Synthesis of (E)-3-(2-carboxy-2-pyridyl-vinyl)-4,6-dichloro-1H-indole-2-carboxylic acids, glycine-site NMDA receptor antagonists, utilizing the Knoevenagel condensation reaction
作者:Robert J Cregge、Robert A Farr、Dirk Friedrich、Jos Hulshof、David A Janowick、Scott Meikrantz、William A Metz
DOI:10.1016/s0040-4039(00)02270-x
日期:2001.2
The Knoevenagel condensation of arylacetonitriles with ethyl 4,6-dichloro-3-formyl-1H-indole-2-carboxylate (2), followed by hydrolysis, provides a convenient entry into a series of analogs of MDL 105,519, 1, a selective glycine site N-methyl-d-aspartate (NMDA) receptor antagonist. Surprisingly, the hydrolysis of the indole arylpropenenitriles terminates at the formation of the corresponding carboxamide
arylacetonitriles的Knoevenagel缩合用乙酸乙酯4,6-二氯-3-甲酰基-1- ħ -吲哚-2-羧酸甲酯(2),接着进行水解,提供了方便的入口成一系列MDL 105519,类似物的1,选择性甘氨酸位点N-甲基-d-天冬氨酸(NMDA)受体拮抗剂。令人惊讶地,吲哚芳基丙烯腈的水解终止于相应羧酰胺的形成,并且没有进一步进行为所需的二羧酸。然而,当芳基取代基是吡啶时,水解通过该系列独特的氮杂环庚烷吲哚进行,其在进一步水解时平稳地转化为所需的二羧酸类似物。