Journal of Medicinal Chemistry p. 96 - 100 (1989)
Update date:2022-07-29
Topics:
Pitha, Josef
Szabo, Lajos
Szurmai, Zoltan
Buchowiecki, Wieslaw
Kusiak, John W.
A series of prazosin analogues comprised of N-acyl derivatives of N'-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperazine was prepared and the nature of their binding to α1-adrenoceptors was investigated.Derivatives with α,β-unsaturated acyclic acyls had some affinity but no irreversible action at the receptor.Other potent compounds, also without irreversible activity, contained cinnamoyl or (phenylamino)thiocarbonyl residues.High affinity and irreversible binding were obtained with a bicyclo<2.2.2>octa-2,5-dien-2-ylcarbonyl derivative.The conjugated double bond in this compound was in about the same position and distance from the pharmacophore as in some of the above compounds of high affinity but with no irreversible action.Two consecutive recognition steps were thought to be involved in irreversible blockade: reversible binding of the pharmacophore part of the molecule to the binding site of the receptor, followed by reaction of the chemoreactive part with an adjacent nucleophile of the receptor.The present results suggest that for the second step to occur efficiently, some affinity for the receptor must be present even in the chemoreactive part of the molecule; simple spanning of the binding and nucleophile sites of the receptor was insufficient.
View MoreContact:(86) 731 88718666
Address:Room 1222, Unit 4, Building B, Shangcheng, No.47, Kaiyuan East Road.
Contact:+86-512-69561895
Address:No.111, Building A4, 218 Xinghu Street, Suzhou Industrial Park, P. R. China
website:http://www.dulynet.com/
Contact:025-84699383 -8003
Address:Room 503, Building 2, Chuangxinhui, No. 61 Wenjing Road, High-tech Development Zone, Pukou District, Nanjing City, Jiangsu Province Nanjing, Jiangsu
Contact:+86-571-28186845
Address:Room 1224,Eastcom Mansion,398 Wensan Road,Hangzhou,310013 China
Shanghai shibo Chemical Co., Ltd
Contact:+86-021-60753516
Address:688 Qiushi Road, Jinshan High-tech Park, Shanghai, China,201512
Doi:10.1021/jm00169a037
(1990)Doi:10.1021/ja904241r
(2009)Doi:10.1007/s00706-008-0060-z
(2009)Doi:10.1021/jo000039m
(2000)Doi:10.1016/j.bmc.2009.04.060
(2009)Doi:10.1021/jo00264a025
(1989)