Process for the preparation of (schiff bases of) alpha-alkyl-alpha-amino acid amides
申请人:——
公开号:US20020072634A1
公开(公告)日:2002-06-13
Process for the preparation of a Schiff base of an &agr;-alkyl-&agr;-amino acid amide and an aldehyde, wherein the corresponding &agr;-aminonitrile is contacted with a base and the aldehyde and wherein it is ensured that the reagents are in good contact. The Schiff base obtained may be further hydrolysed to form the &agr;-alkyl-&agr;-amino acid amide and the aldehyde.
Preferably a substituted or unsubstituted benzaldehyde is used as the aldehyde. The reaction is preferably carried out in a practically homogeneously mixed phase obtained by using a solvent, for example methanol or ethanol. Preferably NaOH or KOH is used as the base.
制备&agr;-烷基-&agr;-氨基酸酰胺和醛的希夫碱的工艺,其中相应的&agr;-氨基腈与碱和醛接触,并确保试剂接触良好。得到的希夫碱可进一步水解形成&agr;-烷基-&agr;-氨基酸酰胺和醛。
醛最好使用取代或未取代的苯甲醛。反应最好在使用溶剂(如甲醇或乙醇)得到的几乎均匀混合相中进行。碱最好使用 NaOH 或 KOH。