119555-96-3Relevant academic research and scientific papers
Titanium mediated olefination of aldehydes with α-haloacetates: An exceptionally stereoselective and general approach to (Z)-α-haloacrylates
Augustine, John Kallikat,Bombrun, Agnes,Venkatachaliah, Srinivasa,Jothi, Anandh
, p. 8065 - 8072 (2013/12/04)
An exceptionally stereoselective and general synthesis of (Z)-α-haloacrylates, ready to undergo various synthetic transformations, has been demonstrated from α-haloacetates and aldehydes in a one-pot manner via the titanium-enolate based asymmetric aldol
Ru-catalyzed highly chemo- and enantioselective hydrogenation of γ-halo-γ,δ-unsaturated-β-keto esters under neutral conditions
Ma, Xin,Li, Wanfang,Li, Xiaoming,Tao, Xiaoming,Fan, Weizheng,Xie, Xiaomin,Ayad, Tahar,Ratovelomanana-Vidal, Virginie,Zhang, Zhaoguo
supporting information; experimental part, p. 5352 - 5354 (2012/06/30)
Finely-tuned ruthenium-catalyzed highly chemoselective and enantioselective hydrogenation of γ-halo-γ,δ-unsaturated-β-keto esters at the carbonyl group was achieved under neutral reaction conditions (ee up to 97%). Both olefin and alkenyl halogen moieties, which are labile under hydrogenation conditions, remained untouched during the reaction.
Biocatalyzed enantioselective reduction of activated C=C bonds: Synthesis of enantiomerically enriched α-halo-β-arylpropionic acids
Brenna, Elisabetta,Gatti, Francesco G.,Manfredi, Alessia,Monti, Daniela,Parmeggiani, Fabio
experimental part, p. 4015 - 4022 (2011/09/15)
The enantioselective biocatalyzed reduction of the C=C bond of some (Z)-methyl α-halo-β-arylacrylates was investigated. The reaction was performed by baker's yeast fermentation and Old Yellow Enzymes 1-3 mediated biotransformations. The final products wer
Synthesis of dihalohydrins and tri- and tetra-substituted olefins
-
Page 7, (2008/06/13)
A novel synthesis reaction for highly stereospecific tri- and tetra-substituted olefins is described. A single stereoisomer of stable α-halo-α,β-ester is produced in high yield by the reaction of aldehyde or ketone with a trihalogenated compound such as t
(Z)-α-haloacrylates: An exceptionally stereoselective preparation via Cr(II)-mediated olefination of aldehydes with trihaloacetates
Barma,Kundu, Abhijit,Zhang, Hongming,Mioskowski, Charles,Falck
, p. 3218 - 3219 (2007/10/03)
(Z)-α-Fluoro-, (Z)-α-chloro-, and (Z)-α-bromoacrylates were obtained with unprecedented yield and stereocontrol (>99%) via addition of the corresponding commercial trihaloacetates to aldehydes at room temperature using stoichiometric Cr(II) salts or catal
Addition of α-halocarboxylic acid esters to para-substituted benzaldehydes in the presence of pentacarbonyliron
Terent'ev,Vasil'eva,Kuz'mina,Mysova,Chakhovskaya
, p. 1273 - 1275 (2007/10/03)
Pentacarbonyliron promotes addition of α-halocarboxylic acid esters at the carbonyl group of benzaldehyde and its para-substituted analogs. The substituent in the benzene ring strongly affects the process.
Synthesis of α-Halocinnamate Esters via Solvolytic Rearrangement of Trichloroallyl Alcohols
Kruper, William J.,Emmons, Albert H.
, p. 3323 - 3329 (2007/10/02)
Aryl trichlorovinyl ketones undergo regioselective reduction to the corresponding carbinols with sodium borohydride in alcoholic solvents and are transformed to the (Z)-α-chlorocinnamate ester derivatives via an acid-catalyzed allylic rearrangement.Micharl addition of ammonia to these ester derivatives affords cis- and/or trans-aziridine amides.The facile rearrangement allows the synthesis of d,l-phenylalanine derived from perchloroethylene and toluene.
Reactions of α,β-Unsaturated Carboxylates, Malonates and Phenylacetates with Manganese(III) Acetate in the Presence of Chloride Ions
Yonemura, Hiroshi,Nishino, Hiroshi,Kurosawa, Kazu
, p. 809 - 811 (2007/10/02)
The reaction of alkyl (E)-3-phenylpropenoates with manganese(III) acetate of Cl- ions gave alkyl (Z)-2-chloro-3-phenylpropenoates and alkyl 2,3-dichloro-3-phenylpropenoates.Ethyl (E)-2,3-diphenylpropenoate yielded ethyl 2,3-dichloro-2,3-diphenylpropanoate.Alkyl 3,3-diphenylpropenoates gave mainly alkyl 2-chloro-3,3-diphenylpropenoates.Ethyl 1-cyclohexenecarboxylate gave ethyl 1,2-dichlorocyclohexanecarboxylate.Dimethyl malonate yielded dimethyl dichloromalonate and tetramethyl 1,2-dichloro-1,1,2,2-ethanetetracarboxylate.Substituted malonates resulted in α-chloro derivatives.Methyl phenylacetates gave α-acetoxy derivatives.
Mechanism of Dehydroacetoxylation of Methyl 3-Acetoxy-3-aryl-2-halogenopropanoates
Cabaleiro, Mercedes C.,Garay, Raul O.
, p. 1091 - 1096 (2007/10/02)
The rate of sodium methoxide-induced dehydroacetoxylation of the diesters p-RC6H4CH(OAc)CXHCO2Me (X= Br or Cl) has been studied as a function of the para-substituent.The results correspond to the para-substituent effects expected for proton abstraction from C-2, as estimated from the diastereoisomerisation of model compounds under similar conditions.This suggests that the elimination occurs via a carbanion mechanism, with C(2)-H bond-breaking rate-determining.The apparent insensitivity of the kinetic behaviour to configuration differences, together with the response of the reactions to the effect of the 3-substituent, is interpreted in terms of inductive stabilisation by the 2-halogen atom, which tends to localise the incipient negative charge at C-2, inhibiting distortion of its tetrahedral geometry.
