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 MoreContact:+ 86 512 52491118
Address:1 Fuyu Road, Haiyu TownChangshu, Jiangsu, China
shijiazhuang shuanglian chemical industry co.,ltd
Contact:0311-82190302
Address:Luquan Intersection , Shijiazhuang--Taiyuan Expressway，Shijiazhuang City
Shandong Xiangde Biotechnology Co., Ltd
Contact:+86 -15066639877
Address:Sanba street
Contact:+86-577-65618087-605
Address:Room 402, Unit 4 Xinhu Bldg. Waitan Ruian City, Zhejiang China.
Chengdu Sino-Strong Pharmaceutical Co.,Ltd.
website:http://www.sino-strong.com.cn
Contact:+86-28-82666753
Address:459 West haike road,Cross-straits technological industry park, Wenjiang district,Chengdu, P.R.China
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)
