4-methyl- l,3-dioxolan-2-one

Methyl- 1-cyclopentene 3- Methyl-1-cyclopentene 4- Methyl-1-cyclopentene Methyl cyclopropanecarboxylate 2-Methyldecane 4-Methyldecane Methyl decanoate Methyl dichloroacetate Methyldichlorosilane Methyl 2,2-dimethylpropanoate 2-Methyl-1,3-dioxane 4-Methyl-1,3-dioxane 4-Methyl-l,3-dioxolan-2-one 9.62... 

Iron(II) in sea water forms complexes with 2,4,6-tripyridyl-sym-triazine or 4,7-diphenyl- 1,10-phenanthroline which are readily extracted with propylene carbonate (4-methyl-l,3-dioxolane-2-one). This extractant is colorless, nonhygroscopic, chemically stable, and more dense than water, but slightly soluble therein. Prior to complexa-tion the iron(III) has to be reduced to its divalent state by adding hydroxylammo-nium hydrochloride 67). 

Typical procedure. 4-Methyl-l,3-dioxolan-2-one 958 [676] To a stirred solution of 1,2-propanediol 957 (230 mg, 3.0 mmol) in toluene (8 mL) was added DPC (670 rag, 3.1 mmol). After stirring at 110 °C for 1.5 h, the reaction mixture was allowed to cool to room temperature, diluted with dichloromethane (40 mL), washed with brine (30 mL), dried over anhydrous MgS04, and concentrated to dryness under reduced pressure. The crude product was distilled in vacuo in a kugelrohr apparatus to give 4-methyl-l,3-dioxolan-2-one 958 (254 mg) in 83% yield bp 73-75 °C IR... 

Insertion reactions of carbon dioxide are attracting renewed interest. Reaction of methyloxiran at room, temperature with only 1 atm. of CO2 and MoCls-PPha as catalyst leads to 4-methyl-l,3 dioxolan-2-one. Without the metal catalyst both high temperatures and high carbon dioxide pressures are required to achieve the same reaction. 

Ethylene Tetrafluoroethylene Copolymer (ETFE) Polyvinylidene Fluorides (PVDF) 4-Methyl-l,3-Dioxolan-2-one ... 

The direct fluorination of PC and trans-butylcm carbonate (f-BC) gave four and two mono-fluorinated derivatives, respectively as shown in Scheme 2.4 [5, 26]. 4-Fluoromethyl-l,3-dioxolan-2-one (fluoromethylethylene carbonate, FMEC hereafter renamed as FPC for easy understanding), 4-fluoromethyl-5-methyl-l,3-dioxo-lan-2-one (fluormethylmethylethylene carbonate, FMMEC hereafter renamed as F- -BC for easy understanding) were obtained by fractional distillation of the fluorinated samples. 

Beside carbenes and carbenoids, metal-catalyzed cyclopropanation using other types of intermediate is also feasible. Treatment of 5-methyl-5-phenyl-4-methylene-l,3-dioxolan-2-one with palladium(O) catalyst in the presence of norbomene produced the cyclopropyl ketone in excellent yield (Scheme 8) (60). The active intermediate was proposed to be a Zwitterion... 

Components 1. C4H6O3, (+,-)-Methyl-l,3-dioxolan-2-one [108-32-7] 2. C4H8O2,1,4-Dioxane [123-91-1]... 

Methyl-4- 2-(2-methyl-l,3-dioxolan-2-yl)ethyl -2-cyClopenten-l-one (7) Typical Procedure13 ... 

Additional new systemic fungicides are being introduced for wheat disease control. One material CGA 64250 (Tilt),(l-(2-(2,4-di-chlorophenyl)4-propyl-l,3,-dioxolan-2-yl methyl)-H-l,2,4-triazole), is effective for control of powdery mildew, rust, and Septoria leaf blotch. However at this point in time, it is not certain whether U.S. EPA registration will allow a short enough interval between treatment and harvest for effective disease control by this compound. 

Benzyl-2-methyl-l H-imidazol-4-yl)-5-(2-methyl-[l, 3]dioxolan-2-yl)-pentan-l -one... 

The problem of non-specific decomposition is exemplified by the study of 4-methyl-l, 3-dioxolane [657]. Following El the d2 molecule labelled at the 2 position (the ring C between the O s) gave a metastable peak for loss of D- but not for loss of H In the mass spectrum, however, the peak intensity for H loss was greater than that for D loss, suggesting that there were not just one, but at least two, reaction channels for atomic hydrogen loss. 

O c 0 c c Bis(dioxolane) ethylene carbonate c r-2-/-butyl-5-carboxymethyl-l,3-dioxolan-4-one 2-methyl-l,3-dioxolan-2-ylium perchlorate 5-bromo-4-formyl-l,3-benzodioxoleav... 

Related Reagents. (2S,4S)-3-Benzoyl-2-r-butyl-4-methyl-l,3-oxazolidin-5-one t-Butyl 2-t-Butyl-3-methyl-4-oxo-l-imi-dazolidinecarboxylate (/ )-2-t-Butyl-6-methyl-4//-l,3-dioxin-4-one (/ ,/ )-2-t-Buty 1-5-methyl-l,3-dioxolan-4-one Diethyl Acetamidomalonate A/-(Diphenylmethylene)aminoacetonitrile Ethyl A/-(Diphenylmethylene)glycinate Ethyl Isocyanoacetate Methyl A/-Benzylidenealaninate (/ )-Methyl 2-t-Butyl-3(2iiO-oxazolecarboxylate. 

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