Application of Oxidative Ring Opening/Ring Closing by Reductive Amination Protocol for the Stereocontrolled Synthesis of Functionalized Azaheterocycles
SYNLETT(2022)
摘要
The current Account gives an insight into the synthesis of some N-heterocyclic beta-amino acid derivatives and various functionalized saturated azaheterocycles accessed from substituted cycloalkenes via ring C=C bond oxidative cleavage followed by ring closing across double reductive amination. The ring-cleavage protocol has been accomplished according to two common approaches: a) Os-catalyzed dihydroxylation/NaIO4 vicinal diol oxidation and b) ozonolysis. A comparative study on these methodologies has been investigated. Due to the everincreasing relevance of organofluorine chemistry in drug research as well as of the high biological potential of beta-amino acid derivatives several illustrative examples to the access of various fluorine-containing piperidine or azepane beta-amino acid derivatives are also presented in the current Account.
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关键词
azaheterocycles, ring opening, ring expansion, reductive amination, fluorine
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