公开(公告)号：DE2547223A1

公开(公告)日：1977-05-05

申请号：DE2547223

申请日：1975-10-22

Applicant: BASF AG

Inventor： BAUMANN MANFRED DIPL CHEM DR ,  HOFFMANN WERNER DIPL CHEM DR

IPC: C07C45/00 ,  C07C45/72 ,  C07C45/74 ,  C07C45/78 ,  C07C45/82 ,  C07C45/85 ,  C07C49/203 ,  C07C49/603 ,  C07C67/00 ,  C07C49/48

Abstract: 2,6,6-Trimethyl-cyclohex-2-en-1-one is manufactured by reacting ethyl isopropyl ketone with acrolein in an organic solvent in the presence of a strong organic acid at from 40 DEG to 150 DEG C.

公开(公告)号：DE2504930A1

公开(公告)日：1976-08-19

申请号：DE2504930

申请日：1975-02-06

Applicant: BASF AG

Inventor： HOFFMANN WERNER DIPL CHEM DR ,  BAUMANN MANFRED DIPL CHEM DR

IPC: C07C45/60 ,  C07C45/66 ,  C07D309/30 ,  C07C49/48

Abstract: A process for the manufacture of 2,6,6-trimethyl-cyclo-hex-2-en-1-one by reacting 3-alkoxy-4-methyl-3-pentene or 3-alkoxy-4-methyl-2-pentene or a mixture of these compounds with acrolein, and reacting the resulting 2-alkoxy-2-ethyl-3,3-dimethyl-2,3-dihydro-4H-pyran with acids. The product is an intermediate for numerous syntheses of scents. Furthermore, a number of carotenoid syntheses are based on 2,6,6-trimethyl-cyclohex-2-en-1-one or its hydrogenation product, 2,6,6-trimethyl-cyclohexan-1-one.