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Ring‐Closing Metathesis of (η 5 ‐Alkenylcyclopentadienyl)(alkenylphosphine)manganese(I) Dicarbonyl Complexes
Author(s) -
Tseng YaYi,
Kamikawa Ken,
Wu Qian,
Takahashi Tamotsu,
Ogasawara Masamichi
Publication year - 2015
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.201500343
Subject(s) - chemistry , cyclopentadienyl complex , manganese , ligand (biochemistry) , metathesis , intramolecular force , salt metathesis reaction , ruthenium , medicinal chemistry , ring closing metathesis , reaction mechanism , polymer chemistry , stereochemistry , catalysis , organic chemistry , polymerization , receptor , biochemistry , polymer
The ruthenium‐catalyzed ring‐closing metathesis (RCM) reactions of various [η 5 ‐(ω‐alkenyl)cyclopentadienyl](ω‐alkenylphosphine)manganese(I) dicarbonyl complexes were examined. The RCM reaction between an η 5 ‐allyl‐ or an η 5 ‐vinyl‐cyclopentadienyl ligand and an allyldiphenylphosphine ligand in the manganese coordination spheres gave the corresponding cyclized products in good to excellent yields. The X‐ray analyses of the two cyclized products revealed the structural differences between the C 3 ‐ and the C 4 ‐bridged complexes. The RCM reactions of the o ‐bromo‐substituted manganese complexes were also operative and the cyclized products were obtained in excellent yields of >95%. The preferential formation of the C 4 ‐bridged species over the C 3 ‐bridged analogues in the RCM of the manganese complexes was confirmed by an intramolecular competitive RCM experiment with the [η 5 ‐1‐(methallyl)‐2‐(2‐propenyl)cyclopentadienyl](allyldiphenylphosphine)manganese(I) dicarbonyl complex.