In organoboron chemistry, the Brellochs reaction provides a way to generate the monocarboranes. The Brellochs method uses formaldehyde to insert single carbon atoms into boron hydrides. [1]
Illustrative is the synthesis of CB9H14− from commercially available decaborane. [2]
Oxidation of the arachno anion gives nido-6-CB9H12−. Base degradation of the latter gives arachno-4-CB8H14.