公开(公告)号：JPH05247024A

公开(公告)日：1993-09-24

申请号：JP33283092

申请日：1992-12-14

Applicant: BASF AG

Inventor： RORUFU FUITSUSHIYAA ,  NORUBERUTO GEETSU ,  TOOMASU KIYUUKENHEENAA ,  HARARUTO RUSUTO ,  BUERUNAA SHIYUNUURU

IPC: C07B61/00 ,  C07D309/08

公开(公告)号：JPH0273031A

公开(公告)日：1990-03-13

申请号：JP19542889

申请日：1989-07-29

Applicant: BASF AG

Inventor： KARURESU SHIYOMUMERU ,  KURAUSU EEBERU ,  TOONI DOTSUKUNAA ,  MATSUCHIASU IRUGANGU ,  UORUFUGANGU HERUDERITSUHI ,  HARARUTO RUSUTO

IPC: B01J21/06 ,  B01J23/04 ,  C07B61/00 ,  C07C45/00 ,  C07C45/48 ,  C07C45/74 ,  C07C49/04 ,  C07C49/76 ,  C07C49/792 ,  C07C67/00 ,  C07D213/50

公开(公告)号：JPH01319452A

公开(公告)日：1989-12-25

申请号：JP11401689

申请日：1989-05-06

Applicant: BASF AG

Inventor： UERUNERU SHIYUTETSUKU ,  HERUMUUTO REEMAA ,  HARARUTO RUSUTO ,  GERUHARUTO FURITSUTSU ,  HARUDOO JIIGERU

IPC: B01J29/86 ,  B01J29/40 ,  B01J29/88 ,  C07B61/00 ,  C07C45/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/565 ,  C07C67/00

Abstract: Hydroxybenzaldehydes of the formula (I) are prepared from a benzaldehyde of the formula (II) or its acetal, in which R1 in the R1O-phenyl ether group is an alkyl, cycloalkyl, alkylcycloalkyl or alkylaryl radical, R2 is H or OH or is identical to R1 and one or more R1O-phenyl ether groups are ortho, meta or para to the aldehyde function, by a process in which a benzaldehyde of the formula (II) or its acetal, in which R1 and R2 have the abovementioned meanings and one or more R1O-phenyl ether groups occupy the abovementioned position with respect to the aldehyde function, is converted into a hydroxybenzaldehyde of the formula (I) in the presence of water over a zeolite as a heterogeneous catalyst. The catalysts used are, in particular, zeolites of the pentasil type.