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Difluoroboroxymolybdenum Fischer Carbene Complexes as Precursors of Acyl Radicals: Dimerization and Trapping with Electron‐Deficient Alkenes
Author(s) -
Barluenga José,
Rodríguez Félix,
Fañanás Francisco J.
Publication year - 2000
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20000602)6:11<1930::aid-chem1930>3.0.co;2-8
Subject(s) - decarbonylation , chemistry , carbene , radical , boron trifluoride , photochemistry , medicinal chemistry , organic chemistry , catalysis
Pentacarbonyl acyl molybdates 1 react with boron trifluoride to give difluoroboroxy Fischer carbene complexes 2 , which undergo loss of the metal fragment at room temperature to form 1,2‐diketones 3 , 1,2‐hydroxy ketones 4 , or dimers 5 through a dimerization or decarbonylation‐dimerization process of acyl radicals. Decomposition of 2 in the presence of electron‐deficient alkenes 11 and 18 furnishes the two‐, three‐, and four‐component coupling products 12, 13, 19, 20 , and 21 .