1-Adamantyl methacrylate

synthetischeThe preparation of 1-adamantyl methacrylate is as follows:Stirrer, air inlet tube,Dean-Stark type water separator,Necked flask equipped with a stirrer, a thermometer,1-Adamantanol 100 g(0.657 mol),Methoquinone0.581 g,Hydroquinone0.143 g,Methacrylic acid227 g (2.64 mol) andMethylcyclohexaneWas added.After adding 1.61 g (0.0164 mol) of concentrated sulfuric acid,While blowing air at 10 mL / min, the mixture was stirred at a temperature of 100 to 115 ° C. for 4 hours under azeotropy of methylcyclohexane and water.4 hours laterThe conversion of 1-adamantanol was 95.1%.at this pointMethacrylic anhydride10.1 g (0.0657 mol / 2.0 equivalents to residual 1-adamantanol) was added,The mixture was further stirred for 1 hour,The reaction was terminated.The residual amount of 1-adamantanol after the reaction was 0.2%.The reaction solution was cooled to room temperature,313 g of a 20% by mass sodium hydroxide aqueous solution was added dropwise,The organic phase was washed.further,And washed twice with 100 mL of pure water.After distilling off the solvent with an evaporator, distillation under reduced pressure at 1 torr and 90 ° C.,122 g (yield 84.1%) of a colorless transparent liquid was obtained.This liquid was analyzed by GC and GPC.According to GC analysis1-Adamantyl acrylateThe purity of 99.5%.