The present specification relates to an industrially advantageous process for producing vitamin A derivatives which are useful as medicaments, feed additives, food additives and the like. The process provides vitamin A derivatives, particularly all-trans vitamin A derivatives in high yield and purity.
METHOD OF MANUFACTURING 1-CHLORO-2-METHYL-4-ACYLOXY-2-BUTENE DERIVATIVES
申请人:SHEN Runpu
公开号:US20070270607A1
公开(公告)日:2007-11-22
1-Chloro-2-methyl-4-acyloxy-2-butene derivatives can be synthesized in good yields and high purity starting from isoprene and employing a chlorohydrin formation reaction in a system made of N-chloroisocyanuric acid derivatives and water, followed by esterification and rearrangement of the crude product mixture.