Tetrahedron Letters p. 4599 - 4602 (1992)
Update date:2022-08-03
Topics:
Tanaka, Kazuhiko
Osuga, Hideji
Suzuki, Hitomi
Kishida, Hiroshi
(1R,2S,3R,4S)-3-amino-2-hydroxybornane was found to be an efficient chiral auxiliary in the synthesis of functionalized heterohelicenes of high optical purity.Photocyclization of 2-(2-naphtho<2,1-b>thienylvinylene)benzo<1,2-b:4,3-b'>dithiophene-5-carboxamide afforded helicenes as a diastereomeric mixture which was readily separated by column chromatography.Removal of the chiral auxiliary from the diastereomers produced 2-methoxycarbonyl<7>heterohelicene with <α>D -2770 deg and its enantiomer with <α>D +2830 deg, respectively.
View MoreShanghai Taibao Pharmaceutical Technology Co., Ltd(expird)
Contact:021-52217366
Address:shanghai
Chengdu Baishixing Science and Technology Industry Co., Ltd.
website:http://www.cd-bsx.com
Contact:+86-28-88531548
Address:#217,North of Industry Road,Heshan Town,Pujiang County,Chengdu,Sichuan,China.
HENAN NEW BLUE CHEMICAL CO.,LTD
website:http://www.newbluechem.com
Contact:86-371-55170693/55170694
Address:Zhengzhou International Trade New Territory,Jinshui District,Zhengzhou ,China
Tianjin Boron PharmaTech Co.,Ltd.(expird)
Contact:86-022-59845187
Address:B9-401, Tianda Science Park,No.80,4th Avenue,TEDA,Tianjin, China
Contact:+86-25-52346955
Address:199,JIANYE ROAD,NANJING,CHINA
Doi:10.1016/j.tetlet.2013.04.085
(2013)Doi:10.1021/ja5093776
(2014)Doi:10.1111/j.2042-7158.1996.tb07116.x
(1996)Doi:10.1021/om9600452
(1996)Doi:10.1016/0022-328X(93)80046-E
(1993)Doi:10.1039/j39670001959
(1967)
