This invention concerns a new process of preparing optically active .alpha.-arylalkanoic acids and their precursors. These .alpha.-arylalkanoic acids, esters, amides, nitriles, oxazolines and metal salts are stereoselectively prepared by forming the metal or metal halide of the corresponding acid, ester, amide, oxazoline, nitrile, or metal salt and treating the compound so prepared with an aryl halide in the presence of a chiral (optically active) transition metal catalyst of the formula (LL*)QZT wherein Q is a transition metal selected from palladium and nickel; Z and T are independently halogen; and LL* is a chiral tertiary diphosphine compound capable of acting as a bidentate ligand with Q to form a 5-membered ring, optionally in the presence of a dipolar aprotic solvent or mixtures thereof, for a time sufficient to form the corresponding optically active .alpha.-arylalkanoic acid, ester, amide, nitrile, oxazoline or metal salt, and optionally concomitantly or sequentially hydrolyzing any ester, amide, nitrile, oxazoline or metal salt formed to the corresponding optically active .alpha.-arylalkanoic acid. The process optionally further includes removal of halogen atom from the aromatic portion of the .alpha.-arylalkanoic acid. The process optionally includes subsequent formation of the pharmaceutically acceptable salts and esters of the optionally active .alpha.-arylalkanoic acid. This is a simple process for the preparation of the described optically active .alpha.-arylalkanoic acids. These compounds are useful as pharmaceutical (e.g., anti-inflammatory) agents.
这项发明涉及一种制备光学活性α-芳基烷酸及其前体的新工艺。这些α-芳基烷酸、酯、酰胺、腈、
噁唑啉和
金属盐通过形成相应酸、酯、酰胺、
噁唑啉、腈或
金属盐的
金属或
金属卤化物,并在手性(光学活性)过渡
金属催化剂的存在下,将所制备的化合物与芳基卤化物反应,选择性地制备。该过渡
金属催化剂的
化学式为(LL*)QZT,其中Q是从
钯和
镍中选择的过渡
金属;Z和T分别是卤素;LL*是一种手性三膦化合物,能够与Q形成5元环的双齿
配体,可选地在二极性无氢溶剂或其混合物的存在下,在足够时间内形成相应的光学活性α-芳基烷酸、酯、酰胺、腈、
噁唑啉或
金属盐,并可选择性地同时或顺序
水解任何形成的酯、酰胺、腈、
噁唑啉或
金属盐,形成相应的光学活性α-芳基烷酸。该工艺可选地进一步包括从α-芳基烷酸的芳香部分去除卤素原子。该工艺可选地包括随后形成药用可接受的盐和酯的可选择性活性α-芳基烷酸。这是一种简单的制备所述光学活性α-芳基烷酸的工艺。这些化合物可用作药用剂(例如,抗炎药物)。