| 摘要 |
NEW MATERIAL:The compound of formula (R1-R3) are aromatic group; at least one of them is substituted phenyl having a substituent group having positive electrophilic substitution constant (ESC) at m- or p-position and the sum of each ESC is >=0.3). EXAMPLE:3-Chlorophenyldiphenylmethyl methacrylate. USE:A monomer for the production of optically active methacrylate polymer. The monomer is >=50 times more stable than triphenylmethyl methacrylate, and the polymer produced therefrom is expected to be useful as a filler for optical resolution having excellent solvolysis resistance and hydrolysis resistance. PREPARATION:The compound of formula can be produced e.g. by heating and refluxing methyl m-chlorobenzoate and phenylmagnesium bromide in anhydrous ether for 1hr, cooling with ice, adding chilled water dropwise to the reaction system, and collecting the separated other layer by decantation.
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