Potassium carbonate as a base for generation of carbanions from CH-acids in organic synthesis

A reaction of CH-acids with electrophilic agent (Michael acceptors, alkyl and allyl halides, dihaloalkanes and -alkenes, etc.) in the presence of potassium carbonate constitutes a convenient method for the elongation of the carbon chain and provides a possibility to develop preparative methods for the preparation of both the linear and the cyclic structures.