Tandem Horner–Wadsworth–Emmons/Heck procedures for the preparation of 3-alkenyl-oxindoles: the synthesis of Semaxanib and GW441756
作者:Jana Lubkoll、Alessia Millemaggi、Alexis Perry、Richard J.K. Taylor
DOI:10.1016/j.tet.2010.03.018
日期:2010.8
developed to provide rapid access to 3-alkenyl-oxindoles from α-halo-anilides. This one-pot microwave accelerated process proceeds with catalytic palladium(II) acetate or tetrakis(triphenylphosphine)palladium, and has been used to prepare a range of adducts derivedfrom aromatic, heteroaromatic and aliphatic aldehydes. The procedures can be used to prepare N-unprotected oxindoles directly and the applicability
Syntheses of spiro[cyclopropane-1,3′-oxindole]-2-carboxylic acid and cyclopropa[c]quinoline-7b-carboxylic acid and their derivatives
作者:Sarah R. Yong、Alison T. Ung、Stephen G. Pyne、Brian W. Skelton、Allan H. White
DOI:10.1016/j.tet.2006.11.051
日期:2007.1
The synthesis of spiro[cyclopropane-1,3′-oxindole]-2-carboxylic acid, including novel 3-(2- and 3-pyridyl)-substituted analogues and the novel cyclopropa[c]quinoline-7b-carboxylic acid and their ester and amide derivatives is described. These syntheses involve diastereoselective cyclopropanationreactions of methyl 2-(2-nitrophenyl)acrylate and (3E)-(pyridin-2-ylmethylene)- and (3E)-(pyridin-3-ylmethylene)-1
螺环[环丙烷-1,3'-羟吲哚] -2-羧酸的合成,包括新型的3-(2-和3-吡啶基)取代的类似物以及新型的环丙烷[ c ]喹啉-7b-羧酸及其衍生物描述了酯和酰胺衍生物。这些合成涉及2-(2-硝基苯基)丙烯酸甲酯与(3E)-(吡啶-2-基亚甲基)-和(3E)-(吡啶-3-基亚甲基)-1,3-二氢- 2 H-吲哚-2-酮与乙酸乙酯(二甲基亚硫烷基)乙酸酯(EDSA)。甲基环丙烷的合成[ c]喹啉-7b-羧酸盐涉及硝基二酯前体的区域选择性还原环化。关键化合物的相对立体化学已通过单晶X射线结构分析确定。
Synthesis and cardiotonic activity of pyridylmethylene-2-indolinones
The title compounds were prepared by reaction of 3 2-indolinones with 3 different pyridinecarboxaldehydes. In one case (7b) it was possible to isolate and characterize both the E and Z isomers. In the other cases (except 5b) the E isomer was largely predominant or the only one present. The pharmacological activity of E-7b was not significantly different from that of Z-7b. Compound 6b, arising from the reaction of 5-methoxy-2-indolinone with 3-pyridinecarboxaldehyde, was significantly more active than the other compounds prepared.