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公开(公告)号：DE2556525A1
公开(公告)日：1977-06-30
申请号：DE2556525
申请日：1975-12-16
Applicant: BASF AG
Inventor： HIMMELE WALTER DIPL CHEM DR , ROSS KARL-HEINZ DIPL CHEM DR , SCHUSTER LUDWIG DIPL CHEM DR , SEIB KARL DIPL CHEM DR
Abstract: In prepn. of 1,3-dihydroxyacetone esters of formula R1O-ch2-CO-CH2-OR2 (I), 2-methlene-1,3-propanediol esters R1O-CH2-C(=CH2)-CH2-O-COR2 (II) are reacted with ozone and the reaction mixt. formed is reacted with a reducing agent. In formulae (I) and (II), R1 is H or the residue -CO-R3; and R2 and R3 are each H or a (cyclo)aliphatic, araliphatic or aromatic residue. (I) and the dihydroxyacetone into which they can be converted by their basic hydrolysis are useful as intermediates for dyes, pharmaceuticals, plant-protection agents and cosmetics. Dihydroxyacetone is useful as a mild reducing agent for vat dyeing and as an artificial skin-browning agent in cosmetics. The process is simpler and more economical than known chemical methods for the prodn. of dihydroxyacetone (esters).
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公开(公告)号：DE2514001A1
公开(公告)日：1976-10-07
申请号：DE2514001
申请日：1975-03-29
Applicant: BASF AG
IPC: C07C45/40 , C07C47/198 , C07D317/26 , C07D319/06 , C07C47/02
Abstract: Prepn. of glyoxal monacetals of formula (I): (where R1 and R2 are 1-4C aliphatic hydrocarbyl or R1 and R2 together denote an ethylene- or a propylene gp. opt. substd. by 1-4C alkyl, esp. Me) takes place by (a) reacting crotonaldehyde acetals having formula with O3 at - 78 to 0(-40 to -20) degrees C in an organic solvent and then (b) reductively dissociating the ozonolysis prod. (I) are obtd. in very good yields; and hazards of explosion during ozonolysis are prevented by working in organic solvent.
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公开(公告)号：DE2747956A1
公开(公告)日：1979-05-03
申请号：DE2747956
申请日：1977-10-26
Applicant: BASF AG
Inventor： SCHUSTER LUDWIG DIPL CHEM DR , HICKMANN ECKHARD DIPL CHEM DR , HALBRITTER KLAUS DIPL CHEM DR
IPC: C07C37/055 , C07C37/76 , C07C39/14 , C07C37/00
Abstract: Process for the manufacture of alpha -naphthol by hydrolyzing alpha -naphthyl esters of aliphatic carboxylic acids in a distillation column by means of steam in counter-current at a particular temperature, and in a certain ratio, in the presence of naphtholsulfonic acids and/or sulfonic acids of naphthyl esters. The alpha -naphthol obtainable by the process of the invention is a valuable starting material for the manufacture of dyes, drugs and insecticides, e.g. alpha -naphthyl N-methylcarbamate.
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Patent Agency Ranking
公开(公告)号：DE2731815A1
公开(公告)日：1979-02-01
申请号：DE2731815
申请日：1977-07-14
Applicant: BASF AG
Inventor： STUTZ HERBERT DIPL CHEM DR , ILLERS KARL HEINZ DIPL PHYS DR , SCHUSTER LUDWIG DIPL CHEM DR
Abstract: Polyurethane-urea elastomers with improved temperature characteristics, in particular improved low temperature properties, good mechanical properties over a large temperature range and excellent resistance to hydrolysis, are obtained by reacting (A) a prepolymer, possessing cycloaliphatic NCO groups, which has been prepared from essentially difunctional polyhydroxy compounds and organic diisocyanates possessing at least one NCO group bonded to a cycloaliphatic structure, these reactants being used so as to give a ratio of total hydroxyl: NCO groups of from 1:1.2 to 1:10, with (B) 3,3',5,5'-tetramethyl-4,4'-diamino-diphenylmethane, A and B being reacted in the molar ratio of from 1:0.8 to 1:1.2.
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公开(公告)号：DE2642519A1
公开(公告)日：1978-03-23
申请号：DE2642519
申请日：1976-09-22
Applicant: BASF AG
Abstract: Prodn. of tricyclo 5,2,1,02,6 -dec-3-en-9(8)-yl alkyl or alkenyl ethers (I) comprises reacting dicyclopentadiene (II) with an alkanol or alkenol at high temp. in the presence of a strongly acid ion exchanger, esp. one having SO3H groups and pK 1. Pref. 1-12C alkanols or 3-12C alkenols are used. (I) are useful as perfume components providing rooty, fruity and flowery notes. They are also intermediates for aldehydes, amines, carboxylic acids and alcohols. Yields are good and sepn. from the catalyst is easy. In an example, the methyl ether was obtd. in 91% yield on converted (II) using 'Lewatit S100' (RTM) as catalyst.
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16.发明专利
公开(公告)号：DE2513999A1
公开(公告)日：1976-10-07
申请号：DE2513999
申请日：1975-03-29
Applicant: BASF AG
IPC: C07C45/40 , C07C45/49 , C07C47/198 , C07C47/277 , C07D317/20 , C07D317/24 , C07D317/26 , C07D319/06 , C07C47/20
Abstract: Process for prepg. trans-3-methyl-2-butene-1,4-diol-1-acetals of formula (I) comprises (a) ozonolysis of crotonaldehyde acetals (II) in an org. solvent at 0 degree C then reductive elimination to give glyoxal monoacetals which (b) are vinylated in a Grignard reaction then acetylated to give cpds. (III), then (c) (III) are hydroformylated using conventional Rh catalysts at 60-140 degrees C and 20-1500 atm. excess, with CO and H2 and (d) the prod. is subjected to conventional elimination of acetic acid. (R1 and r2 = 1-4C aliphatic hydrocarbyl or together form ethylene or propylene, opt. substd. by 1-4C alkyl, pref. CH3). (I) are inters. in synthesis of carotenoids e.g. reaction with the ylid from beta-ionylideneethyltriphenylphos-phonium salts and subsequent hydrolysis, gives retinal. Process provides (I) in relatively few stages.
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公开(公告)号：DE2432230A1
公开(公告)日：1976-01-29
申请号：DE2432230
申请日：1974-07-05
Applicant: BASF AG
Inventor： SCHUSTER LUDWIG DIPL CHEM DR
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公开(公告)号：DE2357752A1
公开(公告)日：1975-05-28
申请号：DE2357752
申请日：1973-11-20
Applicant: BASF AG
IPC: C07D319/06 , C07C175/00
Abstract: trans-3-Methyl-2-butene-1,4-dial 1-acetals of formula (I) (where R1-R6 are H or 1-4C alkyl, pref. CH3) e.g. 3-methyl-2-butene-1,4-dial 1-(1,3-propylene)-acetal, are prepd. by oxidising a 3-methyl-2-buten-1-al acetal of formula (II) with selenium dioxide in an ether of b.pt. 70-170 degrees C, benzene, an inert alkyl-substd. or halogenated monocyclic aromatic hydrocarbon or a polychlorinated aliphatic hydrocarbon of b.pt. 70-170 degrees C, pref. at 80-120 degrees C for 5-15 mins. using an approximately equimolar amount of selenium dioxide. (I) are useful as intermediates for carotenoids. Thus, Wittig reaction with beta-ionylidene-ethyl-triphenylphosphonium chloride followed by acidic hydrolysis gives retinal, which has vitamin A activity and is also useful as an intermediate for beta-carotene.
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