公开(公告)号：JPH11315044A

公开(公告)日：1999-11-16

申请号：JP3149699

申请日：1999-02-09

Applicant: BASF AG

Inventor： EIERMANN MATTHIAS ,  EBEL KLAUS DR ,  JOERG BOTZEN

IPC: B01J27/182 ,  C07B61/00 ,  C07C45/52 ,  C07C45/65 ,  C07C45/66 ,  C07C45/67 ,  C07C45/82 ,  C07C49/587 ,  C07C49/593 ,  C07C49/597 ,  C07C49/603 ,  C07C49/607 ,  C25B3/02

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a 2-cycloalkenone by an elimination reaction from an alkoxycycloalkanone or a hydroxycycloalkanone ketal under an acidic heterogeneous catalytic action, capable of simply producing the 2-cycloalkenone in a high yield in one process. SOLUTION: This method for producing a 2-cycloalkenone of formula III comprises subjecting a 2-alkoxycycloalkanone of formula I [(n) is 0-20; (m) is 0-3; R is an alkyl, an alkylaryl, an aryl, an arylalkyl, an alkenyl or an alkynyl; R' is an alkyl, an alkenyl or the like] or 2-hydroxycycloakanone ketal or a mixture of the compound of formula I with the compound of formula II to an elimination reaction in the presence of an acidic heterogeneous catalyst in a gas phase. The acidic heterogeneous catalyst preferably contains at least one oxide or phosphoric salt, or a mixture of the oxide with the phosphoric salt, or the mixed oxides of the groups 3-6 and the groups 13-15 elements in the periodic table.