Ligand, method for producing the same, and catalyst using...

C - Chemistry – Metallurgy – 07 – F

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C07F 9/53 (2006.01) B01J 31/24 (2006.01) B01J 37/28 (2006.01) C07C 67/333 (2006.01) C07C 69/757 (2006.01) C07C 227/04 (2006.01) C07C 229/08 (2006.01) C07C 253/08 (2006.01) C07C 255/46 (2006.01) C07D 207/325 (2006.01) C07F 3/00 (2006.01) C07F 5/00 (2006.01)

Patent

CA 2644665

Disclosed is a novel asymmetric ligand which can be synthesized by a short process at low cost and is capable of exhibiting higher catalytic activity and enantioselectivity than the conventional ligands derived from sugars. Also disclosed are a method for producing such an asymmetric ligand, and a catalyst using such an asymmetric ligand. Specifically disclosed is a ligand represented by the general formula I below or the like. (In the formula, R1 and R2 independently represent 0-5 substituents; X represents P, As or N; m represents an integer of 0-7; n represents an integer of 0-3; A1-A4 independently represent hydrogen, fluorine, chlorine, bromine, benzoyl or acetyl, or alternatively A2 and A3 combine together to form a ring.)

La présente invention concerne un nouveau ligand asymétrique qui peut être synthétisé par un court procédé à faible coût, et qui est susceptible de présenter une activité catalytique et une énantiosélectivité supérieures à celle des ligands classiques dérivés des sucres. La présente invention concerne également une méthode de production d'un tel ligand asymétrique, ainsi qu'un catalyseur utilisant un tel ligand asymétrique. La présente invention concerne spécifiquement un ligand de formule générale I ci-dessous, ou similaire. (Dans la formule, R1 et R2 représentent indépendamment 0 à 5 substituants ; X représente P, As ou N ; m représente un entier compris entre 0 et 7 inclus ; n représente un entier compris entre 0 et 3 inclus ; A1-A4 représentent indépendamment un atome d'hydrogène, de fluor, de chlore, de brome, ou un groupement benzoyle ou acétyle, ou, en variante, A2 et A3 se combinent pour former un cycle.)

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