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Syntheses with organoboranes. VII. Monohydroboration of conjugated dienes with catecholborane catalyzed by complexes of nickel(II) chloride and cobalt(II) chloride with diphosphines

✍ Scribed by Marek Zaidlewicz; Jerzy Meller

Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 249 KB
Volume: 38
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(97)01691-2

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✦ Synopsis

The monohydroboration of representative conjugated dienes 1-7 with catecholborane in the presence of Smls, t-BuOSmI2, Lals, Ti(OPr')4, iron(II), nickel(lI) and cobalt(lI) chloride complexes with dppe, dppp and dppb was examined. NiC12(dppe), NiCl2(dppp) and CoC12(dppp) showed catalytic activity. The 1.2-addition products were obtained, no 1,4-addition was observed. The reactivity in the presence of NiCl2(dppe) decreased in the order acyclic dienes > cyclic dienes >> l-decene.

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