A practical synthesis of 1H-pyrrolo[2,3-c]pyridine-5-carboxylic acid derivatives from pyrrole-2-carboxaldehydes
作者:Mouloud Dekhane、Pierre Potier、Robert H. Dodd
DOI:10.1016/s0040-4020(01)88033-9
日期:1993.9
As part of a study concerning benzodiazepine receptor-ligand interactions, an efficient synthesis of 1H-pyrrolo[2,3-c]pyridine-5-carboxylates (i.e., 6-azaindole-5-carboxylates, 2), structurally related to the highly active β-carboline-3-carboxylates (1), was developed. Thus, condensation of 1-(p-toluenesulfonyl)pyrrole-2-carboxaldehyde (4) and ethyl α-amino-β,β-diethoxypropionate (6) followed by reduction
作为有关苯并二氮杂receptor受体-配体相互作用的研究的一部分,结构上与高度相关的1H-吡咯并[2,3-c]吡啶-5-羧酸盐(即6-氮杂吲哚-5-羧酸盐2)的有效合成开发了活性β-咔啉-3-羧酸盐(1)。因此,将1-(对甲苯磺酰基)吡咯-2-羧醛(4)与α-氨基-β,β-二乙氧基丙酸乙酯(6)缩合,然后还原所得的亚胺键,得到氨基中间体13,其在环中清洁环化。脱毒后2b存在的氯化钛(IV)的存在以准备有用的产量。该途径可能适用于制备多取代的6-氮杂吲哚衍生物。