公开(公告)号：US20230391719A1

公开(公告)日：2023-12-07

申请号：US18032881

申请日：2021-10-20

Applicant: ADISSEO FRANCE S.A.S. ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  ECOLE SUPERIEURE DE CHIMIE, PHYSIQUE, ELECTRONIQUE DE LYON ,  UNIVERSITE CLAUDE BERNARD LYON 1

Inventor： Félix TAULOU ,  Didier MORVAN ,  Virginie BELLIERE-BACA ,  Christophe GEANTET

IPC: C07C323/58 ,  C07C391/00

CPC classification number: C07C323/58 ,  C07C391/00

Abstract: The invention concerns a preparation of a compound of formula I,


[Chem 1]



CH3XCH2CH2C(NH2)COOH  (I)



where X represents S or Se,
by catalytic conversion of a compound of formula II






[Chem 2]



CH3XCH2CH2C(Y)CN  (II)



where X represents S or Se and Y represents NH2 or OH,
when Y represents NH2, the conversion being carried out in the presence of water and of at least one catalyst comprising at least alumina, titanium dioxide or a mixture thereof, and
when Y represents OH, the conversion being carried out in the presence of water, of at least one catalyst comprising at least alumina, titanium dioxide, zirconia or a mixture thereof, and NH3 or an ammonium salt.

公开(公告)号：US20240034716A1

公开(公告)日：2024-02-01

申请号：US18032872

申请日：2021-10-20

Applicant: ADISSEO FRANCE S.A.S.

Inventor： Félix TAULOU ,  Didier MORVAN ,  Virginie BELLIERE-BACA ,  Dorothée LAURENTI

IPC: C07C319/20 ,  B01J21/06 ,  B01J27/053 ,  B01J37/20 ,  B01J21/04 ,  B01J35/10 ,  C07C391/00

CPC classification number: C07C319/20 ,  B01J21/063 ,  B01J27/053 ,  B01J37/20 ,  B01J21/04 ,  B01J21/066 ,  B01J35/1004 ,  C07C391/00

Abstract: A method for preparing 2-hydroxy-4-methylthiobutyric acid (HMTBA) or 2-hydroxy-4-methylselenobutyric acid (HMSeBA) by catalytic conversion of 2-hydroxy-4-methylthiobutyronitrile or 2-hydroxy-4-methylselenobutyronitrile, respectively, where said conversion is carried out in the presence of water and at least one weak acid and one catalyst comprising at least one of alumina, titanium dioxide and zirconia.