The discovery and structure—activity relationships of nonpeptide, low molecular weight antagonists selective for the endothelin ETB receptor
摘要:
The systematic modification of the ETA selective N-(5-isoxazolyl)benzene-sulfonamide endothelin antagonists to give ETB selective antagonists is reported. The reversal in selectivity was brought about by substitution of the 4-position with aryl and substituted aryl groups. Of all the aromatic substituents studied, the para-tolyl group gave rise to the most active and selective ETB antagonist. Larger substituents caused a decrease in both ETB activity and selectivity. A similar trend was observed by substitution at the 5-position of the N-(5-isoxazolyl)-2-thiophenesulfonamide ETA receptor antagonists. The para-tolyl group was again found to be optimal for the ETB activity and selectivity. The structural features that were found to be favorable for binding to the ETB receptor, that is, the presence of a linear, conjugated pi-system of definite shape and size, have been successfully incorporated into the design of ETB selective polycyclic aromatic sulfonamides antagonists. (C) 1998 Elsevier Science Ltd. All rights reserved.
with tetralin or an oxygen-containing heterocyclic compound as a N alpha-substituent showed an inhibition with an I50 less than 10(-5) M. N-Monosubstituted derivatives of N alpha-dansyl-L-arginine amide were not hydrolyzed at all by thrombin and were hydrolyzed very slowly by trypsin, and N,N-disubstituted derivatives were not hydrolyzed at all by both enzymes.
制备了一系列具有取代或未取代的萘和杂环化合物作为Nα取代基的Nα-(芳基磺酰基)-L-精氨酸酰胺衍生物,并测试了它们作为凝血酶凝血活性的抑制剂。Nα-丹磺酰基-L-精氨酸酰胺的Nn-丁基和Nn-丁基-N-甲基衍生物对Nα-丹磺酰基-L-精氨酸酰胺的N-烷基和N,N-二烷基衍生物的抑制作用最大。它们的抑制作用与I50为2 X 10(-6)M的Nα-丹磺酰基-L-精氨酸-正丁酯的抑制作用一样。Nα-取代的4-甲基萘他磺酰基-L-精氨酸酰胺衍生物-和4-乙基哌啶也显示出有效的抑制作用,I50为10(-7)至10(-6)M。在该研究中,最有效的抑制作用是1- [Nα-(4,6-二甲氧基萘-2-磺酰基]-精氨酰基] -4-甲基哌啶,I50为7。
Thrombin inhibitors. 3. Carboxyl-containing amide derivatives of N.alpha.-substituted L-arginine
N alpha-(arylsulfonyl)-L-arginine amide derivatives having carboxamide N-substituents with a carboxyl group was prepared and tested as inhibitors of the clotting activity of thrombin. The most inhibitory compounds were obtained when a carboxyl group was introduced into the carbon next to the amide nitrogen of N alpha-(arylsulfonyl)-L-arginine amide derivatives, e.g., N alpha-(arylsulfonyl)-L-arginyl-N-butyl-
制备了一系列具有羧基羧基酰胺N-取代基的Nα-(芳基磺酰基)-L-精氨酸酰胺衍生物,并测试了它们作为凝血酶凝血活性的抑制剂。当在Nα-(芳基磺酰基)-L-精氨酸酰胺衍生物(例如Nα-(芳基磺酰基)-L-精氨酸-N-丁基)的酰胺氮旁的碳原子中引入羧基时,获得最具抑制性的化合物。 -,N-(甲氧基乙基)-或N-(四氢糠基)甘氨酸和4-烷基-1- [Nα-(芳基磺酰基)-L-精氨酰基] -2-哌啶甲酸,I50为1-3 X 10( -7)M.
Synthesis of Aryl Sulfonamides via Palladium-Catalyzed Chlorosulfonylation of Arylboronic Acids
作者:J. Robb DeBergh、Nootaree Niljianskul、Stephen L. Buchwald
DOI:10.1021/ja405949a
日期:2013.7.24
A palladium-catalyzed method for the preparation of sulfonamides is described. The process exhibits significant functional group tolerance and allows for the preparation of a number of arylsulfonyl chlorides and sulfonamides under mild conditions.
The discovery and structure—activity relationships of nonpeptide, low molecular weight antagonists selective for the endothelin ETB receptor
作者:Ming Fai Chan、Adam Kois、Erik J. Verner、Bore G. Raju、Rosario S. Castillo、Chengde Wu、Ilya Okun、Fiona D. Stavros、V.N. Balaji
DOI:10.1016/s0968-0896(98)80010-2
日期:1998.12
The systematic modification of the ETA selective N-(5-isoxazolyl)benzene-sulfonamide endothelin antagonists to give ETB selective antagonists is reported. The reversal in selectivity was brought about by substitution of the 4-position with aryl and substituted aryl groups. Of all the aromatic substituents studied, the para-tolyl group gave rise to the most active and selective ETB antagonist. Larger substituents caused a decrease in both ETB activity and selectivity. A similar trend was observed by substitution at the 5-position of the N-(5-isoxazolyl)-2-thiophenesulfonamide ETA receptor antagonists. The para-tolyl group was again found to be optimal for the ETB activity and selectivity. The structural features that were found to be favorable for binding to the ETB receptor, that is, the presence of a linear, conjugated pi-system of definite shape and size, have been successfully incorporated into the design of ETB selective polycyclic aromatic sulfonamides antagonists. (C) 1998 Elsevier Science Ltd. All rights reserved.