SYNTHESIS OF PHOSPHITYLATED COMPOUNDS USING A QUATERNARY HETEROCYCLIC ACTIVATOR

摘要

A method for preparing a phosphitylated compound comprising the step of:—reacting a hydroxyl containing compound with a phosphitylating agent in the presence of an activator having the formula (I) wherein R=alkyl, cycloalkyl, aryl, aralkyl, heteroalkyl, heteroaryl R₁, R₂=either H or form a 5 to 6-membered ring together. X₁, X₂=independently either N or CH Y=H or Si(R₄)₃, with R₄=alkyl, cycloalkyl, aryl, aralkyl, heteroalkyl, heteroaryl B=deprotonated acid. The hydroxyl containing compound is preferably a sugar moiety or a nucleoside or an oligomer derived therefrom.;