Ethyl 7>-tolyl ketone

Enantioselective Darzens Reaction. An enantioselective Darzens reaction between ethyl methyl ketone and chloromethyl p-tolyl sulfone in the presence of a chiral ammonium salt derived from (1) and chloromethylpolystyrene affords an optically active a,p-epoxy sulfone in 23% ee. ... 

Optically active a, -epoxy stdfones. - The Darzens reaction of ethyl methyl ketone with chloromethyl / -tolyl sulfone in a two-phase system in the presence of chiral ammonium salts such as N-ethylephedrinium bromide results in a,/3-epoxy sulfones with 0-2.57o optical yields. However, if the supported catalyst (1) is used, optical yields of up to 23% can be obtained as in the example formulated in equation (I). On the other hand, the reaction is slower when the catalyst is supported. The presence of a hydroxy group jS to the nitrogen atom of the catalyst is essential for asymmetric induction. 

Phenyl tolyl ketone. See 2-M ethyl benzophenone Phenyl p-tolyl ketone. See 4-Methylbenzophenone Phenyl-o-tolyl-methanone. See 2-Methylbenzophenone 6-Phenyl-1,3,5-triazine-2,4-diamine. See Benzoguanamine... 

Chloronaphthalene Hydrogen sulfide Tri-m-cresyl phosphate Tri-p-tolyl phosphate EPDM peroxide-cured modifier 1,2-Polybutadiene Vinyl butadiene ephedrine synthesis Ethyl phenyl ketone epilepsy management Boron... 

Methoxy-4-methylphenol 202-255-5 2-Phenylpropanal 202-256-0 1-Phenyl-1-propanol 202-257-6 Ethyl phenyl ketone 202-259-7 Methyl benzoate 202-261-8 Methyl nicotinate 202-268-6 Aradur 2844 Casamine 0TB o-Tolyl biguanide 202-280-1 Ablumide SDE Alkamide DS-280 Alkamide DS-280/S Amidex SE Aromide HL-21 Colamid 280 Hetamide DS Jeemide N-1918 Karamide ST-DEA Lipamide S Loramide SD Marvansoft RE-1256 Monamid 718 Nopcogen 14-S Olamida ED Onyxol 42 Protamide SA Stearamide DEA Unamide S Unamide W Upamide SD 202-281-7 Active 18... 

Ethyl m-tolyl Ketone 3-MethiApropio-. phenone, 3-propionyttoiuene). 

Propionyl O Cresol, ethyl o-hydroxy-va-tolyl ketone). 

The relative rates for various organolithium compounds are para-tolyl > phenyl > ethyl > isopropyl. As for the ketone, the rate is enhanced by electron-withdrawing substituents which increase the coordinating power of the carbonyl carbon. It therefore appears that the crucial step is the electrophilic attack by the carbonyl on the group R of the organolithium compound. 

Formaldehyde dimethyl dithioacetal 5-oxide (FAMSO 113) and its ethyl analog are widely used as synthetic carbonyl equivalents. - Addition of the lithio derivative of (113) to aldehydes and ketones followed by acidic hydrolysis is a preparative method for a-hydroxy aldehyde derivatives (equation 27). A chiral analog of (113), (5)-formaldehyde di-p-tolyl dithioacetal 5-oxide (114), can be synthesized from (-)-mentyl (/ )-p-toluenesulfinate. °° The reaction of the lithio derivative of (5)-(114)... 

Ethyl 5-amino-4-oxo-3-p-tolyl-3,4-dihydrothieno [3,4-d] pyridazin-l-carboxylate (295) and p-dimethylaminopropiophenone (presumably converted by loss of dimethylamine into phenyl vinyl ketone under the reaction conditions) probably gave the intermediate adduct (296) that lost H2S to afford ethyl 5-amino-7-benzoyl-4-oxo-3-p-tolyl-3,4-dihydro-1 -phthalazinecarboxylate (298) (Mc2NCHO, trace AcOH, reflux, 2h 61%) the same substrate (295) with p-methoxy-p-nitrostyrene likewise gave ethyl 5-amino-7-p-methoxyphenyl-6-nitro-4-oxo-3-p-tolyl-3,4-dihydro-l-phthalazinecarboxylate (297) (80%) and many analogs were made similarly. ... 

Full details of the total synthesis of ( )-pyrenophorin (107) have been published. The final cyclization was affected using di-imidazoyl-l-yl ketone as lactonizing reagent. The synthesis also features the use of the 2-(tolyl-/7-sulphonyl) ethyl protecting group for carboxylic acids selective removal of this group in the presence of other esters is easily achieved (DBN 25 °C). 

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