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Hydrogenation of fluorine-containing cyclohexene derivatives, useful in preparation of liquid crystal materials, in presence of basic ion exchanger that inhibits defluorination
Hydrogenation of fluorine-containing cyclohexene derivatives, useful in preparation of liquid crystal materials, in presence of basic ion exchanger that inhibits defluorination
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机译:在抑制脱氟的碱性离子交换剂的存在下,可用于制备液晶材料的含氟环己烯衍生物的氢化
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摘要
Method for hydrogenation of specific polycyclic cyclohexene derivatives (I) and (II) to the corresponding cyclohexanes, in which a palladium-based catalyst (A) is used in presence of a basic ion exchanger. Method for hydrogenation of polycyclic cyclohexene derivatives of formulae (I) and (II) to the corresponding cyclohexanes, of formulae (III) and (IV), in which a palladium-based catalyst (A) is used in presence of a basic ion exchanger. n = 0 or 1; OY1 and OY2 = base-stable protecting groups for a keto group, optionally linked together to form a ring; L1-L4 = hydrogen or fluoro; and R = hydrogen, fluoro, chloro, trifluoromethyl, trifluoromethoxy or difluoromethoxy; with the proviso that at least one of R and L1-L4 must be fluoro.
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机译:将特定的多环环己烯衍生物(I)和(II)氢化为相应的环己烷的方法,其中在碱性离子交换剂的存在下使用钯基催化剂(A)。将式(I)和(II)的多环环己烯衍生物氢化为式(III)和(IV)的相应环己烷的方法,其中在碱性离子交换剂的存在下使用钯基催化剂(A) 。 n = 0或1; OY1和OY2 =酮基的碱稳定保护基,可选地连接在一起形成环; L1-L4 =氢或氟; R =氢,氟,氯,三氟甲基,三氟甲氧基或二氟甲氧基;条件是R和L1-L4中至少一个必须是氟。
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