呋喃并[3,4- c ]吡啶-3-酮的新C 4和C 1衍生物及相关化合物:对组成型蛋白酶体及其免疫同工型进行位点特异性抑制的证据
摘要:
一组18个新的去甲-头孢菌素(1,1-二甲基呋喃[3,4- c ]吡啶-3-一)的C 4和C 1衍生物,6个模型化合物(γ-和δ-内酯)和20个呋喃设计或合成了噻吩并[2,3- d ]-嘧啶-4-one相关化合物。测定每种化合物对20S组成型蛋白酶体(c20S)的CT-L,TL和PA蛋白水解活性的抑制。还可以在20S免疫蛋白酶体(i20S)上分析大多数性能良好的化合物。在呋喃吡啶环的C 4处有苄氨基并在C 1处二甲基化的化合物10是c20S的最有效的PA位点特异性抑制剂(我知道了50每次转化费用600 nM)不会显着抑制i20S PA位点(iPA)。在iPA催化位点的计算机对接分析中,对10个化合物的分析表明,通常在该组成性PA位点(cPA)上没有观察到该化合物及相关位姿。Thieno [2,3- d ]嘧啶-4-酮40具有TL位点特异性,在体外对c20S和i20S均具有轻度抑制作用(我知道了50脂蛋白
Synthesis and some transformations of functionally substituted lactones
作者:A. A. Avetisyan、A. G. Alvandzhyan、T. A. Kostanyan、M. M. Bidar
DOI:10.1134/s1070428011060133
日期:2011.6
Reactions of functionally substituted unsaturated five- and six-membered cyanolactones with α- and β-hydroxy ketones in the presence of sulfuric acid gave substituted 2-oxofuran- and 2-oxopyran-3-carboxamides. Hydrolysis of some keto amides thus obtained afforded the corresponding carboxylic acids, and reactions with hydrazines and semicarbazides led to hydrazones and semicarbazones at the side-chain
α,β-Unsaturated γ- and δ-lactones were selectivity reduced to the corresponding saturated lactones and oxospiro systems respectively using sodiumborohydride in the presence of triethylamine in THF, in excellent yields.
Selective reduction of unsaturated γ- and δ-lactones by magnesium-methanol
作者:M. Bidar、G. Tokmajyan、F. Nasiri
DOI:10.1007/s10600-013-0434-2
日期:2013.1
Magnesium in methanol is an effective reagent for the selectivereduction of α,β-unsaturated γ- and δ-lactones for getting saturated derivatives of these compounds in high to excellent yields. Other reducible functionalities such as -CO2Et and -CN remain unaffected.