Short and Versatile Two-Carbon Ring Expansion Reactions by Thermo-Isomerization: Novel Straightforward Synthesis of (±)-Muscone, Nor- and Homomuscones, and Further Macrocyclic Ketones
作者:Matthias Nagel、Hans-Jürgen Hansen、Georg Fráter
DOI:10.1055/s-2002-19759
日期:——
the ring-expanded ketone as corresponding α-, and β-substituents, respectively. This novel thermal 1,3-C shift reaction therefore provides a new access to short syntheses of many alkyl-substituted macrocyclic ketone derivatives [e.g. (′)-muscone and analogues] in a systematic manner.
在 600 °C 至约 650 °C 的温度下,1-乙烯基取代的中环和大环环烷醇衍生物在流动反应器系统中的热异构化直接导致扩环大环酮。乙烯基部分的烷基取代基分别作为相应的α-和β-取代基局部特异性地转移到扩环的酮上。因此,这种新颖的热 1,3-C 变换反应为许多烷基取代的大环酮衍生物 [例如 (')-麝香酮和类似物] 以系统方式进行短程合成提供了新途径。
5-NORBORNENE-2-SPIRO-a-CYCLOALKANONE-a'-SPIRO-2''-5''-NORBORNENE AND METHOD FOR PRODUCING THE SAME
申请人:Komatsu Shinichi
公开号:US20120310013A1
公开(公告)日:2012-12-06
A 5-norbornene-2-spiro-α-cycloalkanone-α′-spiro-2″-5″-norbornene represented by the following general formula (1):
[in the formula (1), R
1
s, R
2
, and R
3
each independently represent a hydrogen atom or the like, and n represents an integer of 0 to 12].
Synthese makrocyclischer Ketone durch Ringerweiterung; ein neuer Weg zu(±)-Muscon
作者:Stefan Bienz、Manfred Hesse
DOI:10.1002/hlca.19870700820
日期:1987.12.16
Synthesis of Macrocyclic Ketones by Ring-Enlargement Reactions; a New Path to (±)-Muscone
扩环反应合成大环酮 (±)-Muscone的新途径
Anwendung von Ringerweiterungen zur Herstellung von<i>rac</i>-Muscon und Exalton<sup>®</sup>
作者:Martin Karpf、André S. Dreiding
DOI:10.1002/hlca.19750580821
日期:1975.11.5
Application of RingExpansions for the Preparation of rac-Muscone and Exaltone®
环展开对制备中的应用RAC麝香酮和Exaltone ®
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.