| 摘要 |
PCT No. PCT/EP96/05327 Sec. 371 Date Jun. 9, 1998 Sec. 102(e) Date Jun. 9, 1998 PCT Filed Dec. 2, 1996 PCT Pub. No. WO97/21659 PCT Pub. Date Jun. 19, 1997The invention relates to a process for the condensation of aldehydes or ketones with C-H acidic compounds (in particular Knoevenagel reaction) in the presence of at least one molecular sieve in the form of a zeolite or sheet silicate and one alkali carbonate, alkaline earth carbonate or ammonium carbonate as catalyst system. The products obtained are important intermediates or end products for the perfume industry. |
