公开(公告)号：DE50000575D1

公开(公告)日：2002-11-07

申请号：DE50000575

申请日：2000-02-01

Applicant: BASF AG

Inventor： BOTZEM DR ,  JAEDICKE DR ,  JOHN DR ,  PAUST DR

IPC: C07C49/175 ,  C07C237/36 ,  C07C251/08 ,  C07D475/04

公开(公告)号：DE59605774D1

公开(公告)日：2000-09-28

申请号：DE59605774

申请日：1996-05-03

Applicant: BASF AG

Inventor： PAUST DR ,  JOHN DR

IPC: C07C5/22 ,  C07C403/24 ,  C07F9/54

Abstract: Prepn. of beta-carotene with a high 9(Z)-isomer content (formula (I)) is claimed. The 9(Z)- and 9(E) isomers of beta -ionylidenethyl triarylphosphonium salts (formulae II and VI respectively) are sepd. by aq. extn. and crystallisation. (I) may then be obtd. by reacting (II) and (III); or by reacting (II) and (IV) in presence of base to give (V) which is then reacted with (VI) in the presence of base to give (I). X = halide or (HSO4) and Ar = phenyl (opt. substd.). Also claimed is prepn. of (I) by thermal isomerisation of beta-carotene isolated or prepared by known methods.

公开(公告)号：DE50100102D1

公开(公告)日：2003-03-20

申请号：DE50100102

申请日：2001-02-23

Applicant: BASF AG

Inventor： WEGNER DR ,  JOHN DR

IPC: C07F9/54

Abstract: Preparation of triaryl-3,7,11-trimethyldodeca-2,4,6,10-tetraen-1-yl-p hosphonium salts (I) comprises: (1) reacting 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-ol with triarylphosphane and a hydrohalic, sulfuric, sulfonic, phosphoric or 1-6C alkanoic acid at -20 to 40 [deg] C to give 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-yl-phosphonium salt (III); and (2) rearranging (III) at 40-100 [deg] C to form the primary salt (I). Preparation of triaryl-3,7,11-trimethyldodeca-2,4,6-10-tetraen-1-yl-p hosphonium salts of formula (I) comprises: (1) reacting 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-ol with triarylphosphane and a hydrohalic, sulfuric, sulfonic, phosphoric or 1-6C alkanoic acid at -20 to 40 [deg] C to give 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-yl-phosphonium salt (III); and (2) rearranging (III) at 40-100 [deg] C to form the primary salt (I). [Image] R : aryl; and X : the anion of hydrohalic, sulfuric, sulfonic, phosphoric or 1-6 C alkanoic acid.

公开(公告)号：DE59509651D1

公开(公告)日：2001-11-08

申请号：DE59509651

申请日：1995-06-22

Applicant: BASF AG

Inventor： FISCHER DR ,  JOHN DR ,  PINKOS DR

IPC: B01J27/053 ,  B01J27/122 ,  B01J27/14 ,  B01J27/232 ,  B01J31/04 ,  C07B61/00 ,  C07D307/28

Abstract: Method for the prepn. of 2,5-dihydrofurans of formula (I) by the catalytic rearrangement of 3,4-epoxybutene of formula (II) in the liq. phase, in the presence of a novel catalyst comprising one or more copper (I) salts; R1-R6 = H or 1-4C alkyl.