes (6).The stabilised oxosulphonium ylides (7) reacted with dimethyl acetylenedicarboxylate by a similar sequence which gave the isolable trienones underwent electrocyclic ring-closure when heated in xylene.
View MoreXinchang Yueding Chemical Co., Ltd.
Contact:86-571-56926323
Address:NO.90 BEIMENCHENGWAI CHENGGUAN TOWN XINCHANG
Shaanxi Lighte Optoelectronics Material Co., Ltd.
Contact:+86-29-88320728-622/619/620
Address:No.55 INDUSTRY ROAD 2,XI'AN NATIONAL CIVIL AEROSPACE INDUSTRIAL PARK.XI'AN China 710065.
Suzhou Ryan Pharmachem Technology Co.,Ltd
Contact:+86-0512-68780025
Address:B-301,No.2 Taishan Road,Suzhou New District,Jiangsu,P.R. China
Nanjing Yuance Industry&Trade Co., Ltd.
website:http://www.njyuance.cn/
Contact:+86-25-85439097
Address:B1702, Aoti Bldg, No. 130, Aoti Avenue, Nanjing, China
ChangZhou Mascotchem. Co.,Ltd.
website:http://www.mascotchem.com
Contact:86-519-85010339
Address:B-802,XingBei Building,391#,Tongjiang Middle Road New District,Changzhou,JS,China
Doi:10.1021/ja00529a053
(1980)Doi:10.1021/ic00132a030
(1982)Doi:10.1002/jlac.198019800105
(1980)Doi:10.1021/ja01476a032
(1961)Doi:10.1021/jo00223a016
(1985)Doi:10.1021/ja01592a039
(1956)
