Butanediol, also called butylene glycol, may refer to any one of four stable structural isomers:
-
1,2-Butanediol
-
1,3-Butanediol
-
1,4-Butanediol
-
2,3-Butanediol
Geminal diols
There are also two
(gem-diols), which are less stable:
Isobutylene glycol and methylpropanediol
Isobutylene glycol may be considered a kind of butylene glycol, similarly to butane historically including
n-butane and
isobutane (isobutane). The modern name for the closely related type of compounds is methylpropanediol. There are two stable structural isomers:
-
2-methylpropane-1,2-diol
-
2-methylpropane-1,3-diol
and one unstable geminal diol:
-
2-methylpropane-1,1-diol (not a glycol), hydrate of Isobutyraldehyde (isobutyraldehyde)
These three methylpropanediols are structural isomers of butanediols. They are not chiral.
Examples
2-Methylpropane-1,3-diol derivatives:
-
Crisnatol, an experimental medication
-
2-Methyl-2-propyl-1,3-propanediol, medication precursor and active metabolite
See also
-
Diol
-
Hydroxyl-substituted butanes