NOVELTY - An oxirane compound (I), is new.    USE - New oxirane compound is used in manufacture of nitrogen-containing heterocyclic-type compound e.g. 1,3-bis(3-phenyl-5-pyrazolyl)benzene, 1,3-bis(5-phenyl-3-pyrazolyl)benzene, 1,3-bis(1-methyl-3-phenyl-5-pyrazolyl)benzene, 1,3-bis(1-ethyl-3-phenyl-5-pyrazolyl)benzene, 1,3-bis(1-propyl-3-phenyl-5-pyrazolyl)benzene, 1,3-bis(1-isopropyl-3-phenyl-5-pyrazolyl)benzene, 1,3-bis(1-methyl-5-phenyl-3-pyrazolyl)benzene, 1,3-bis(1-ethyl-5-phenyl-3-pyrazolyl)benzene, 1,3-bis(1-propyl-5-phenyl-3-pyrazolyl)benzene, 1,3-bis(1-isopropyl-5-phenyl-3-pyrazolyl)benzene, 1,3-bis(3-phenyl-5-isoxazolyl)benzene, 1,3-bis(5-phenyl-3-isoxazolyl)benzene, 1,3-bis(2-methoxy-4-phenyl-6-pyrimidyl)benzene, 1,3-bis(2-ethoxy-4-phenyl-6-pyrimidyl)benzene, 1,3-bis(2-propoxy-4-phenyl-6-pyrimidyl)benzene, 1,3-bis(2-isopropoxy-4-phenyl-6-pyrimidyl)benzene, and 1,3-bis(2-hydroxy-4-phenyl-6-pyrimidyl)benzene (all claimed). Uses include but are not limited to intermediates of pharmaceuticals and agrochemicals, analytical reagent, dye, pigments, optical materials, and electronic materials.    ADVANTAGE - The oxirane compound enables efficient manufacture of nitrogen-containing heterocyclic-type compound with spontaneous ignition property and suppressed generation of hydrogen bromide, without using sodium amide, by environmentally-friendly process.    DETAILED DESCRIPTION - An oxirane compound of formula (I), is new.    R1,R2=optionally substituted aryl;and    R3-R7=H, halo, 1-3C alkyl, 1-3C alkoxy, hydroxy, amino, aryl, ester, or amido, at least one of R3-R6 being substituent of formula (ii).    An INDEPENDENT CLAIM is included for manufacture of nitrogen-containing heterocyclic-type compound of formulae (III)-(V), which involves using the oxirane compound.    R'3-R'7=H, halo, 1-3C alkyl, 1-3C alkoxy, hydroxy, amino, aryl, ester, or amido, at least one of R'3-R'6 being substituent of formula (vi)-(viii);    Z1=oxygen or NR10;    R10,R11=H, 1-3C alkyl, aryl, or acyl;    Z2=oxygen or NR11;    R8,R9=H or 1-3C alkyl.