描述了一种新颖高效的吡啶并[3',2':4,5]吡咯并[1,2- c ]嘧啶系统的合成,该系统是海洋生物碱的variolin家族的杂环核心。该路线涉及3-溴-2-(溴甲基)吡咯并[2,3- b ]吡啶与甲苯磺酰基甲基异氰化物(TosMIC)在相转移条件下的反应。通过TosMIC与溴甲基吲哚,溴甲基苯并咪唑和溴甲基吡唑的反应,该空前的反应还用于合成一系列新的甲氧基羰基氮杂嘧啶。5-溴-7-甲氧基羰基吡啶并[3',2':4,5]吡咯并[1,2- c的水解和脱羧通过该杂环化方法获得的嘧啶嘧啶并在C5位置安装嘧啶部分,这为完成variolin B的全合成提供了另一种方法。
描述了一种新颖高效的吡啶并[3',2':4,5]吡咯并[1,2- c ]嘧啶系统的合成,该系统是海洋生物碱的variolin家族的杂环核心。该路线涉及3-溴-2-(溴甲基)吡咯并[2,3- b ]吡啶与甲苯磺酰基甲基异氰化物(TosMIC)在相转移条件下的反应。通过TosMIC与溴甲基吲哚,溴甲基苯并咪唑和溴甲基吡唑的反应,该空前的反应还用于合成一系列新的甲氧基羰基氮杂嘧啶。5-溴-7-甲氧基羰基吡啶并[3',2':4,5]吡咯并[1,2- c的水解和脱羧通过该杂环化方法获得的嘧啶嘧啶并在C5位置安装嘧啶部分,这为完成variolin B的全合成提供了另一种方法。
Palladium-Catalyzed Arylation and Heteroarylation of Azolopyrimidines
作者:Javier Mendiola、Isabel Castellote、Julio Alvarez-Builla、Javier Fernández-Gadea、Antonio Gómez、Juan J. Vaquero
DOI:10.1021/jo051848e
日期:2006.2.1
A comparative study of the palladium-catalyzed arylation and heteroarylation of 5-bromoazolopyrimidines shows that aryl and electron-rich heteroaryl boronic acids gave higher yields than those obtained using the corresponding aryl and heteroaryl tributyl stannanes. In contrast, the reaction with electron-poor heteroaryl tributyl stannanes gave better results than the corresponding boronic acids.
Reaction of 2-Bromomethylazoles and TosMIC: A Domino Process to Azolopyrimidines. Synthesis of Core Tricycle of the Variolins Alkaloids
作者:Javier Mendiola、José M. Minguez、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1021/ol0062087
日期:2000.10.1
tosylmethyl isocyanide (TosMIC) leading to the preparation of azolopyrimidines is described. This domino sequence was used to synthesize the pyrido[3',2':4,5]pyrrolo[1,2-c]pyrimidine core of alkaloidsvariolins from 4-methoxy-2-methylpyrrolo[2,3-b]pyrimidine in two steps.
A cascade reaction of azolopyrimidines. Synthesis of unusual indole and azaindole derivatives
作者:María Morón、Carolina Burgos、Julio Alvarez-Builla、Antonio Salgado、Marta E. G. Mosquera、Juan J. Vaquero
DOI:10.1039/c2cc34539k
日期:——
amide formation occurs but it is followed by an unexpected cascade process involving attack of the amine to the pyrimidine ring, opening of the pyrimidine ring, loss of the bromine substituent and competitive cyclizations to afford unusual imidazolidene substituted indoles and azaindoles.