Title:
MANUFACTURE OF DICHLOROPENTADIENE
Document Type and Number:
Japanese Patent JPS57159728
Kind Code:
A
Abstract:
A process is described for the preparation of 1,1-dichloro-4-methyl- 1,3-pentadiene in which 1,1,1,4- tetrachloro-2-hydroxy-4- methylpentane or an acylated derivative thereof is subjected to selective reductive elimination (e.g. with metal powder or by catalytic hydrogenation) to give 1,1,4-trichloro- 4-methyl-pent-1-ene. The latter is then dehydrochlorinated to give the pentadiene. The tetrachloro starting materials may be prepared by reaction of chloral and isobutylene to give a mixture of 1,1,1-trichloro-2-hydroxy-4-methyl- pent-3-ene and -4-ene; this mixture is then treated with HCl to give the tetrachloro-hydroxy-methylpentane, or treated with HCl and acylated (in either order to give the acylated derivatives.
Inventors:
ZORUTAAN BENDE
ISHIYUTOBUAAN BITSUTERU
JIYORUJII HIDASHIYUI
EEBUA KAARUPAATEI
YOOJIEFU NEMESHIYU
RUDORUFU SHIYOOOSHIYU
RAASUROO TEEKE
ISHIYUTOBUAAN BITSUTERU
JIYORUJII HIDASHIYUI
EEBUA KAARUPAATEI
YOOJIEFU NEMESHIYU
RUDORUFU SHIYOOOSHIYU
RAASUROO TEEKE
Application Number:
JP3668882A
Publication Date:
October 01, 1982
Filing Date:
March 10, 1982
Export Citation:
Assignee:
CHINOIN GYOGYSZER ES VEGYESZET
International Classes:
C07C17/00; C07C17/25; C07C17/361; C07C17/363; C07C21/19; C07C27/00; C07C29/38; C07C29/62; C07C29/64; C07C67/08; C07C31/36; C07C67/00; C07C69/12; C07C69/22; C07C301/00; C07C303/02; C07C303/28; C07C309/63; (IPC1-7): C07C17/34; C07C21/19; C07C29/00; C07C31/125; C07C67/08; C07C69/12; C07C69/22; C07C139/00; C07C143/68