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
website:http://www.NEM.COM.CN
Contact:+86-393-4411771
Address:The west section of shengli Road,Puyang,Henan Province,China
Contact:+86-27-85733560
Address:NO.308,QINGNIAN RD.,WUHAN,CHINA
Contact:+86-0311-84455288-844
Address:Mayu Industrial Park, Jinzhou, Hebei, China.
Naturalin Bio-Resource Co., Ltd
website:http://www.naturalin.com
Contact:+86-0731-84430651
Address:B1-402, Lu-Valley Enterprise Square.No.27 Wenxuan Road. Lu-Valley Hi-Tech District.
Contact:+33-5-34012600
Address:28 ZA des Pignès
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)
