Processes for the preparation of hydroquinone and benzoquinone derivatives

摘要

PCT No. PCT/JP94/01230 Sec. 371 Date Dec. 27, 1995 Sec. 102(e) Date Dec. 27, 1995 PCT Filed Jul. 26, 1994 PCT Pub. No. WO95/04044 PCT Pub. Date Feb. 9, 1995Intermediates for the preparation of benzothiazole derivatives useful for the prevention and treatment of diseases for which an inhibitory action against the production of leukotriene and thromboxane is efficacious, and industrially advantageous processes for the preparation of the intermediates. A hydroquinone derivative is condensed with a pyridylcarboxyaldehyde derivative without the protecting the hydroxyl groups of the hydroquinone derivative to form a pyridylmethylhydroquinone derivative, which is further oxidized into a pyridylmethyl-1,4-benzoquinone derivative: <IMAGE> <IMAGE> <IMAGE> +TR <IMAGE>