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 MoreWuhan Hanye Chemical New Material Co.,Ltd
Contact:+86-27-85308141
Address:LiuDian, Panlongcheng Economic Development Zone, HuangPi district, Wuhan, Hubei 430311 P.R.China
Contact:86-21-34622192,13917187091,21-34622765
Address:No. 500 Caobao Road Shanghai P.R China
TIANJIN ZHONGXIN CHEMTECH CO.,LTD.
Contact:86-022-89880739
Address:10B, Pan China International Center, No. 931 YingKou Road, TangGu, Tianjin, China, 300451
Contact:86-551-63540590
Address:No 1388 Furong Rd., Hefei, Anhui, China
Nantong Kaixin Pharma Chemical Co.,Ltd.
Contact:86-513-85250786
Address:2-1103 Huachen Mansion, 111 Gongnong Road,Nantong, Jiangsu, 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)