Ortho-ester
In Organic chemistry, a orthoester is a functional Groupe which contien three alkoxy groups fixed on the same carbon atom. The ethyl orthoacétate is an example of orthoester in which three éthoxy groups decorate a CH3C fragment.
The orthoesters are mainly used in organic chemistry as protective groups of esters.
One can obtain them by reaction of nitriles with corresponding alcohols under acid catalysis.
- RCN + 3 R' OH → RC (GOLD') 3 + NH3
The orthoesters are easily hydrolized out of esters in the presence of acidulous water.
- RC (GOLD') 3 + H2O → RCO2R' + 2 R' OH
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