An extremely short synthesis of benzoylpyrrole-type calcium channel activators
作者:Christopher R. Dalton、John M. Kane、David Rampe
DOI:10.1016/0040-4039(92)89013-3
日期:1992.9
Friedel-Crafts acylation of methyl 2,5-dimethylpyrrole-3-carboxylate with 2-chloromethylbenzoyl chloride generated the corresponding 4-(2-chloromethylbenzoyl)pyrrole which was reacted in situ with benzene and aluminum chloride to yield the novel calcium channel activator FPL 64176.
Identification of a 4<i>H</i>-benz[<i>f</i>]indole by-product from the friedel-crafts-based synthesis of benzoylpyrrole calcium channel activators
作者:Edward W. Huber、Robert J. Barbuch、Christopher R. Dalton、John M. Kane、Nelson L. Velayo
DOI:10.1002/jhet.5570300305
日期:1993.5
9,9a-Dihydro-2,9a-dimethyl-4-oxo-4H-benz[f]indole-3-carboxylic acid, methyl ester was formed in varying amounts from the Friedel-Crafts-based synthesis of benzoylpyrrole calcium channel activators. The structure of this by-product was determined using two-dimensional long-range 1H-13C heteronuclear correlated and INADEQUATE nmr techniques.
由基于Friedel-Crafts的苯甲酰基吡咯钙通道活化剂的合成,形成了9,9a-二氢-2,9a-二甲基-4-氧代-4 H-苯并[ f ]吲哚-3-羧酸甲酯。 。使用二维远程1 H - 13 C异核相关和INADEQUATE nmr技术确定该副产物的结构。
Synthesis of [3H]FPL 64176, a potent calcium channel activator
作者:Christian Foged、Peter Madsen
DOI:10.1002/jlcr.2580340710
日期:1994.7
Tritium labelled FPL 64176 (1, methyl 2,5-dimethyl-4-2-(phenylmethyl)benzoyl]-1H-pyrrole-3-carboxylate), a potent calcium channel activator with insulinotropic properties was synthesized from the corresponding bromo derivative (3) using tritium gas and Pd/C catalyst. (3) was in turn prepared from methyl 2,5-dimethylpyrrole-3-carboxylate (4) in a one pot procedure. The specific activity of [3H]FPL 64176 was 38 mCi/mmol and radiochemical purity >98%.