Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 16400-32-1, is researched, Molecular C5H7Br, about Atom-Economical Ni-Catalyzed Diborylative Cyclization of Enynes: Preparation of Unsymmetrical Diboronates, the main research direction is boronic ester diboronate preparation borylation cyclization enyne nickel catalyst; unsym vinylboronate preparation diborylative cyclization enyne cyclometalated nickel complex; crystal structure unsym vinyl diboronate nickel cyclometalated monovalent complex; mol structure unsym vinyl diboronate nickel cyclometalated monovalent complex.Application of 16400-32-1.
We report a Ni-catalyzed diborylative cyclization of enynes that affords carbo- and heterocycles containing both alkyl- and alkenylboronates. The reaction is fully atom-economical, shows a broad scope, and employs a powerful and inexpensive catalytic Ni-based system. The reaction mechanism seems to involve activation of the enyne by Ni(0) through oxidative cyclometalation of the enyne prior to diboron reagent activation. An unprecedented dinuclear bis(organometallic) Ni(I) intermediate complex was isolated.
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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics