Synthesis and Reactivity of New β-Enamino Acid Derivatives: A Simple and General Approach to β-Enamino Esters and Thioesters
摘要:
A new strategy has been developed for the synthesis of several beta-enamino acid derivatives. N,N'-Carbonyldiimidazole has been used as C-acylating agent of methyl ketimines, providing a direct and simple route to new beta-enamino carbonyl imidazole derivatives 2. These derivatives 2 were cleanly and efficiently transformed into beta-enamino esters 4 (X = O) and thioesters 4 (X = S) by reaction with a great variety of alcohols and thiols, including tertiary ones. Alternative and complementary routes to compounds 4 were also investigated. In addition, beta-keto esters 6 have been obtained by mild acid hydrolysis of beta-enamino esters 4.
Synthesis and Reactivity of New β-Enamino Acid Derivatives: A Simple and General Approach to β-Enamino Esters and Thioesters
摘要:
A new strategy has been developed for the synthesis of several beta-enamino acid derivatives. N,N'-Carbonyldiimidazole has been used as C-acylating agent of methyl ketimines, providing a direct and simple route to new beta-enamino carbonyl imidazole derivatives 2. These derivatives 2 were cleanly and efficiently transformed into beta-enamino esters 4 (X = O) and thioesters 4 (X = S) by reaction with a great variety of alcohols and thiols, including tertiary ones. Alternative and complementary routes to compounds 4 were also investigated. In addition, beta-keto esters 6 have been obtained by mild acid hydrolysis of beta-enamino esters 4.
Synthesis and Reactivity of New β-Enamino Acid Derivatives: A Simple and General Approach to β-Enamino Esters and Thioesters
作者:Santos Fustero、Marta García de la Torre、Viviana Jofré,、Raquel Pérez Carlón、Antonio Navarro、Antonio Simón Fuentes、Juan Server Carrió
DOI:10.1021/jo9809480
日期:1998.11.1
A new strategy has been developed for the synthesis of several beta-enamino acid derivatives. N,N'-Carbonyldiimidazole has been used as C-acylating agent of methyl ketimines, providing a direct and simple route to new beta-enamino carbonyl imidazole derivatives 2. These derivatives 2 were cleanly and efficiently transformed into beta-enamino esters 4 (X = O) and thioesters 4 (X = S) by reaction with a great variety of alcohols and thiols, including tertiary ones. Alternative and complementary routes to compounds 4 were also investigated. In addition, beta-keto esters 6 have been obtained by mild acid hydrolysis of beta-enamino esters 4.