Journal of the Chemical Society. Perkin transactions I p. 64 - 72 (1981)
Update date:2022-07-30
Topics:
Cheung, H.T. Andrew
Coombe, Reginald G.
Sidwell, William T. L.
Watson, Thomas R.
Afroside (2) has the same carbohydrate as gomphoside (1), namely a 4,6-dideoxyhexosulose doubly linked to the aglycone at the 2α and 3β positions.It differs from gomphoside in having a 15β-hydroxy-group, the location of which is shown by n.m.r. (1H and 13C) and mass spectra, and is established by the formation of a 14,15-cyclic carbonate derivative (2e).The 14β,15β-diol group shows unusual inertness to glycol cleavage and to OO-isopropylidene derivative formation, in contrast with the behaviour of the 2',3'-diol in the carbohydrate, and the 2α,3β-diol in the genin, afrogenin (4).Degradation of the carbohydrate in afroside gave afrogenin (4), and 'anhydroafrogenin' (9) which is a 15-ketone with 14α-H.The conformation of the highly crowded ring D is studied using 1H and 13C n.m.r.
View MoreShanghai Yuking Water Soluble Material Tech Co., Ltd
Contact:86-21-68286299
Address:4F, 13B, No. 600, South Xinyuan Road 201306, Shanghai, China
Taixing Shenfeng Chemical Co., Ltd.
Contact:+86-523-87117033, 87117666
Address:4# Yinsanlu, Huangqiao town, Taixing, Jiangsu, China.
Taixing Joxin Bio-tec Co.,Ltd.
website:http://www.joxbio.com
Contact:86-523-87558858 87612088
Address:No.88, chengdong industrial park
AllyChem Co., Ltd., Dalian, China（BBChem）
Contact:+86-411-62313318/62313328
Address:No.5 of Jinbin Road, Jinzhou New District, Dalian City, Liaoning Province, P.R.China
VanderArk International Limited
Contact:86-10-82437576
Address:Qing He
Doi:10.1016/S0040-4020(98)00011-8
(1998)Doi:10.1021/jo01215a002
(1939)Doi:10.1021/jo0265737
(2003)Doi:10.1039/a706746a
(1998)Doi:10.1016/S0960-894X(98)00003-1
(1998)Doi:10.1002/jhet.5570350128
(1998)
