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- W2068762259 abstract "Synthesis of Stereoisomeric 3-Substituted Cyclobutanecarboxylic Acid Derivatives The preparation of 3-substituted cyclobutanecarboxylic acids by ring forming malonic ester cycloalkylation/saponification/decarboxylation leads to 50:50 cis/trans mixtures. Only some polar ester derivatives 2 can be separated by chromatographic methods. Catalytic hydrogenation of 3-substituted cyclobutenecarboxylic acids 3, however, gives the cis acids 4 with 90–95% selectivity. Reduction of the same acids 3 by Zn in aqueous HCl/THF leads to the trans acids 6 with 90–93% selectivity." @default.
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- W2068762259 date "1990-05-11" @default.
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- W2068762259 title "Synthese von stereoisomeren 3-substituierten Cyclobutancarbonsäure-Derivaten" @default.
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- W2068762259 doi "https://doi.org/10.1002/jlac.199019900179" @default.
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