Asymmetric synthesis of alpha-substituted-alpha-cyanomethyl alcohols
申请人:ICI AUSTRALIA LIMITED
公开号:EP0132392A2
公开(公告)日:1985-01-30
The invention concerns a process for the preparation of an a-substituted-a-cyanomethyl alcohol enantiomer of formula 1
wherein the group R1 is an alkenyl, alkynyl, aryl or heteroaryl group by reacting an aldehyde of formula II
with hydrogen cyanide in the presence of a cyclic dipeptide enantiomer at a temperature below ambient temperature.
The process enables the preparation of compounds of formula I in high yield and high enantiomeric excess. The enantiomers of formula I may be used as intermediates fortheprepara- tion of chiral pyrethroids and chiral arylethanolamines.
The invention also embraces cyclic dipeptide enantiomers, processes for the preparation of chiral pyrethroids and chiral arylethanolamines from a-substituted-a-cyanomethyl alcohol enantiomers of formula I and chiral pyrethroids and chiral ethanolamines and the chiral pyrethroids and chiral ethanolamines prepared thereby.
本发明涉及一种制备式 1 的 a-取代-a-氰基甲醇对映体的工艺,其中基团 R1 是烯基、炔基、芳基或杂芳基。
其中基团 R1 为烯基、炔基、芳基或杂芳基。
在低于环境温度的条件下,在环状二肽对映体存在的情况下,使式 II 的醛与氰化氢反应。
该工艺可制备高产率和高对映体过量的式 I 化合物。式 I 的对映体可用作制备手性拟除虫菊酯和手性芳基乙醇胺的中间体。
本发明还包括环二肽对映体、从式 I 的 a-取代-a-氰基甲醇对映体制备手性拟除虫菊酯和手性芳基乙醇胺的工艺、手性拟除虫菊酯和手性乙醇胺以及由此制备的手性拟除虫菊酯和手性乙醇胺。
(57) [小结] Ϯn [问题] 3-苯氧基苯甲醛与氰化氢在反应溶剂中,在(R)-3-苄基-(R)-6(R)-3-苄基-(R)-6-(4-咪唑基甲基)2,5-哌嗪二酮在(S)-α-氰基-3本发明提供了一种方法,通过该方法,在生产(S)-α-氰基-3-苯氧基苄醇的方法中使用的上述催化剂可以通过简单的操作以纯化状态回收。\在通过上述反应生产出光学活性的(S)-α-氰基-3-苯氧基苄醇之后, a) 通过将反应混合物与矿物酸接触来萃取催化剂(b) 用碱中和萃取物,以及 (c) 然后进行结晶和过滤处理。
Gel-like shaped body for fragrancing textiles during the washing process
申请人:Henkel AG & Co. KGaA
公开号:US11180717B2
公开(公告)日:2021-11-23
The present invention is in the field of washing and cleaning agents and relates to a fragranced shaped body, including a composition obtained by bringing the following components into contact: (a) at least one gelling agent having a molar mass of <2000 g/mol and (b) at least one fragrance. The invention also relates to a washing or cleaning agent, including the fragranced shaped body according to the invention, a method for producing the fragranced shaped body according to the invention and the use of the fragranced shaped body according to the invention for fragrancing surfaces.
Gel-Like Shaped Body For Fragrancing Textiles During The Washing Process
申请人:Henkel AG & Co. KGaA
公开号:US20200115654A1
公开(公告)日:2020-04-16
The present invention is in the field of washing and cleaning agents and relates to a fragranced shaped body, including a composition obtained by bringing the following components into contact: (a) at least one gelling agent having a molar mass of <2000 g/mol and (b) at least one fragrance. The invention also relates to a washing or cleaning agent, including the fragranced shaped body according to the invention, a method for producing the fragranced shaped body according to the invention and the use of the fragranced shaped body according to the invention for fragrancing surfaces.