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 Moreshanghai jinshan pharmaceutical Co.,Ltd
Contact:021-57363011，13681638167
Address:No. 7966 Tingfeng Road,Jinshan,Shanghai,China
website:https://www.sinoshiny.com/products
Contact:+86-20-62802632;62802633
Address:Room 330 GIGCAS Building,No.511 Kehua Street,Tianhe District
Contact:
Address:308# dongwu avenue dongxihu district wuhan city
Shandong General Materials Co.,Ltd（Shandong Aoertong Chemical Co., Ltd）
Contact:86-531-88072280
Address:No. 1825 Hualong Road, Licheng District, Jinan, Shandong, China
Suzhou Jingye Medicine & Chemical Co., Ltd
Contact:+86-512-66658588
Address:No. 88, Sanlian Street, Jinfeng Road, Suzhou New District, Jiangsu Province, P. R. China
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)
