Process for making polyphenols from ketones or aldehydes and...

Details Process for making polyphenols from ketones or aldehydes and... Process for making polyphenols from ketones or aldehydes and...

C - Chemistry, Metallurgy

07

C

C07C 39/12 (2006.01) B01J 31/02 (2006.01) B01J 31/10 (2006.01) C07C 37/20 (2006.01) C07C 39/367 (2006.01) C07C 41/30 (2006.01) C07C 43/23 (2006.01) C07C 43/295 (2006.01)

Patent

CA 2192192

A catalyst useful for the condensation of an aldehyde or ketone starting material with a phenol is an insoluble mercpatosulfonic acid compound. The heterogeneous catalysts comprise catalytically-active species represented by formula (a). L is an optional linking group and is a bond, which catalytically active species is attached by the bond to an insoluble organic or inorganic support, or a catalytically-active species represented by formula (b), wherein L' is an optional linking group, is a bond and .theta.' and .theta.'' are residues of .theta., and a and b are independently selected from integers equal to or greater than 1.

Un catalyseur utile pour la condensation d'un aldéhyde ou d'une cétone avec un phénol est un composé acide mercaptosulfonique insoluble. Les catalyseurs hétérogènes contiennent un composé actif sur le plan catalytique ayant la formule (a), dans laquelle L est un groupe de liaison facultatif et - est une liaison par laquelle ledit composé actif est fixé à un support insoluble, qui peut être organique ou inorganique. Le composé actif peut également avoir la formule (b), dans laquelle L' est un groupe de liaison facultatif, - est une liaison, .theta.' et .theta." sont des résidus de .theta., et a et b sont choisis séparément parmi des entiers supérieurs ou égaux à 1.

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