The present invention is directed to an efficient process for the manufacture of (E)-4-N,N- dialkylamino crotonic acid in HX salt form of formula I, wherein R1 and R2 independently denote C1-3-alkyl groups and Xˉ denotes an acid anion, such as the chloride, bromide, tosylate, mesylate or trifluoroacetate anion, with high quality, and a process for synthesis of EGFR tyrosine kinase inhibitors with heterocyclic quinazoline, quinoline or pyrimidopyrimidine core structure, using the acid addition salt I and activated derivatives thereof as intermediates.
本发明涉及一种高效的(E)-4-N,N-二烷基
氨基
巴豆酸HX盐形式的制造工艺,式I中,R1和R2独立表示C1-3烷基基团,Xˉ表示酸根离子,如
氯离子、
溴离子、tosylate离子、mesylate离子或
三氟乙酸根离子,具有高质量,以及一种使用酸加成盐I及其活化衍
生物作为中间体的杂环
喹唑啉、
喹啉或
嘧啶并
嘧啶酸
EGFR
酪氨酸激酶
抑制剂的合成工艺。