| 摘要 |
<p>Process for the preparation of alkylencarbonates of the formula: wherein R1 and R2 each represent a hydrogen atom,and R represents a lower alkyl radical consisting of reacting compounds of the type wherein R1 and R2 have the aforesaid meanings and Y represents a halogen atom, with an alkaline or alkaline earth metal salt of a carboxylic acid RCOOH wherein R has the aforesaid meainings, in presence of that acid itself and the products obtained thereof. These products are useful as intermediates for numerous organic synthesis, such as for the preparation of .beta.-hydroxy-aminoacids or .alpha., .alpha., .beta.-tri-acyl (aroyl) oxy-derivatives.</p> |
