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Controlling cyclization pathways in palladium(ii)-catalyzed intramolecular alkene hydro-functionalization via substrate directivity.

ABSTRACT: We report a series of palladium(ii)-catalyzed, intramolecular alkene hydrofunctionalization reactions with carbon, nitrogen, and oxygen nucleophiles to form five- and six-membered carbo- and heterocycles. In these reactions, the presence of a proximal bidentate directing group controls the cyclization pathway, dictating the ring size that is generated, even in cases that are disfavored based on Baldwin's rules and in cases where there is an inherent preference for an alternative pathway. DFT studies shed light on the origins of pathway selectivity in these processes.

SUBMITTER: Wang X

PROVIDER: S-EPMC8914520 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Controlling cyclization pathways in palladium(ii)-catalyzed intramolecular alkene hydro-functionalization <i>via</i> substrate directivity.

Wang Xin X Li Zi-Qi ZQ Mai Binh Khanh BK Gurak John A JA Xu Jessica E JE Tran Van T VT Ni Hui-Qi HQ Liu Zhen Z Liu Zhonglin Z Yang Kin S KS Xiang Rong R Liu Peng P Engle Keary M KM

Chemical science 20200922 41

We report a series of palladium(ii)-catalyzed, intramolecular alkene hydrofunctionalization reactions with carbon, nitrogen, and oxygen nucleophiles to form five- and six-membered carbo- and heterocycles. In these reactions, the presence of a proximal bidentate directing group controls the cyclization pathway, dictating the ring size that is generated, even in cases that are disfavored based on Baldwin's rules and in cases where there is an inherent preference for an alternative pathway. DFT stu ...[more]

PMID: 35382446

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