Tetrahedron Letters p. 8357 - 8360 (1994)
Update date:2022-08-11
Topics:
Staab, Heinz A.
Diehm, Michael
Krieger, Claus
The extension of 'proton sponges' 1 and 2 by further anellation to 1,16-diaza<6>helicene (3) was of interest to define scope and limitation of 'proton sponge' properties. 3 was prepared by photocyclisation of 2,7-bis(3-pyridylvinyl)naphthalene 4 and by Pd-catalyzed aryl-aryl coupling of the corresponding tetrabromo derivative 7.As consequence of the helical structure, 3 does not show 'proton sponge' basicity.X-ray structure analyses of 3 and 3*2HBr are in accordance with these findings.
View More
Tianjin Te-An Chemtech Co., Ltd.(expird)
Contact:+86-22-65378638
Address:A5-8, No.80 Haiyun Street, TEDA
TIANJIN GST CHEMICAL TECHNOLOGY CO., LTD
Contact:+86-22-25210964
Address:Room. 208, No. -12-C, No. 13, Xinbei Road, Tanggu District, New Haixin Area, Tianjin City, China
Jiaozuo Zhongwei Special Products Pharmaceutical Co.,Ltd.
website:http://www.zw-pvp.com
Contact:15302105619
Address:Jiaozuo,Henan,China (Mainland)
Contact:86-607-68073220
Address:1 ave na road jiahua st
Contact:+86-571-86217390
Address:No.567 Dengcai Street,Sandun,Westlake District,Hangzhou310030,Zhejiang,China.
Doi:10.1016/j.bmc.2006.10.057
(2007)Doi:10.1134/S002016850811006X
(2008)Doi:10.1016/S0040-4039(00)01424-6
(1932)Doi:10.1007/BF01145562
(1987)Doi:10.1016/j.bmc.2018.03.037
(2018)Doi:10.1039/b822944a
(2009)
