Magnetic Resonance in Chemistry p. 511 - 517 (1988)
Update date:2022-08-05
Topics:
Redondo, Jordi
Sanchez-Ferrando, Francisco
Valls, Montserrat
Virgili, Albert
The 80 MHz 1H NMR and 20 MHz 13C NMR spectra of five 4-methylcoumarins, six 4-methyl-2(1H)-quinolones and nine 3-methylbenzofurans, including six new compounds, were fully assigned.Homonuclear 1H<1H> NOEs and selective heteronuclear 13C<1H> NOEs were measured after low-power pre-saturation of the methyl protons.Indirect, negative heteronuclear NOE enhancements were found in suitable three-spin systems of the 13C-1H-<1H> type, and their magnitude was found to be dependent on ring size.The first examples of indirect, heteronuclear NOE enhancements on non-protonated carbons are described.KEY WORDS Heteronuclear NOE Selective heteronuclear 13C<1H> NOE Indirect negative NOE 13C-1H-<1H> three-spin effects Coumarins 2(1H)-Quinolones Benzofurans.
View MoreJinhua City Mingzhu Pharmaceutical Co.,Ltd.
Contact:15857995878 0579-82207761
Address:No.169 Shenze Road, New Area,Jinpan Development Zone, Jinhua
Jinan Baozhao Pharmaceutical Co., Ltd
Contact:0086-531-86397156 82371858 82371868
Address:Huaneng Road, Jinan, Shandong ,China
website:http://www.np-chem.com
Contact:0086-25-52346877
Address:199, Jian Ye Road, Nanjing, China
Suzhou HeChuang Chemical Co.,Ltd.
Contact:+86-512-88800520
Address:No.9 Guanchao Rd,Changshu Advanced Materials Industy Park
Shanghai Yingrui Biopharma Co., Ltd
Contact:021-3358 8661*8003
Address:shanghai
Doi:10.1021/ja906878q
(2009)Doi:10.1002/asia.200800429
(2009)Doi:10.1016/j.tetlet.2009.08.031
(2009)Doi:10.1021/jo901712x
(2009)Doi:10.1039/b906769h
(2009)Doi:10.1021/acs.orglett.6b01672
(2016)
