Patent ID: 9196844
Filing Date: 2015-11-24
Classification: C07D,H01L

Abstract:
1. A method comprising the step of cyclizing an α-diketone and a 1-(haloaryl)ethane-1,2-diamine derivative to form a 2-(haloaryl)pyrazine derivative, wherein the α-diketone is any one of glyoxal, 1-phenyl glyoxal, benzil, and 9,10-phenanthrenequinone in which phenyl groups of benzil are bonded to each other at the ortho position, wherein the 1-(haloaryl)ethane-1,2-diamine derivative is represented by a formula (A1), wherein α represents an aryl group, wherein X represents halogen, and wherein n is any of 1 to 3.