Benzylidene compounds

Benzylidene compounds are alkene derivatives of benzene.

They are primarily divided into two groups:

Benzylidene is also used to describe a type of protecting group in synthetic organic chemistry of the form PhCH(R)₂ For example, 4,6-O-benzylidene-glucopyranose is a glucose molecule whose 4- and 6-OH groups are protected by being bound to a benzylic carbon, forming a benzyl acetal.