发明授权
US4089858A Heterocyclic-amino-acrylic acid derivatives 失效
杂环氨基 - 丙烯酸衍生物

Heterocyclic-amino-acrylic acid derivatives
摘要:
The present invention is concerned with the preparation of chemical intermediates, namely, beta-amino-acrylic acid ester derivatives of nitrogen heterocycles, i.e. pyridine, quinoline, quinoxaline, pyrazine, pyrimidine and the like. Said intermediates are cyclized to form pyrido-pyrimidine type final products possessing analgesic activity.
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