公开(公告)号：DE59801925D1

公开(公告)日：2001-12-06

申请号：DE59801925

申请日：1998-06-02

Applicant: BASF AG

Inventor： TELES JOAQUIM HENRIQUE DR ,  RIEBER DR ,  BREUER DR ,  RIEKER DR ,  DEMUTH DR ,  HIBST PROF DR ,  HAGEMEYER DR

IPC: B01J23/06 ,  B01J37/02 ,  C07B61/00 ,  C07C41/06 ,  C07C41/08 ,  C07C41/54 ,  C07C43/15 ,  C07C43/303 ,  C07C67/04 ,  C07C69/145 ,  C07C69/16

Abstract: Preparation of protected aldehydes and ketones of formulae (I) and (II) comprises addition of alcohols of formula (III) to acetylenes or allenes of formulae (IV) and (V) in the gas phase at elevated temperatures in the presence of a heterogeneous, X-ray amorphic zinc or cadmium silicates. The content of zinc or cadmium, calculated as the oxide, is 1-40 wt.%. The catalyst is prepared by bringing a zinc or cadmium salt and an organic acid (which decomposes at below 400 degrees C) into contact with amorphic silica. Formation of the catalyst takes place at 50-500 degrees C in the presence of an OH-containing compound selected from water, 1-10C alkanols, 2-6C diols or triols or 1-6C carboxylic acids. R1OH (III) (R)2C=C=C(R)2 (V) R1 = H or aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic group or acyl (all optionally containing inert substituents); R = H or aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic groups (which optionally join together to form rings); and m = 0 or 1.