Silica gel incorporating polyazacycloalkane units comprising more than six nitrogen atoms, preparation process and use

US6534649B1 · kind B1 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Franck Denat · Dijon, FR
• Geraud J. Dubois · Los Altos, US
• Raphaël Tripier · Landerneau, FR
• Roger Guilard · Talant, FR
• Bruno Roux-Fouillet · Dijon, FR

Key dates

• Filing date: Jul 24, 2000
• Grant date: Mar 18, 2003
• Expiry date: Jul 24, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/18
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compound of formula (I): in which W1, W2 and W3, which are identical or different, each represent, independently of one another, a divalent radical chosen from those represented by the general formula (A):—[(CT5T6)a—(CT1T2)n—[N(R4)]p—(CT3T4)m—(CT7T8)b]1—  (A)as defined in the description and in which R4 represents a hydrogen atom, an alkyl radical, a [(hetero)aryl]alkyl radical or a radical represented by the general formula (B), R5—Si(X1) (X2) (X3), as defined in the description, and R1, R2 and R3, which are identical or different, each represent, independently of one another and of R4, a hydrogen atom, an alkyl radical, a [(hetero)aryl]alkyl radical comprising from 7 to 12 carbon atoms or a radical represented by the general formula (B), it being understood that the compound of formula (I) comprises more than six cyclic nitrogen atoms.