A SYNTHESIS OF α-ETHOXYMETHYLENE AND α-CHLOROMETHYLENE CARBOXYLIC ESTERS^{1, 2}

Abstract

It has been found that substituted diohloromethyl malonic esters react rapidly above 65°in inert solvents with one equivalent of ethoxide ion to give a-chloromethylene carboxylic esters in yields generally over 90%. The other products are diethyl carbonate and chloride ion, If two equivalents of ethoxide ion are SUMMARY It is shown that substituted dichloromethyl malonic esters react in inert solvent with one equivalent of ethoxide ion to yield -chloromethylene esters and diethyl carbonate: with two equivalents of ethoxide ion to yield diethyl carbonate and the corresponding -ethoxymethylene ester.The reactions of substituted dichloromethyl malonic esters with two equivalents of ethoxide ion in ethanol produce diethyl carbonate, a-ethoxymethylene esters, ethyl orthoformate, and traces of the ester corresponding to the hydrolysis and decarboxylation of the original substituted malonic ester.

Densities, Viscosities, Refractive Indices, and Heat Capacities of Poly(ethylene glycol-ran-propylene glycol) + Esters of Carbonic Acid at (293.15 and 313.15) K and at Atmospheric Pressure

“…Experimental values of densities, ρ, dynamic viscosities, η, refractive indices, n D , and heat capacities, C p , of the pure liquids were reported in Table and compared with available literature data, − where possible.…”

“…The purity of liquids was confirmed by GLC analysis. 1 Experimental values of densities, F, dynamic viscosities, η, refractive indices, n D , and heat capacities, C p , of the pure liquids were reported in Table 1 and compared with available literature data, [11][12][13][14][15][16][17][18][19][20][21][22] where possible.1 H NMR Analysis. 1 H NMR spectra were obtained on an AC 200 F Bruker spectrometer interfaced with an Aspect 3000 computer, using the Bruker DISR 90 acquisition software.…”