CYCLOPENTENONE DERIVATIVE AND PREPARATION THEREOF,申请号JP19890065286-传众专利搜索

CYCLOPENTENONE DERIVATIVE AND PREPARATION THEREOF

申请公布号：JPH02247151(A)

申请号：JP19890065286

申请日期：1989.03.17

申请公布日期：1990.10.02

申请人：

NOGUCHI KENKYUSHO

发明人：TAJIMA MASAHIKO

分类号：B01J31/02;B01J31/04;B01J31/10;C07B61/00;C07C67/475;C07C69/16

主分类号：B01J31/02

摘要：NEW MATERIAL:4,5-Diacetoxy-2-cylopentenone of formula I. USE:A synthetic intermediate for perfumes and medicines. PREPARATION:D-Glucofuranurono-6,3-lactone triacetate of formula II is reacted in the presence of pyridine in acetic anhydride at 80-150 deg.C for 5-30hr and subsequently reacted in the presence of an acid catalyst (e.g. trifluoroacetic acid) in active anhydride at -10-100 deg.C for 0.2-40hr to provide the compound of formula I. The pyridine and the acid catalyst are used in amounts of 1-10 times mol and 5-20 times mol, respectively, that of the compound of formula II. The compound of formula II is prepared by reacting a commercial available D- glucofuranurono-6,3-lactone under a conventional acetylation condition such as active anhydride-pyridine system.