| 摘要 |
<p>A method for producing a compound of formula (I) (wherein R?1 and R2¿ 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 formula (II) (wherein R1, R2, n, X and Y are of the same meaning as defined above, and R3 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.</p> |
