Reactions of ethyl triphenylphosphoranylideneacetate with fluorinated β-ketoaldehyde derivatives
摘要:
The reactions of fluorinated beta-ketoaldehyde derivatives: beta-alkoxyvinyl polyfluoroalkyl ketones 1 and fluorinated beta-ketoacetals 2 with ethyl triphenylphosphoranylideneacetate 3 are described. In the case of ketones 1 the result of the reaction is a mixture of products: fluorinated alkoxydienes 5 (Wittig reaction product) and polyfluoroacyl vinyl ylides 7 (Michael addition product). The reaction with fluorinated beta-ketoacetals 2 leads to a mixture of E- and Z-isomers of polyfluoroalkyl acrylates 8 and 9, respectively. The influence of the nature of fluorinated substituent and solvent or other factors on the outcome of the reactions are discussed. (C) 2007 Elsevier Ltd. All rights reserved.
Method for the Production of N-Substituted (3-Dihalomethyl-1-Methyl-Pyrazole-4-yl) Carboxamides
申请人:Zierke Thomas
公开号:US20100174094A1
公开(公告)日:2010-07-08
The present invention relates to a process for preparing N-substituted (3-dihalomethylpyrazol-4-yl)carboxamides of the formula (I)
in which R
1
is optionally substituted phenyl or C
3
-C
7
-cycloalkyl, R
1a
is hydrogen or fluorine, or R
1a
together with R
1
is optionally substituted C
3
-C
5
-alkanediyl or C
5
-C
7
-cycloalkanediyl, R
2
is C
1
-C
6
-alkyl, C
2
-C
6
-alkenyl, C
2
-C
6
-alkynyl or C
1
-C
4
-alkoxy-C
1
-C
2
-alkyl, X is F or Cl and n is 0, 1, 2 or 3; which comprises
A) providing a compound of the formula (II)
in which X is F or Cl, Y is Cl or Br and R
2
has one of the meanings given above and
B) reacting a compound of the formula (II) with carbon monoxide and a compound of the formula (III)
in which R
1
, R
1a
and n have one of the meanings given above; in the presence of a palladium catalyst;
to intermediates used for the preparation according to the process according to the invention, and also to processes for their preparation.
[EN] PROCESS FOR THE MANUFACTURE OF ALKENONES<br/>[FR] PROCÉDÉ DE FABRICATION D'ALCÉNONES
申请人:SOLVAY
公开号:WO2011003860A1
公开(公告)日:2011-01-13
Process for preparing an alkenone, which comprises the following steps: (a) providing a halogenated precursor of the alkenone (b) eliminating the hydrogen halide from said precursor to form the alkenone by a thermolysis treatment selected from flash thermolysis, vacuum thermolysis and thermolysis under stripping with inert gas.
[EN] GCN2 INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE GCN2 ET LEURS UTILISATIONS
申请人:MERCK PATENT GMBH
公开号:WO2019148132A1
公开(公告)日:2019-08-01
The present invention provides compounds, compositions thereof, and methods of using the same.
本发明提供了化合物、其组合物以及使用它们的方法。
A Scalable and Regioselective Synthesis of 2-Difluoromethyl Pyridines from Commodity Chemicals
作者:Jean-Nicolas Desrosiers、Christopher B. Kelly、Daniel R. Fandrick、Larry Nummy、Scot J. Campbell、Xudong Wei、Max Sarvestani、Heewon Lee、Alexander Sienkiewicz、Sanjit Sanyal、Xingzhong Zeng、Nelu Grinberg、Shengli Ma、Jinhua J. Song、Chris H. Senanayake
DOI:10.1021/ol500402e
日期:2014.3.21
novo synthesis of difluoromethyl pyridines from inexpensive materials is reported. The pyridyl subunit is built around the difluoromethyl group rather than a late stage introduction of this moiety. This user-friendly approach allows access to a diverse range of substitution patterns on all positions on the ringsystem and on the difluoromethyl group.
Synthesis and Properties of β-Ethoxyvinyl Polyfluoroalkyl Ketones
作者:Marine G. Gorbunova、Igor I. Gerus、Valery P. Kukhar
DOI:10.1055/s-2000-6386
日期:——
A number of β-ethoxyvinyl polyfluoroalkyl ketones were synthesized by acylation of ethyl vinyl ether with acid chlorides containing polyfluoroalkyl groups of different composition and structure. Some typical nucleophilic reactions of the title compounds with amines were carried out. Two new fluoro-containing pyrimidinoles were synthesized by the reaction of β-ethoxyvinyl polyfluoroalkyl ketones with urea.