The application of vinylogous iminium salts and related synthons to the regiocontrolled preparation of 2,3- and 2,5-disubstituted pyrroles
作者:John T Gupton、Scott A Petrich、Lana L Smith、Marc A Bruce、Phong Vu、Karen X Du、Eric E Dueno、Claude R Jones、James A Sikorski
DOI:10.1016/0040-4020(96)00338-9
日期:1996.5
1-substituted vinamidinium salts with sarcosine ethyl ester produced 2,3-disubstituted pyrroles; a similar reaction with glycine ethyl ester gave 2,5-disubstituted pyrroles. Reactions of related three-carbon synthons with sarcosine and glycine were studied under basic, neutral and acidic conditions which demonstrated the utility of these derivatives for the regiocontrolled preparation of disubstituted pyrroles
An efficient, regiocontrolled synthesis of 5-aryl-2-carbethoxypyrroles from 3-aryl-3-chloropropeniminium salts
作者:John T. Gupton、Dale A. Krolikowski、Richard H. Yu、Vu Phong、James A. Sikorski、Maria L. Dahl、Claude R. Jones
DOI:10.1021/jo00046a033
日期:1992.9
A variety of 3-aryl-3-chloropropeniminium salts react with alpha-amino acid esters under basic conditions to produce 2-carbethoxy-5-arylpyrroles in a regioselective manner. The overall process represents a short, efficient, and convergent synthesis of 2,5-disubstituted pyrroles, and azomethine ylides or azapentadienyl anions may be involved as intermediates.
A new synthesis of pyrroles
作者:Béatrice Quiclet-Sire、Frédérique Wendeborn (née Bertrand)、Samir Z. Zard
DOI:10.1039/b207061h
日期:——
The radical reaction between an N-ethylsulfonylenamide and an α-xanthyl ketone gives an intermediate γ-keto imine which spontaneously ring-closes to the pyrrole.
lymphoma patients prompt continuing efforts to develop new therapeutic strategies. Our previous studies on pyrrole-based anti-lymphoma agents led us to synthesize a new series of twenty-six pyrrolo[3′,4':3,4]cyclohepta[1,2-d] [1,2]oxazole derivatives and study their antiproliferative effects against a panel of four non-Hodgkin lymphoma cell lines. Several candidates showed significant anti-proliferative
复发/难治性淋巴瘤患者的不满意结果促使人们不断努力开发新的治疗策略。我们之前对基于吡咯的抗淋巴瘤药物的研究使我们合成了一系列新的二十六种吡咯并[3',4':3,4]环庚[1,2- d ][1,2]恶唑衍生物和研究它们对四种非霍奇金淋巴瘤细胞系的抗增殖作用。几种候选物显示出显着的抗增殖作用,IC 50在至少一种细胞系中达到亚微摩尔范围,其中化合物3z对整个细胞系表现出亚微摩尔生长抑制作用。 VL51 细胞系最敏感, 3z的 IC 50值为 0.10 μM。 我们早期的研究表明,微管蛋白是我们许多恶唑衍生物的重要靶标。因此,我们检查了它们对微管蛋白组装和秋水仙碱结合的影响。虽然3u和3z似乎不靶向微管蛋白,但观察到3d和3p具有良好的活性。 分子对接和分子动力学模拟使我们能够合理化合成化合物与微管蛋白的结合模式。所有配体都对秋水仙碱位点表现出更好的亲和力,证实了它们对该结合袋的特异性。特别是,