公开(公告)号：DE50005399D1

公开(公告)日：2004-04-01

申请号：DE50005399

申请日：2000-09-21

Applicant: BASF AG

Inventor： SCHEIN DR ,  BALDENIUS DR ,  SIEGEL DR ,  STUERMER DR ,  RUFF DR ,  JAEDICKE DR

IPC: C07B61/00 ,  C07C45/46 ,  C07C49/825 ,  C07C67/42 ,  C07C69/017 ,  C07C69/16

Abstract: Preparation of monoacetylated hydroquinone compound comprises reacting a dicetylphenol compound with peroxo compounds optionally using an acid in one reaction step. Preparation of monoacetylated hydroquinone compound of formula (I) comprises reacting a dicetylphenol compound of formula (II) with peroxo compounds optionally using an acid. R1-R3 = H or Me. Independent claims are included for: (1) preparation of (II) by reacting phenol compounds of formula (III) with an acetylation agent using an acid catalyst; (2) preparation of monoacetylated hydroquinone compounds (I) by reacting (III) with an acetylation agent using an acid catalyst to give (II) and further reacting with peroxo compounds, optionally in the presence of an acid; and (3) compounds of formula (Ia)-(Ie).

公开(公告)号：DE59611228D1

公开(公告)日：2005-06-16

申请号：DE59611228

申请日：1996-06-29

Applicant: BASF AG

Inventor： HARTMANN HORST ,  BURST WOLFRAM ,  KAISER DR ,  LAAS DR ,  GRAFEN DR ,  BOCKSTIEGEL DR ,  BALDENIUS DR

IPC: B01D3/00 ,  B01D3/10 ,  B01D3/14 ,  B01D3/16 ,  B01D3/26 ,  B01D3/32 ,  B01J19/32 ,  C07C17/38 ,  C07D311/72

Abstract: Process to rectify mixts. of high-boiling air and / or temp. sensitive substances requiring a high sepn. efficiency. Process is carried out in a fine vacuum (pref. 0.1-2 mbar) in columns contg. metal fabric packing of an ordered structure. The liq. distribution is carried out by channel distributors with at least 500 drainage points per square metre. The distributor channels are arranged at around 90 degrees to the fabric layers of the packing elements directly under these distributors. Two or more packing elements of height 20-100 mm are inserted below the distributor, whose fabric layers are turned at around 90 degrees to each other. The process is run in the complete absence of air and the rectification is operated strictly adiabatically. Also claimed are columns with output and enhancement sections contg. metal fabric packing for the above process.

公开(公告)号：DE59902329D1

公开(公告)日：2002-09-19

申请号：DE59902329

申请日：1999-12-03

Applicant: BASF AG

Inventor： STUERMER DR ,  BALDENIUS DR

IPC: B65D33/28 ,  C07D309/30 ,  C07D311/66 ,  C07D311/70 ,  C07D407/04

Abstract: Preparation of substituted chroman derivatives in multi-stage process from acrolein-aldehyde starting material via new intermediates. Preparation of substituted chroman derivatives of formula (VII) comprises: (a) reacting an acrolein-aldehyde of formula (I) with an acrylonitrile-, acrolein-, acrolein-acetal-, allyl-alcohol- or allyl ether of formula (II) to give the corresponding 3,4-dihydro-2H-pyran of formula (III); (b) treating (III) with an acid to give the corresponding 5-oxo derivative of formula (IV); (c) reacting this with a substituted vinyl-ketone of formula (V) to give a chromen-6-one of formula (VI); and (d) dehydrating to give (VII). X = CN, COOR3, CHO, CH2OR7 or CH(OR8)2; R1 = 1-4C alkyl, 6-18C aryl, 7-18C aralkyl, optionally halogenated 1-4C acyl or an acid labile hydroxy protecting group; R2 = 1-23C alkyl, 2-23C alkenyl, 6-18C aryl or 7-18C aralkyl; R3 = H, 1-4C alkyl, 1-4C haloalkyl, 1-4C hydroxyalkyl or 1-4C aminoalkyl; R4-R6 = H or 1-4C alkyl; R7 = H or 1-4C alkyl; R8 = 1-4C alkyl; or R8+R8 = 2-6C alkenyl optionally branched and optionally substituted by 1-2 carboxyl, cyclohexyl or phenyl. Independent claims are included for: (1) pyran derivatives (III) as new; (2) preparation of (III) using step (a) as above; (3) tetrahydropyran derivatives (IV); (4) preparation of (IV) using steps (a) and (b) as above; (5) chromen-6-one derivatives (VI); (6) preparation of (VI) using step (c) as above.