Pyridine-borane complex was synthesized by reaction of pyridine with borane-dimethyl sulfide complex. The pyridine-borane complex was used as a precursor for BCN alloy. The BCN alloy was fabricated by passing through a cross-linked pyridine-borane derivative obtained From the pyridine-borane complex by heating at 1273 K for 2 h in Ar. Turbostratic layered BCN alloy was prepared by the pyrolysis of the pyridine-borane derivative. Four coordination number of boron which was remained in both the complex and the derivative changed to three coordination number in the BCN ceramic alloy with a composition of B2NC4 obtained. Lithium insertion into this B2NC4 alloy has been attempted.