Process for producing 6-methyl-3-hepten-2-one and 6-methyl-2-heptanone analogues, and process for producing phyton or isophytol
    7.
    发明公开
    Process for producing 6-methyl-3-hepten-2-one and 6-methyl-2-heptanone analogues, and process for producing phyton or isophytol 失效
    一种的制备方法,6-甲基-3-庚烯-2-酮和6-甲基-2-庚酮类似物,以及用于制造植酮异植醇或方法

    公开(公告)号:EP0816321A1

    公开(公告)日:1998-01-07

    申请号:EP97111203.2

    申请日:1997-07-03

    申请人: KURARAY Co. LTD.

    摘要: Provided are a process for producing 6-methyl-3-hepten-2-one by cross aldol condensation carried out while each continuously adding to acetone, isovaleraldehyde and an aqueous alkali containing an alkaline substance; a process for producing a 6-methyl-2-heptanone analogue represented by Formula (1):
    wherein n is an integer of 0 or 1 or more;
    which comprises allowing hydrogen, acetone and an aldehyde represented by Formula (2):
    wherein n is as defined above; X and Y each represents a hydrogen atom or they are coupled together to form a carbon-carbon bond; and Z and W each represents a hydrogen atom or they are coupled together to form a carbon-carbon bond;
    to react in the presence of an aqueous alkali containing an alkaline substance, and a hydrogenation catalyst; and a process for producing phyton or isophytol using the 6-methyl-3-hepten-2-one or the 6-methyl-2-heptanone analogue.

    摘要翻译: 提供了用于制备6-甲基-3-庚烯-2-酮通过的同时进行各连续加入丙酮,异戊醛和碱wässrige在碱性物质含交叉醛醇缩合的方法; 用于制造由式表示的6-甲基-2-庚酮类似物的方法(1): worin n是0或1或更大的整数; 该方法包括在由式使氢,丙酮和醛(2): worin n为如上所定义; X和Y各自darstellt氢原子或联接在一起以形成它们的碳 - 碳键; 和Z和W各自darstellt氢原子或联接在一起以形成它们的碳 - 碳键; 到,在碱wässrige在碱性物质含,和氢化催化剂的存在下反应; 以及用于制造植酮异植醇或使用6-甲基-3-庚烯-2-酮或6-甲基-2-庚酮类似物的方法。

    Process for racemization of optically active 4-phenylbutanoic acid esters
    8.
    发明公开
    Process for racemization of optically active 4-phenylbutanoic acid esters 失效
    4-Phenylbuttersäureestern的Verfahren zur Ra​​cemisierung von optisch aktiven。

    公开(公告)号:EP0421472A1

    公开(公告)日:1991-04-10

    申请号:EP90119178.3

    申请日:1990-10-05

    申请人: KURARAY CO., LTD.

    IPC分类号: C07B55/00 C07C69/73 C07C67/30

    CPC分类号: C07C67/30 C07B55/00 C07C69/73

    摘要: A process for the racemization of optically active 4-phenylbutanoic acid esters which comprises treating optically active 4-phenylbutanoic acid esters of the general formula (I)
    wherein R¹ represents a hydroxy group, a hydroxy group protected by a vinyl ether, or a lower acyloxy group and R² repesents a lower alkyl group with a base selected from the group consisting of alkali metal alcoholates, alkali metal hydrides, and alkali metal amides is provided.

    摘要翻译: 光学活性4-苯基丁酸酯外消旋化的方法,其包括处理通式(I)的光学活性4-苯基丁酸酯其中R 1表示羟基,被乙烯基保护的羟基 乙醚或低级酰氧基,R 2代表低级烷基,碱选择碱金属醇盐,碱金属氢化物和碱金属氨化物。