In the presence of molecular sieve (MS) 4 Å in DMF, a catalyst-free aldol condensation of a variety of aromatic and aliphatic ketones with isatins under mild reaction conditions has been developed. This approach may provide access to a wide range of 3-substituted-3-hydroxyindolin-2-ones in good to excellent yields.
“On water” catalytic aldol reaction catalyzed by polyetheramine (D230) has been developed for easy access to 3-substituted 3-hydroxyindolin-2-ones through the reaction between various substituted isatins and acetophenones/cyclic ketones in high yields under room temperature. Systematic mechanism investigation uncovers the secret for the on water catalytic aldol reaction: comparison of the heterogeneous
已经开发了通过聚醚胺(D230)催化的“水上”催化醛醇缩合反应,可通过在室温下高产率地使各种取代的靛红与乙酰苯/环酮之间的反应轻松获得3-取代的3-羟基吲哚-2-酮。系统的机理研究揭示了水催化醛醇缩合反应的奥秘:比较异构反应和均相反应的情况,产率分别为95%和20%,表明水上反应占主导。当将水添加到CDCl 3中时,基于C2和C3的13 C NMR信号的下场位移,测试了isatin与H 2 O之间的界面氢键靛红溶液;路易斯碱聚醚胺D230通过烯胺机制催化醛醇缩醛反应,该机制已通过原位NMR和ESI-MS分析验证。
Hit optimization studies of 3-hydroxy-indolin-2-one analogs as potential anti-HIV-1 agents
In the current study, twenty-two compounds based upon 3-hydroxy-3-(2-oxo-2-phenylethyl)indolin-2-one nucleus were designed, synthesized and in vitro evaluated for HIV-1 RT inhibition and anti-HIV-1 activity. Compounds 3d, 5c and 5e demonstrated encouraging potency against RT enzyme as well as HIV-1 in low micromolar to nanomolar concentration with good to excellent safety index. Structure activity