1575-67-3Relevant articles and documents
Oxovanadium-induced or -catalyzed oxidative allylation of 1,3-dicarbonyl compounds with allylsilanes
Hirao,Sakaguchi,Ishikawa,Ikeda
, p. 2579 - 2585 (1995)
The oxidative mono- or di-allylation reaction of 1,3-dicarbonyl compounds with allylsilanes was selectively achieved by treatment with VO(OEt)Cl2.
Etude de l'allylation, catalysee par le nickel, d'enolates stables, par les ethers et les alcools allyliques
Alvarez, Eleuterio,Cuvigny, Therese,Julia, Marc
, p. 199 - 212 (1988)
The allylation of stable enolates derived from diethyl malonate and ethyl cyanoacetate by a variety of aliphatic or aromatic allylic ethers and by allylic alcohols, under nickel catalysis, was investigated.The influence of ligands, solvents and temperature was studied.
On the mechanism and kinetics of radical reactions of epoxyketones and epoxynitriles induced by titanocene chloride
Fernandez-Mateos,Herrero Teijon,Mateos Buron,Rabanedo Clemente,Rubio Gonzalez
, p. 9973 - 9982 (2007)
(Chemical Equation Presented) The reactions of a series of epoxynitriles and epoxyketones induced by titanocene chloride have been studied. The kinetics of the decyanogenation of β,γ-epoxynitriles with Ti(III) corresponds to a radical reaction (k25 ≈ 106 S-1), as demonstrated by competition experiments with H-transfer from 1,4-cyclohexadiene (1,4-CHD) or PhSH or conjugate addition to acrylonitrile. The 5-exo cyclization onto nitrile induced by Ti(III) is a radical reaction (k25 ≈ 107 S-1) as seen in competition experiments with H-transfer from PhSH or the titanocene-water complex. The iminyl or alkoxyl radicals generated by 5-exo cyclization onto nitriles or ketones only undergo a reduction with Ti(III). This reaction overwhelms any alternative process, such as tandem cyclization onto alkenes or β-scission. Iminyl radicals generated by 4-exo cyclizations onto nitriles undergo reduction with Ti(III) and β-scission reaction in a ratio of 96:4 when the α-substituent is CN. Alkoxyl radicals from 4-exo cyclizations onto ketone carbonyls undergo reduction with Ti(III) and β-scission in a ratio of 60:40 when the α-substituent is COOR. In nearly all the reactions studied, the role of Ti(III) is triple: a radical initiator (homolytic cleavage of oxirane), a Lewis acid (coordination to CN or C=O). and a terminator (reduction of iminyl or alkoxyl radicals).
Preparation method of cyclopentenyl aryl ketoxime compound
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Paragraph 0030, (2020/11/23)
The invention discloses a preparation method of a cyclopentenyl aryl ketoxime compound, and belongs to the technical field of fine chemical engineering. According to the method disclosed by the invention, specific ferric iron is used as a catalyst, a nitr
Kinetic benchmarking reveals the competence of prenyl groups in ring-closing metathesis
Bahou, Karim A.,Braddock, D. Christopher,Meye, Adam G.,Savage, G. Paul
supporting information, p. 5332 - 5335 (2017/11/07)
A series of prenyl-containing malonates are kinetically benchmarked against the standard allyl-containing congeners using a ruthenium benzylidene precatalyst for ringclosing metatheses. The prenyl grouping is found to be a superior acceptor olefin compared to an allyl group in RCM processes with ruthenium alkylidenes derived from terminal alkenes. The prenyl group is also found to be a highly competent acceptor for a ruthenium alkylidene derived from a 1, 1-disubstituted olefin in a RCM process.
Synthesis of gem-dichlorocyclopropylmethylmalonates and decarboxylation
Raskildina, Gulnara Z.,Borisova, Julia G.,Zlotsky, Simon S.
, p. 29 - 33 (2016/07/15)
(Formula presented) By studying the reaction of chloromethyl-gem-dichlorocyclic propanes and diethyl malonate the esters of acids including the cyclopropane fragments have been obtained. Their counter synthesis was carried out by carbonation of corresponding alkenyl malonates. By decarboxylation of substituted malonates the derivatives of cyclic propane carboxylic acids were synthesized. Efficiency of using the obtained products as plant growth regulators was proved.
