-
-
公开(公告)号：DE3362532D1
公开(公告)日：1986-04-17
申请号：DE3362532
申请日：1983-06-16
Applicant: DEGUSSA
IPC: C01B15/017
-
-
-
公开(公告)号：DE3360372D1
公开(公告)日：1985-08-14
申请号：DE3360372
申请日：1983-03-10
Applicant: DEGUSSA
Inventor： DRAUZ KARLHEINZ DR DIPL CHEM , KLEEMANN AXEL DR DIPL CHEM , WOLF-HEUSS ELISABETH DR DIPL C
IPC: A01N43/08 , C07C67/00 , C07C253/00 , C07C255/17 , C07C255/31 , C07C255/32 , C07C255/40 , C07C255/45 , C07C255/56 , C07D307/54 , C07D307/68 , C07D333/24 , C07D333/38 , C07C120/00 , C07C121/34 , C07C121/76
Abstract: 3-oxonitriles are produced by reaction of carboxylic acid esters with carboxylic acid nitriles in the presence of 70 to 80% suspension of sodium hydride in white oil. The oxonitrile are intermediate products for the production of 3-oxocarboxylic acid amides or esters and pesticides.
-
Patent Agency Ranking6.发明专利
公开(公告)号：DE3163899D1
公开(公告)日：1984-07-05
申请号：DE3163899
申请日：1981-09-19
Applicant: DEGUSSA
IPC: C07D207/16 , C07D317/30 , C07D319/06 , C07D405/06
Abstract: The invention is directed to cyclic acetals of glutamic acid- gamma -semialdehyde of the formula (I) in which A is an unsubstituted alkylene group having 2 to 3 carbon atoms or such an alkylene group substituted by 1 to 2 methyl groups and to a method of producing a compound of formula (I) by reaction of a compound of the general formula (II) in which A is as defined above with hydrogen cyanide or a cyanide ion supplying compound, ammonia or an ammonium ion supplying compound and carbon dioxide or a carbonate ion supplying compound and basic hydrolysis of the reaction mixture obtained and to using the compound of formula (I) to produce D,L-proline.
-
公开(公告)号：DE3161505D1
公开(公告)日：1983-12-29
申请号：DE3161505
申请日：1981-08-08
Applicant: DEGUSSA
IPC: C07K1/00 , B01J31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/18 , C07K1/02 , C07K1/113 , C07K5/06 , C07C103/52 , C07C102/00
-
公开(公告)号：DE3470515D1
公开(公告)日：1988-05-26
申请号：DE3470515
申请日：1984-01-27
Applicant: DEGUSSA
IPC: C01B15/017
-
公开(公告)号：DE3360230D1
公开(公告)日：1985-07-04
申请号：DE3360230
申请日：1983-09-09
Applicant: DEGUSSA
IPC: C07C227/26 , C07C229/22 , C07C101/30 , C07C99/00
Abstract: beta -hydroxy- alpha -aminocarboxylic acids of the formula: (I) where R1 and R2 are hydrogen or an alkyl group having 1 to 10 carbon atoms are produced by hydrogenating the correspondingly substituted cyanohydrin in a water containing medium first in the presence of a hydrogenation catalyst and an acid at a temperature between -10 DEG and +40 DEG C. and a hydrogen pressure of less than 10 bar, until per mole of cyanohydrogen employed one mole of hydrogen is taken up and then employing the solution obtained as starting material for a Strecker or Bucherer synthesis of an amino acid.
-
公开(公告)号：DE3260844D1
公开(公告)日：1984-10-31
申请号：DE3260844
申请日：1982-10-26
Applicant: DEGUSSA
Inventor： BETHGE HORST , DRAUZ KARLHEINZ DR DIPL CHEM , KLEEMANN AXEL DR DIPL CHEM , MARTENS JURGEN DR DIPL CHEM , WEIGEL HORST
IPC: C07B57/00 , C07B31/00 , C07C67/00 , C07C313/00 , C07C319/28 , C07C323/58 , C07D277/06 , C07H9/06 , C07H15/14 , C07C149/247 , C07B19/00
Abstract: To separate the racemate (R,S)-cysteine, the racemate is condensed in an inert solvent with an enantiomerically enantiomeric monosaccharide of the group of aldoses having 4 to 7 carbon atoms to form the corresponding 2-substituted thiazolidin-4-carboxylic acid and the mixture of diastereomers obtained separated from each other. Subsequently, the isolated unitary diastereomers are reacted in an inert solvent with a carbonyl reagent to split the ring and the enantiomerically pure cysteine in each case is isolated as such or as the corresponding cystine.
-
-
-
-
-
-
-
-
-
Search Results
25
records
(took 0.018 seconds)
