
Journal of the Chemical Society. Perkin transactions I p. 336 - 343 (1981)
Update date:2022-08-03
Topics:
Tyman, John H. P.
Grundy, Jesse
Brown, George R.
A number of symmetrical diesters and an unsymmetrical type have been synthesised from pyrocatechol.Under conditions in which intramolecular acyloin formation was anticipated the product from one symmetrical compound, ethyl 4-(o-ethoxycarbonylpropoxyphenoxy)butyrate, was a cyclic bis-β-keto-ester resulting in reasonable yield from intermolecular Dieckmann cyclisation.Hydrolysis to the 9,22 diketone, and its reduction to 7,8,9,10,11,12,20,21,22,23,24,25-dodecahydrodibenzo<1,4,12,15>tetraoxacyclodocosin 'dibenzo-22-crown-4', proceeded smoothly.An unsymmetrical intermediate, methyl 4-(o-ethoxycarbonylmethoxypropylphenoxy)butyrate, was prepared for similar cyclisation and in preliminary experiments appeared to give acyloin and β-keto-ester products.The method represents a different approach to crown ether systems of certain types.
View MoreJiangxi Lanqi Fine Chemical S&T Co., Ltd.
Contact:+86-21-64891143
Address:XinJiShan Industrial Area, Zhangshu City, JiangXi Province, China
JiYi Chemical (Beijing) Co., Ltd.
Contact:+86-10-89385733
Address:Shilou Town of Fangshan District, Beijing
Lonzeal Pharmaceuticals Co., Ltd.
website:http://www.lonzeal.com
Contact:+86-13381011962
Address:RM 801, Yue MOMA, No. 26 Anningzhuang Rd. Haidian District, Beijing, China
Contact:+86-15995924277
Address:WuZhongOu suzhou new south road 89
Tangshan Wisdom Trading Co.,Ltd
Contact:86 315 2222979
Address:No.41 BeiXinXi Road, Yangguang building 1-1102 , Tangshan, Hebei, China
Doi:10.1080/00397911.2010.525333
(2012)Doi:10.1071/CH03252
(2004)Doi:10.1080/15421400490435206
(2004)Doi:10.1016/j.bmcl.2010.12.023
(2011)Doi:10.1002/adsc.201300444
(2013)Doi:10.1246/bcsj.54.2855
(1981)