申请人:Bayer Aktiengesellschaft
公开号:US05739394A1
公开(公告)日:1998-04-14
The invention relates to novel 3,3-dioxy-4,4,4-trifluorobutyric acid derivatives of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent C.sub.1 -C.sub.10 -alkyl, or represent cyclohexyl, or represent optionally substituted C.sub.6 -C.sub.10 -aryl or C.sub.7 -C.sub.14 -arylalkyl, or R.sup.1 and R.sup.2 together represent C.sub.2 -C.sub.4 -alkylene which is optionally mono- or disubstituted by methyl, or optionally substituted ortho-arylene, R.sup.3 represents hydrogen or C.sub.1 -C.sub.10 -alkyl, or represents cycloalkyl, or represents optionally substituted C.sub.6 -C.sub.10 -aryl or C.sub.7 -C.sub.14 -arylalkyl, and X represents hydrogen, fluorine, chlorine or bromine, excluding methyl 4,4,4-trifluoro-3,3-dimethoxybutyrate, 4,4,4-trifluoro-3,3-dimethoxybutyric acid, ethyl 4,4,4-trifluoro-3,3-diethoxybutyrate, ethyl 4,4,4-trifluoro-3,3-ethylenedioxybutyrate and 4,4,4-trifluoro-3,3-ethylenedioxybutyric acid, a process for their preparation and for the preparation of further 3,3-dioxy-4,4,4-trifluorobutyric acid derivatives, as well as novel intermediates and processes for their preparation.
本发明涉及公式(I)的新型3,3-二氧基-4,4,4-三氟丁酸衍生物:
其中,R1和R2独立地表示C1-C10烷基,或表示环己基,或表示可选取代的C6-C10芳基或C7-C14芳基烷基,或R1和R2一起表示可选取代的C2-C4烷基,该烷基可以通过甲基单取代或双取代,或表示可选取代的邻位芳烃基,R3表示氢或C1-C10烷基,或表示环烷基,或表示可选取代的C6-C10芳基或C7-C14芳基烷基,X表示氢、氟、氯或溴,但不包括甲基4,4,4-三氟-3,3-二甲氧基丁酸酯、4,4,4-三氟-3,3-二甲氧基丁酸、乙酸乙酯4,4,4-三氟-3,3-二乙氧基丁酸酯、乙酸乙酯4,4,4-三氟-3,3-乙二氧基丁酸酯和4,4,4-三氟-3,3-乙二氧基丁酸。本发明还涉及它们的制备方法、进一步的3,3-二氧基-4,4,4-三氟丁酸衍生物的制备方法,以及新的中间体及其制备方法。