An active methyne compound is a compound that has the following general structural formula.
E1, E2 = a functional group that withdraws electrons by resonance
R= alkyl, aryl
The conjugate base of an active methyne compound is highly resonance stabilized.
Consequently, active methyne compounds, like active methylene compounds, are highly acidic and can be deprotonated, for all practical purposes, irreversibly, using common strong bases, such as the hydroxide ion or alkoxide ions.
See also acetoacetic ester synthesis and malonic ester synthesis.
OCHEMPAL IS NOW IN THE FORM OF A BOOK
Title: The Elements of Organic Chemistry; Subtitle: A Compendium of Terminology, Definitions, and Concepts for the Beginner.
Available at Amazon or the publisher’s website: http://linusbooks.com/?wpsc-product=the-elements-of-organic-chemistry
The book contains everything on OChemPal except some recent additions, a few biochemical terms, and the Mastery Check feature. So, if you prefer reading a book to reading a screen, the book is for you.