Wittig methylenation
= Wittig methylenation
{c}
A <Wittig reaction> with $\mathrm{Ph_3P{=}CH_2}$ that replaces a <carbonyl> <oxygen> by $\mathrm{{=}CH_2}$. On a cyclic <ketone> it installs an exocyclic methylene without inserting a new ring atom.
= Wittig methylenation
{c}
A <Wittig reaction> with $\mathrm{Ph_3P{=}CH_2}$ that replaces a <carbonyl> <oxygen> by $\mathrm{{=}CH_2}$. On a cyclic <ketone> it installs an exocyclic methylene without inserting a new ring atom.