申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20190322605A1
公开(公告)日:2019-10-24
An efficient process for preparing (9E,11Z)-9,11-hexadecadienal of formula (4)
is provided. The process includes at least steps of: conducting a nucleophilic substitution reaction between an (8E,10Z)-8,10-pentadecadienyl magnesium halide derived from an (8E,10Z)-1-halo-8,10-pentadecadiene of (1):
and an orthoformate ester (2)
to thereby prepare a (9E, 11Z)-1,1-dialkoxy-9, 11-hexadecadiene (3):
and hydrolyzing the (9E, 11Z)-1,1-dialkoxy-9,11-hexadecadiene (3) to obtain (9E, 11Z)-9,11-hexadecadienal (4).
提供了一种制备式(4)的(9E,11Z)-9,11-十六烷二烯醛的高效过程。该过程包括至少以下步骤:将来自于(1)的(8E,10Z)-1-卤代-8,10-十五碳二烯制备的(8E,10Z)-8,10-戊二烯基镁卤化物与正甲酸酯(2)之间进行亲核取代反应,从而制备(9E,11Z)-1,1-二烷氧基-9,11-十六烷二烯烃(3),并将(9E,11Z)-1,1-二烷氧基-9,11-十六烷二烯烃(3)水解以得到(9E,11Z)-9,11-十六烷二烯醛(4)。