Tetrahedron p. 1437 - 1440 (1981)
Update date:2022-07-29
Topics:
Ahluwalia, V. K.
Arora, K. K.
A novel method of nuclear isoprenylation leading to the exclusive formation of 2,2-dimethylchromans has been achieved by the direct condensation of polyhydroxyacetophenones with isoprene in presence of phosphoric acid.Acetylchromans, thus obtained, are dehydrogenated with DDQ to given corresponding 2,2-dimethylchromenes.Using this method, synthesis of number of naturally occuring chromenes, viz. ripariochromene A (6), eupatoriochromene (10), encecalin (11), isoevodionol (16), evodionol (17) and methylevodionol (18) has been affected.
View Moreshanghai jinshan pharmaceutical Co.,Ltd
Contact:021-57363011，13681638167
Address:No. 7966 Tingfeng Road,Jinshan,Shanghai,China
TIANJIN ZHONGXIN CHEMTECH CO.,LTD.
Contact:86-022-66880623
Address:FINANCIAL STREET WEST BLK 7, #308, NO.52 XINCHENG WEST ROAD, TEDA, TIANJIN, P.R.CHINA
Liaoning Yufeng Chemical Co.,Ltd.
Contact:86-0419-3418888
Address:The metallurgical industrial zone,shoushan town, Liaoyang, Liaoning, China
Taixing Shenfeng Chemical Co., Ltd.
Contact:+86-523-87117033, 87117666
Address:4# Yinsanlu, Huangqiao town, Taixing, Jiangsu, China.
Hangzhou Maytime Bio-Tech Co.,Ltd.
website:http://www.maytime.com.cn
Contact:+86-571-88925295 88920965
Address:NO.2-1701 Ganghui Central Ningwei Street, Xiaoshan Hangzhou Zhejiang China
Doi:10.1021/ja037763h
(2004)Doi:10.1039/c8ob02533a
(2019)Doi:10.1021/jm00288a018
(1971)Doi:10.1016/S0040-4020(01)00940-1
(2001)Doi:10.1016/j.tetlet.2015.12.105
(2016)Doi:10.1002/jhet.5570370614
(2000)
