Magnetic Resonance in Chemistry p. 246 - 249 (1985)
Update date:2022-08-04
Topics:
Arumugam, N.
Manisankar, P.
Sivasubramanian, S.
Wilson, D. A.
Substituent effects on the 1H and 13C chemical shifts of (Z)-N-(o-hydroxybenzylidene)-p-X-phenylamine N-oxides <(Z)-α-(o-hydroxyphenyl)-N-p-X-phenyl nitrones> and (Z)-N-(2-hydroxy-1-naphthylmethylene)-p-X-phenylamine N-oxides <(Z)-α-(2-hydroxy-1-naphthyl)-N-p-X-phenyl nitrones> have been obtained.A combination of SFDOR and NOE methods was necessary for complete assignment of signals in the naphthalene series.Correlations have been found between the chemical shifts of various protons and carbons and Hammett ? parameters and Swain and Lupton F and R parameters.With both series of compounds a fixed conformation, due to intramolecular hydrogen bonding, is observed which affects the polarity of the nitrone group compared with that in α,N-diphenyl nitrone.Reduced through-resonance between aryl rings via the nitrone function was found.This may be attributed to the α-aryl ring and the nitrone group being held out of coplanarity by the hydrogen bond.
View MoreWuhan Chemwish Technology Co., Ltd
website:http://www.chemwish.com/
Contact:+86-27-67849912
Address:Room 1311, Unit 2, Block1, Innovation Road East Lake High-tech Development Zone Wuhan, Hubei,P.R. China
Tai zhou world Pharm & Chem Co., Ltd
Contact:+86-576-85301198
Address:Rome 1001,wangjiang plaza,unti 2,jinshan east Road linhai,zhejiang,china
Chongqing Acme Tech. Co., Ltd.
Contact:+86-23-89118971
Address:2501 Huachuang Bldg., No.10 Red-yellow Road, Jiangbei
Contact:+86-27-87204219, +86-27-87215023
Address:2402, HuiGu Space-time Building, 8 Forest Road, East Lake Hi-Tech Development Zone
Meryer (Shanghai) Chemical Technology Co., Ltd.
website:http://www.meryer.com/cn/index/
Contact:+86-755-86170518
Address:Minhang,Shanghai, China
Doi:10.1016/j.bmc.2008.04.015
(2008)Doi:10.1016/j.bmc.2008.04.039
(2008)Doi:10.1021/ol801092s
(2008)Doi:10.1002/jhet.5570450302
(2008)Doi:10.1021/jo01065a010
(1961)Doi:10.1016/j.tet.2008.01.060
(2008)