Compounds of formula (la) and pharmaceutically acceptable salts, solvates, and hydrates thereof and related methods of modulatin perforin activity on a cell: wherein Ring A is selected from a 6-10 membered aryl, 5-6 membered cycloalkyi, 5-6 membered heteroaryl or 5-6 membered heterocyclyl, wherein the heteroaryl and heterocyclyl rings comprise at least one heteroatom selected from N, O or S; and wherein the aryl, cycloalkyi, heteroaryl or heterocyclyl rings are optionally substituted with 1 to 3 substituents selected from halo, nitro, -C1-Cealkyl, -C1-Ceaminoalkyl, -C1-C6hydroxyalkyl, -haloC1-C6alkyl, -C1- C6alkoxyl, -haloC1-C
公式(la)的化合物及其药学上可接受的盐、溶剂化合物和水合物,以及相关的调节细胞上穿孔素活性的方法:其中环A选自6-10成员芳基、5-6成员环烷基、5-6成员杂芳基或5-6成员杂环烷基,其中杂芳基和杂环烷基环至少包含N、O或S中的一种杂原子;芳基、环烷基、杂芳基或杂环烷基环可以选择地被1至3个取代基取代,所述取代基选自卤素、硝基、-C1-Ce烷基、-C1-Ceamino烷基、-C1-C6羟基烷基、-卤代C1-C6烷基、-C1-C6烷氧基、-卤代C1-C6烷氧基、杂芳基、芳基、羟基、-C(0)Ci-C6烷基、-OC(0)Ci-C6烷基、-CH2OC(O)CrC6烷基、-C(O)OC1,-C6烷基、-NHC(O)C1,-C6烷基、-NHS(O)2C1-C6烷基、-S(O)2C1-C6烷基、-S(O)2NH2和-C(O)NJJ;环B是6-10成员芳基或5-6成员杂芳基,其中至少包含N、O或S中的一种杂原子;芳基或杂芳基可以选择地被一个或多个取代基取代,所述取代基选自-NJJ、-OJ、卤素、C1-C6烷基、卤代C1-C6烷基、C1-C6烷氧基、卤代C1-C6烷氧基和-C(0)NJJ;环C选自5-10成员杂芳基或5-10成员杂环烯,每个环至少包含N、S和O中的一种杂原子;环D是可选择地取代的苯并9-11成员杂环烷基或可选择地取代的苯并9-11成员杂芳基,其中至少包含N或O中的一种杂原子;L是从支链和非支链C1-C4烷基、-S(0)2-NH-、-C(0)-NH-、-NH-C(0)-NH-、-S(0)2-NH-C(0)-NH-、-S(0)2-NH-C(0) -和-CH=CH-中选取的连接物;其中环B和C,以及环C和D,通过各自环上任何可用的C原子之一的C-C键连接在一起;每次出现的J独立地选自H、可选择地取代的C1-C6烷基或可选择地取代的卤代C1-C6烷基。
An Unusual and Chemoselective Reduction of Ester Grouping in Nsubstituted-3-acetylindoles by Sodium Borohydride
作者:Muvvala Venkatanarayana、Pramod K. Dubey
DOI:10.2174/157017812800167402
日期:2012.3.1
Treatment of 3-acetylindoles 1(a-e) with ethyl chloroacetate in the presence of K2CO3 and tetrabutylammoniumbromide (TBAB) as phase transfer catalyst in DMF, resulted in the formation of the corresponding N-substituted derivatives, ethyl 2-(3-acetyl-1H-indol-1-yl)acetate 2(a-e) which on reaction with NaBH4 yielded, unexpectedly, ethanol derivatives, 1-(1-(2-hydroxyethyl)-1H-indol-3-yl)ethanone 3(a-e) by the unusual and chemoselective reduction of ester grouping in preference to the acetyl group. Alternative synthesis of the latter was achieved by the treatment of 1(a-e) with 2-chloroethanol under phase transfer catalytic conditions (PTC). 1(a-e), on treatment with benzenesulphonyl chloride, under PTC conditions, yielded the corresponding N-benzenesulphonyl-3- acetylindoles 7(a-e), which on reduction with NaBH4 in methanol afforded the corresponding hydroxy derivatives Nbenzenesulphonyl-( α-hydroxyethyl)indoles 8(a-e). These reactions throw light on the ease of reduction of the 3-acetyl group on indoles with NaBH4.
用K2CO3和四丁基溴化铵(TBAB)作为相转移催化剂,在DMF中处理3-乙酰吲哚1(a-e)与氯乙酸乙酯,生成相应的N取代衍生物,即乙基2-(3-乙酰-1H-吲哚-1-基)乙酸酯2(a-e)。这些衍生物与NaBH4反应时,意外地产生了乙醇衍生物1-(1-(2-羟乙基)-1H-吲哚-3-基)乙酮3(a-e),这是因为酯基的还原优先于乙酰基。通过在相转移催化条件(PDC)下用2-氯乙醇处理1(a-e),也能合成后者。1(a-e)在相转移催化条件下与苯磺酰氯反应,生成相应的N-苯磺酰基-3-乙酰吲哚7(a-e),这些化合物在甲醇中与NaBH4还原后得到相应的羟基衍生物N-苯磺酰基-(α-羟乙基)吲哚8(a-e)。这些反应说明了使用NaBH4还原吲哚中的3-乙酰基的简单性。