申请人:Lui Norbert
公开号:US08580973B2
公开(公告)日:2013-11-12
A process for the preparation of 2,2-difluoroethylamine, comprising the reaction of 2,2-difluoro-1-chloroethane with an imide of the formula (II)
in the presence of an acid scavenger, to give a compound of the formula (III)
in which, in the compounds of the formulae (II) and (III), R1 and R2 are, each independently of one another, hydrogen or C1-C6-alkyl or R1 and R2 form, together with the carbon atoms to which they are bonded, a six-membered aromatic ring which is optionally substituted; and the cleavage of 2,2-difluoroethylamine by reaction of the compound of the formula (III) with acid, base or hydrazine.
一种制备2,2-二氟乙胺的工艺,包括在酸性清除剂的存在下,将2,2-二氟-1-氯乙烷与式(II)的咪唑反应,以得到式(III)的化合物,在式(II)和(III)的化合物中,R1和R2各自独立地为氢或C1-C6-烷基,或者R1和R2与它们所连接的碳原子形成一个六元芳环,该芳环可选地被取代;以及通过将式(III)的化合物与酸、碱或肼反应来裂解2,2-二氟乙胺。