公开(公告)号：US3686262A

公开(公告)日：1972-08-22

申请号：US3686262D

申请日：1970-09-15

Applicant: STAMICARBON

Inventor： GROEN SIEMEN H ,  DEUMENS JOHANNES J M

IPC: C07C255/17 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00 ,  C07C255/61 ,  C07C121/02 ,  C07C121/34

CPC classification number: C07C255/00

Abstract: A PROCESS FOR THE PREPARATION OF (2-CYANOETHYL) KETONES BY THE HYDROLYSIS OF THE CORRESPONDING (2-CYANOETHYL)-N-SUBSITUTED KETOIMINE WITH THE SUBSEQUENT RECOVERY OF A PRIMARY AMINE, THE PRIMARY AMINE BOILING AT A LOWER TEMPERATURE THAN WATER AND/OR FORMING WITH WATER AN AZEOTROPE BOILING AT A LOWER TEMPERATURE THAN WATER AND CARRYING ON ITS NITROGEN ATOM THE SAME GROUP AS THAT OF THE NITROGEN ATOM OF THE CORRESPONDING KETOIMINE IS DISCLOSED. WHEN THE RESULTING KETONE IS 5-CYANOPENTANONE-2 THIS MAY BE USED AS A STARTING PRODUCT FOR THE PREPARATION OF A-PIPECOLINE.