申请人:——
公开号:US20020183565A1
公开(公告)日:2002-12-05
Higher &agr;,&bgr;-unsaturated alcohols are prepared by monoethynylation of a ketone by the NH
3
/KOH method, if desired hydrogenation of the acetylene alcohol in the presence of hydrogen over a Pd-containing thin layer catalyst, purifying distillation of the hydrogenation product, preferably in a dividing wall column with recirculation of the unreacted ketone to the ethynylation step, and, if desired, preparation of higher alcohols having in each case 5 more carbon atoms in the chain by reacting the alcohols prepared by monoethynylation and, if desired, partial hydrogenation with alkyl acetoacetatesor diketene in a Carroll reaction to form ketones and using these as starting materials for the steps ethynylation, optional hydrogenation and fractional distillation.
高级α,β-不饱和醇通过NH3/KOH方法对酮进行单乙炔基化制备,如有需要,在Pd含量薄层催化剂存在下,对乙炔醇进行加氢反应,纯化加氢产物的蒸馏,最好在带有循环未反应酮的分隔壁柱的条件下进行,然后,如有需要,通过将通过单乙炔基化制备的醇与如有需要的部分加氢后的醇与烯丙酮酸酯或二酮在Carroll反应中反应,形成酮,并将其用作乙炔基化、可选加氢和分馏步骤的起始原料,制备具有每个链中5个以上碳原子的高级醇。