Tetrahedron p. 749 - 756 (1984)
Update date:2022-08-05
Topics:
Maio, G. Di
Vecchi, E.
Zeuli, E.
Delfini, M
Alkylation of methyl 4-methyl 5-oxo 5-phenyl (m and p-X substituted) pentanoates 1a-h give cis and trans tetrahydro 5,6-dimethyl 6-phenyl 2H pyran-2-ones.LFER of isomer ratios as function of the X substituent on the phenyl ring is seen in MeLi-Et2O.The lactone ratios of the reactions in THF with MeMgCl are not affected by the X phenyl substituent, while a more complex situation is showed by reactions of MeMgCl in Et2O and benzene.Changes in the cis: trans-ratios with variations in reactant and solvent are discussed in terms of equilibrium between folded and unfolded conformations in transition states.
View MoreContact:+86-13666670345
Address:Agricultural Development Zone, Haining, Jiaxing, Zhejiang
SHANGHAI SYSTEAM BIOCHEM CO., LTD
website:http://www.systeambc.com
Contact:86-021-58380978
Address:Building 87，Lane 669， Dong Jing Road Shanghai,P.R.China
Nantong Auxin Electronic Technology Co., LTD
Contact:86-513-88760026
Address:NO.5-1, Aoxin Road, Haian Hi-tech Development Zone, Jiangsu Province, China
Jiangsu Jiuri Chemical Co.,Ltd.
Contact:+86-519-82118868
Address:Tianwang Town, Jurong City, Jiangsu Province, China
Heliosense Biotechnologies, Inc.
Contact:+86-592-5667290
Address:Xiamen Torch Hi-tech Zone Venture Weiye Building S506
Doi:10.1051/epjap:2000113
(1918)Doi:10.1016/j.tet.2005.04.051
(2005)Doi:10.1021/ja00354a046
(1983)Doi:10.1021/ol051126+
(2005)Doi:10.1016/j.farmac.2004.07.014
(2004)Doi:10.1021/jo00164a018
(1983)
