Fremgangsmåde til fremstilling af 1,4-benzoquinoner

摘要

A method for producing a compound of the formula: [wherein R<1> and R<2> each stand for a lower alkyl group; n denotes an integer of 0 to 21; X stands for hydrogen atom or an optionally protected hydroxyl group; and Y stands for an optionally protected hydroxyl group], which comprises by reducing an ester compound of the formula: [wherein R<1>, R<2>, n, X and Y are of the same meaning as defined above, and R<3> stands for a lower alkyl group] with a mixture of sodium borohydride and aluminum chloride, gives the desired compound in a high yield, and is advantageous from the industrial point of view.