| 摘要 |
2,2-Disubstituted 3-chloropropionic esters I <IMAGE> I where R1 and R2 are each C1-C6-alkyl, C2-C6-oxaalkyl, C2-C6-alkenyl, C2-C6-oxaalkenyl, aryl or C7-C12-aralkyl or R1-C-R2 is 5-, 6- or 7-membered ring, R3 is C2-C6-oxaalkyl, C2-C6-alkenyl, C2-C6-oxaalkenyl or C7-C12-aralkyl, are prepared by converting 2,2-disubstituted 3-hydroxypropanals II <IMAGE> II into the esterdiol III <IMAGE> III reacting this esterdiol III in the presence of a transesterification catalyst with an alcohol R3OH to give the 3-hydroxyester IV <IMAGE> IV reacting the hydroxyester IV with a stoichiometric or greater than stoichiometric amount of the thionyl chloride and thermally decomposing the product to give the chloropropionic ester I.
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