METHYLIDENE MALONATE PROCESS

摘要

An improved process for the production of methylidene malonates is attained by use of select iminium salt reactants.

主权项

1. A method of producing methylidene malonates said method comprising reacting a malonic acid ester with an iminium salt of the formula wherein R4 and R5 are each independently H or a hydrocarbon and R6 and R7 are each a hydrocarbon or substituted hydrocarbon or together form a bridge whereby the nitrogen atom, R6 and R7 together form a ring structure; provided that neither of R6 and R7 is a hydrocarbon moiety comprising a tertiary carbon attached to the N atom and X is an anion.