Magnetic Resonance in Chemistry p. 696 - 706 (1987)
Update date:2022-08-04
Topics:
Banting, Lee
Crabb, Trevor A.
In contrast to perhydro-oxazolo<3,4-a>pyridine and perhydrothiazolo<3,4-a>pyridine, which adopt equilibria in CDCl3 solution at room temperature containing ca 70percent trans-fused conformers in equilibria with O- or S-inside cis-fused conformers, 2-alkylperhydroimidazolo<3,4-a>pyridines are found to adopt equilibria containing >98percent trans-fused conformers.Comparison of NMR parameters of 2-methylperhydroimidazolo<3,4-a>pyridine with those of the two isomers of 1,2-dimethylperhydroimidazolo<3,4-a>pyridine indicates an equilibrium for the former compound between the two trans-fused conformers, with ca 83percent of that conformation containing a transarrangement of nitrogen lone pairs of electrons.These observations are explained in terms of the generalized anomeric effect.KEY WORDS Perhydroimidazolo<3,4-a>pyridine Conformational equilibria 1H and 13C NMR
View MoreContact:+86-15995924277
Address:WuZhongOu suzhou new south road 89
Liao Cheng All Win Chemicals Co.,LTD
Contact:86+0635-2991582
Address:Room 402,Unit 1,No.27 building.Zhong tong shi dai haoyuan,liaocheng city,Shan dong Province.China
Chemtrade International ( China )
Contact:+86-532-86893005
Address:Rm 2-501, Huaxia Zonghe Building, No. 410 JInggangshan Road, Huangdao
ZHIJIANG ZENVA SINO COMMERCE AND TRADE CO., LTD.
website:http://www.zenvasino.com
Contact:+86-138-72658998
Address:Shibeishan Road,Zhijiang, Hubei, China
Hangzhou Ledun Technology Co.,Ltd.
Contact:86-571-18767088918
Address:No.6 street,XiaSha,Hangzhou,China.
Doi:10.1021/om00097a016
(1988)Doi:10.1016/j.carres.2008.12.015
(2009)Doi:10.1021/jo9001867
(2009)Doi:10.1002/jhet.202
(2009)Doi:10.1002/adsc.201801436
(2019)Doi:10.1016/j.tetlet.2009.02.033
(2009)
