PROCESS OF ASYMMETRIC HYDROGENATION OF KETALS AND ACETALS
申请人:DSM IP ASSETS B.V.
公开号:US20160185683A1
公开(公告)日:2016-06-30
The present invention relates to a process of the asymmetric hydrogenation of a ketal of an unsaturated ketone or an acetal of an unsaturated aldehyde by molecular hydrogen in the presence of at least one chiral iridium complex. This process yields chiral compounds in a very efficient way and is very advantageous in that the amount of iridium complex can be remarkably reduced.
Process for producing 6-methyl-3-hepten-2-one and 6-methyl-2-heptanone analogues, and process for producing phyton or isophytol
申请人:KURARAY Co. LTD.
公开号:EP0816321A1
公开(公告)日:1998-01-07
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.
本发明提供了一种在丙酮、异戊醛和含有碱性物质的水碱中各连续加入一种物质的情况下,通过交叉醛醇缩合反应生产6-甲基-3-庚烯-2-酮的工艺;一种生产由式(1)表示的6-甲基-2-庚酮类似物的工艺:
其中 n 为 0 或 1 或更多的整数;
其中包括允许氢、丙酮和由式(2)代表的醛:
其中 n 如上定义;X 和 Y 各代表一个氢原子或它们耦合在一起形成一个碳-碳键;Z 和 W 各代表一个氢原子或它们耦合在一起形成一个碳-碳键;
在含有碱性物质的水碱和氢化催化剂存在下进行反应;以及使用 6-甲基-3-庚烯-2-酮或 6-甲基-2-庚酮类似物生产植醇或异植醇的工艺。
Process for producing 6-methyl-3-hepten-2-one, and process for producing phyton or isophytol
申请人:Kuraray Co., Ltd.,
Kurashiki Plant
公开号:EP1122236A2
公开(公告)日:2001-08-08
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, and a process for producing phyton or isophytol using the 6-methyl-3-hepten-2-one.