| 摘要 |
NEW MATERIAL:A compound expressed by formula I [R is lower alkyl; Ar is phenyl, 2-(p-lower alkylsulfonyloxyphenyl)-2-propyi or p-lower alkylsulfonyloxyphenylsulfonyl]. EXAMPLE:2,2-Bis(4-methanesulfonyloxyphenyl)propane. USE:A sensitizer for heat-sensitive recording materials, excellent in coloring density, sensitivity and heat responsiveness with a great increase in concentration with increasing temperature and good in preservation stability without surface fog. PREPARATION:A 4-substituted phenol expressed by formula II (Ar' is phenyl, 2-(p-hydroxyphenyl)-2-propyl, etc.) is reacted with a lower alkylsulfonyl halide expressed by the formula RSO2X (X is halogen) in the presence of an amine to afford the compound expressed by formula I. |
