Patents Assigned to Societe d'Expansion Scientifique "EXPANSIA"
  • Preparation of 4-cyano-4'-hydroxybiphenyl
    Patent number: 6160157
    Abstract: The invention relates to a preparation process for 4-cyano-4'-hydroxybiphenyl, said process comprising the protection of the hydroxy group of 4-phenyl-phenol, acylation of the protected 4-phenyl-phenol group, conversion of the resulting ketone into an acid, amidification of the acid thus obtained, dehydration of the resulting amide and deprotection of the hydroxy group.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: December 12, 2000
    Assignee: Societe d'Expansion Scientifique Expansia
    Inventors: Jean-Bernard Cazaux, Christine Le Breton
  • Thienylcyclohexane derivatives for thienylcyclohexyl synthesis
    Patent number: 6107495
    Abstract: Novel thienylcyclohexane derivatives of general formula (I), wherein R' is the 2-thienyl or 3-thienyl radical, R is the cyano radical or a radical of formula --C(O)A, and R2" is a saturated or unsaturated optionally cyclic hydrocarbon radical, or an aryl radical, are disclosed. Methods for preparing said compounds, and the use thereof as novel industrial products for the synthesis of thienylcyclohexyl derivatives, are also disclosed.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: August 22, 2000
    Assignee: Societe d'Expansion Scientifique Expansia
    Inventors: Jean-Bernard Cazaux, Michel Dafniet, Jean-Marc Kamenka, Eric Manginot
  • Preparation of 4-cyano-4'-hydroxybiphenyl
    Patent number: 6046352
    Abstract: The invention relates to a preparation process for 4-cyano-4'-hydroxybiphenyl, the process comprising the protection of the aldehyde function of 4-bromo-benzaldehyde, the reaction of the protected 4-bromo-benzaldehyde with p-alkoxyphenyl magnesium halide, the deprotection of the formyl radical of the protected 4-alkoxy-4'-formyl-biphenyl and conversion of the formyl group into cyano and hydrolysis of the alkoxy group of the resulting 4-alkoxy 4'-cyano-biphenyl.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: April 4, 2000
    Assignee: Societe d'Expansion Scientifique Expansia
    Inventors: Jean-Bernard Cazaux, Christine Le Breton
  • Acrylic copolymers of N-acryloylpolymethyleneimines or N-acryloyldialkylamides, N,N'-acryloyldiaminoalcanes and N-acryloylaminoacids (or esters) their preparation and use as cation exchangers
    Patent number: 4439545
    Abstract: The invention relates to new reticulated statistic acrylic copolymers that may be used in a very wide range of solvents (water, methylene chloride, chloroform, methanol, ethanol, dimethylformamide, pyridine,) stable between pH 1 and pH 14, to preparation process thereof and to their use in ion exchange chromatography.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: March 27, 1984
    Assignee: Societe d "Expansion Scientifique "Expansia"
    Inventors: Christian Aspisi, Bernard Calas, Jacques Daunis, Michel Follet, Robert Jacquier, Joseph Parello
  • Acrylic copolymers and their use in solid phase peptide synthesis
    Patent number: 4436874
    Abstract: The present invention relates to new amino-functionalized acrylic copolymers, their preparation and their use in peptide synthesis.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: March 13, 1984
    Assignee: Societe d'Expansion Scientifique "EXPANSIA"
    Inventors: Christian Aspisi, Bernard Calas, Jacques Daunis, Michel Follet, Robert Jacquier, Joseph Parello
  • Borane complexes
    Patent number: 4436919
    Abstract: This invention relates to new chiral organoboranes of the general formula ##STR1## in which X represents a methylene group or a sulphur atom, n and p are 0 or 1, and to a preparation process of these compounds, consisting in reacting a bicyclic substituted di- or tri-thiane with a borane such as B.sub.2 H.sub.6 or BH.sub.3 : Lewis base.
    Type: Grant
    Filed: March 17, 1982
    Date of Patent: March 13, 1984
    Assignee: Societe d'Expansion Scientifique "EXPANSIA"
    Inventors: Christian Aspisi, Marc Bonato, Robert Jacquier