Synthesis of Spirocyclic Butenolides by Ring Closing Metathesis
作者:Peter Langer、Uwe Albrecht
DOI:10.1055/s-2002-34906
日期:——
Spirocyclic butenolides were efficiently prepared by a ring closing metathesis strategy.
通过环闭合复分解策略,成功高效地合成了螺环丁烯内酯。
Method for producting macrocyclic ketones
申请人:——
公开号:US20040082816A1
公开(公告)日:2004-04-29
The present invention relates to a novel thermo-isomerization method for rapidly and simply producing macrocyclic ketones of the formula Ia or Ib.
1
The macrocyclic ketones are prepared in the gas phase at temperatures above 500° C. rapidly and in a simple manner from alcohols of the formula IIa and IIb directly with a high yield.
2
In the formulae Ia, Ib, IIa and IIb, R
1
-R
5,
and n have the meanings given in the description.
The present invention relates to a novel thermo-isomerization method for rapidly and simply producing macrocyclic ketones of the formula Ia or Ib.
The macrocyclic ketones are prepared in the gas phase at temperatures above 500° C. rapidly and in a simple manner from alcohols of the formula IIa and IIb directly with a high yield.
In the formulae Ia, Ib, IIa and IIb, R1-R5, and n have the meanings given in the description.
Die vorliegende Erfindung betrifft ein neues Thermo-Isomerisierungsverfahren zur schnellen und einfachen Herstellung von makrocyclischen Ketone der Formel (Ia) oder (Ib).
Die makrocyclischen Ketone werden in der Gasphase bei Temperaturen von 500° bis 700°C schnell und in einfacher Weise ausgehend von Verbindungen (IIa) oder IIb) direkt mit einer hohen Ausbeute hergestellt.
In den Formeln (Ia), (Ib), (IIa) und (IIb) haben R1-R4, m und n die in der Beschreibung angegebenen Bedeutungen.