Production of cyanate compound

TLDR: In this article, a cyanate compound is obtained by adding a t-amine such as triethylamine and a cyanogen halide such as cyanogen chloride at the same time to a bisphenol compound of formula I (A is H or a 1-6C alkyl; X is single bond, a 1 -20C organic group, carbonyl, sulfone, S or O).

Abstract: PURPOSE: To easily obtain a cyanate compound in high safety, purity and yield by simultaneously adding a t-amine and a cyanogen halide to a specific bisphenol compound, reacting the compounds with each other, washing the product and separating the liquid phases. CONSTITUTION: The objective cyanate compound is produced by adding (A) a t-amine such as triethylamine and (B) a cyanogen halide such as cyanogen chloride at the same time to (C) a bisphenol compound of formula I (A is H or a 1-6C alkyl; X is single bond, a 1-20C organic group, carbonyl, sulfone, S or O; (i) is 0-4) in the presence of a solvent forming separable phases with water such as methyl isobutyl ketone, subjecting the reaction product to the washing with water and the separation into liquid phases to remove the t-amine hydrohalogenic acid salt, contacting the obtained solution (concentrate) with a poor solvent selected from sec-alcohols, t-alcohols and hydrocarbons to cause the crystallization or precipitation and obtain purified product. The compound is useful as a sealing resin for electronic parts or a resin for laminated board, composite material, molded article or adhesive.