Journal of the Chemical Society. Perkin transactions I p. 178 - 181 (1981)
Update date:2022-07-30
Topics: Magnesium Methoxide
Baker, S. Richard
Crombie, Leslie
Using the pyrone melt procedure of the preceding paper, 3,3',5,5'-tetrakismethoxycarbonylglaucyrone (2) and the tautomerically unsymmetrical 3'-acetyl-3,5,5'-trimethoxyglaucyrone (5) have been prepared.Conditions can be adjusted to prevent complete ester exchange in the reactin of 3,3'-diacetyl-5,5'-bisethoxycarbonylglaucyrone (1) with excess of magnesium methoxide, in accord with the mechanism proposed.On reaction with the latter reagent, the two new glaucyrones give aromatic penta-esters (11) and (14), and their mechanisms of formation are discussed.Heating these penta-esters effects cyclisation to xanthyrones having aromatic side-chain termini, (13) and (16), respectively.
View MoreTianjin Pharmacn Medical Technology Co.,Ltd.
Contact:86-22-60122566ext.866(English),23359620
Address:Green Industrial Base, 6 Haitaifazhan Sixth Rd., Huayuan Industrial Area, Tianjin, 300384, China
Shanghai Yuanding Chem. Sci. & Tech. Co., Ltd.
website:http://www.shydtec.com
Contact:86-21-57721279
Address:Science and Technology Park, Songjiang District, Shanghai, China
Beijing Century Richap Chemistry Co.,Ltd
Contact:+86- 010-64455497
Address:Guannan County, Lianyungang City, Jiangsu Province, China
Contact:(86) 731 88718666
Address:Room 1222, Unit 4, Building B, Shangcheng, No.47, Kaiyuan East Road.
Contact:0086-357-6662688
Address:Zhaocheng town, Hongtong County, Linfen City, Shanxi Province
Doi:10.1080/10587250108023995
(2001)Doi:10.1002/jhet.5570320250
(1995)Doi:10.1021/jo00043a015
(1992)Doi:10.1021/acs.joc.7b02987
(2018)Doi:10.1016/j.tetlet.2016.10.051
(2016)Doi:10.1021/jo00822a041
(1971)
