Ethyl -4-phenyl-2-butenoate

Ethyl 3-Phenyl-2-butenoate. This ester leads only to one aldehyde and to the corresponding saturated ester ... 

The reactions catalyzed by rhodium are quite different from those with cobalt. For example, the results with methyl 3,3-dimethacrylate indicate a destabilizing effect of the ester group, leading mainly to hydrogenolysis since isomerization occurs less readily with rhodium than with cobalt. Moreover, the nature and the position of the substituents seem to have little influence on the alkvlrhodiumcarbonyl stability. This attenuates the effect of the ester group, as shown by the results with methyl tiglate, methyl cinnamate, and ethyl 3-phenyl-2-butenoate. 

Butenoate Ethyl 3-Phenyl-4.4.4-trilluoro- E10b2. 544/547 (Educt)... 

In contrast to literature data (1886LAI 12CB1557), base-catalyzed cy-clizalion of 3-ethyl-2-thioureidobutenoate has been shown not to produce thiouracil 58, but to produce 2-amino-4-methyl-6-oxo-6//-l,3-thiazine 59 (Scheme 36) (80CCC732). Ethyl 2-isothiocyanato-3-phenyl-2-butenoate... 

C13H12 1-allytnaphthalene 2489-86-3 539.15 47.658 1.2 25873 C13H13N02 ethyl 2-cyano-3-phenyl-2-butenoate 18300-89-5 538.15 47.561 2... 

The intermolecular Michael addition of ethyl 2-cyano-3-phenyl-2-butenoate and ethyl cinnamate in benzene containing sodium hydride and a little dry ethanol followed by aromatisation of the intermediate by refluxing for 1 hour gave after acidification ethyl 3-cyano-4,6-diphenyl-2-hydroxybenzoate in 52% yield (ref.40). 

PALLADIUM-CATALYZED COUPLING OF ACID CHLORIDES WITH ORGANOTIN REAGENTS ETHYL (E)-4-(4-NITR0-PHENYL)-4-0X0-2-BUTENOATE... 

Unsaturated esters are prepared by the carbonylation of allylic compounds under various conditions depending on the leaving groups. Carbonylation of allylic chlorides proceeds under two-phase (liquid-solid) and mild conditions (room temperature, 1 atm of CO in the presence of K2CO3 in EtOH) using ligandless Pd catalyst. Ethyl 4-phenyl-3-butenoate was obtained from cinnamyl chloride in 94% yield [143]. Allylic carbonates are reactive and their carbonylation proceeds under mild neutral conditions [144]. 

Synonyms Ciodrin Ciovap Cyodrin Cypona E.C. 3-((Dimethoxyphosphinyl)oxy)-2-butenoic acid 1-phenylethyl ester (9,(9-Dimethyl (9-(l-methyl-2-carboxy-a-phenyl-ethyl)vinyl phosphate Decrotox Dimethyl-c/.s-l-methyl-2-(l-phenylethoxycarbo-nyl)vinyl phosphate Dimethyl phosphate of a-methylbenzyl 3-hydroxy-c/.s-crotonate Duo-kill Duravos ENT 24717 l-Methylbenzyl-3-(dimethoxyphosphinyloxo)isocroto-nate a-Methylbenzyl-3-(dimethoxyphosphinyloxy)-c/ -crotonate a-Methylbenzyl 3-hydroxycrotonate dimethyl phosphate Pantozol 1 c/.s-2-(l-Phenylethoxy)carbonyl-l-methylvinyl dimethyl phosphate SD 4294 Shell SD 4294 Volfazol. 

If the photo reaction exposure is continued, the cis isomer, which is formed quickly, slowly undergoes conversion to a more stable, new product, ethyl 4-phenyl-4-phenoxy-3-butenoate.This conversion of the intermediate ds isomer may be followed conveniently by thin-layer chromatography. Maximum yields are obtained over approximately 24 h under the above reaction conditions. The product has Rf = 0.8 in 1 1 hexane/methylene chloride. Evaporation of the solvent yields a yellow oil. 

Figure 6.15 IR spectrum ethyl 4-phenyl-4-phenoxy-3-butenoate.

A large-scale cyclization reaction of carbamates with functionalized butenoates, starting from carbamates prepared without phosgene, for the efEdent preparation of 3-(substituted phenyl)-5-isopropylidene-l,3-oxazolidine-2,4-dione derivatives (azaladones) having potent herbicidal adivity, has been described in a patent application [240]. By reacting an N-(substituted phenyl)carbamate 312 with a 2-hydroxy-3-alkenoic acid ester (for example, ethyl 2-hydroxy-3-methyl-3-butenoate) or a 3-alkoxy-2-hydroxyalkanoic add ester, at 210 °C for 15 h, azaladone 313 was formed in 71.5% yield. 

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