期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 23, 页码 7959-7963出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201505174
关键词
alkylidyne; alkyne metathesis; homogeneous catalysis; molybdenum; multidentate ligand
资金
- National Science Foundation [DMR-1055705]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1055705] Funding Source: National Science Foundation
Alkyne metathesis catalysts composed of molybdenum(VI) propylidyne and multidentate tris(2-hydroxylbenzyl) methane ligands have been developed, which exhibit excellent stability (remains active in solution for months at room temperature), high activity, and broad functionalgroup tolerance. The homodimerization and cyclooligomerization of monopropynyl or dipropynyl substrates, including challenging heterocycle substrates (e.g., pyridine), proceed efficiently at 40-55 degrees C in a closed system. The ligand structure and catalytic activity relationship has been investigated, which shows that the ortho groups of the multidentate phenol ligands are critical to the stability and activity of such a catalyst system.
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