| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject compound consisting of a specific cyclic aryl thiocarbonate, having high refractive index, and therefore useful as a material for optical members. SOLUTION: This compound is a cyclic aryl thiocarbonate of the formula [X1 and X2 are each a group of the formula: CH2-O-R (R is a 1-6C alkyl or the like), Y1 and Y2 are each H; (a) and (b) are each 0 or >=1; Ar1 and Ar2 are each phenylene or a bivalent organic group; n is >=2]. The compound of the formula where (a) and (b) are each 0 is obtained, preferably, by reaction between an aromatic dithiol compound and an aromatic compound having a bifunctional haloformyloxy group in a solvent in the presence of a quaternary onium salt as a phase-transfer catalyst pref. at 0-120 deg.C for 0.5-96 h; wherein the concentration of the aromatic dithiol compound in the solvent is pref. 0.005-0.05 mol/L when a cyclic compound is to be synthesized; and the amount of the catalyst to be used is pref. 5-10 mol% based on the total amount of the raw material compounds for the reaction.
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