申请人:Cosma S.p.A.
公开号:EP2805936A1
公开(公告)日:2014-11-26
The invention relates to one-pot process for preparing (1S,2R)-1-phenyl-1-(N,N-diethylaminocarbonyl)-2-aminomethylcyclopropane of formula (I) comprising the step of reacting (1S,2R)-N,N-diethyl-2-(hydroxymethyl)-1-phenylcyclopropanecarboxamide successively with the following reactants 1) triethyl orthoformate and methanesulfonic acid or triethylamine and methanesulfonyl chloride, 2) a phthalimidating agent, 3) aqueous EtNH2, wherein the reaction is carried out in toluene. In another aspect the invention concerns a process for preparing (1S,2R)-N,N-diethyl-2-(hydroxymethyl)-1-phenylcyclopropanecarboxamide trough a step of crystallization of (1S,5R)-1-phenyl-3-oxabicyclo[3.1.0]hexan-2-one.
本发明涉及制备式(I)的(1S,2R)-1-苯基-1-(N,N-二乙基氨基羰基)-2-氨基甲基环丙烷的单锅工艺,包括以下步骤:将(1S,2R)-N、N-二乙基-2-羟甲基-1-苯基环丙烷甲酰胺先后与下列反应物反应:1)原甲酸三乙酯和甲磺酸或三乙胺和甲磺酰氯;2)邻苯二甲酰亚胺化剂;3)EtNH2 水溶液,其中反应在甲苯中进行。另一方面,本发明涉及一种制备(1S,2R)-N,N-二乙基-2-(羟甲基)-1-苯基环丙烷甲酰胺的工艺,通过(1S,5R)-1-苯基-3-氧杂双环[3.1.0]己-2-酮的结晶步骤制备。