Pyrrolide complexes

Cross-Alkane Metathesis In a parallel study on cross-alkane metathesis using supported, Ta polyhydrides [34], Schrock and coworkers recently reported the dual-catalytic, homogenous, cross-alkane metathesis of n-octane, and ethylbenzene. The authors [136] employed various W-monoaryloxide pyrrolide complexes in combination with several iridium pincer complexes. For example, employing Ir-2(H2) and W-1 with a ratio of n-octane/ethylbenzene (1 1.33, in v/v) produced the best productivity toward alkylbenzenes, with good selectivity over linear alkanes (Scheme 2.20). 

Recent Development of Mo- and W-Alkylidene Monoaryloxide Pyrrolide Complexes for Highly Z-Selective Olefin Metathesis... 

Charge-transfer complexes Dioxane, pyridine, polyvinyl, pyrrolid one, poly-2-vinvyl pyridine, polyethyleneoxide [4]... 

Yoshida et al. recently found that upon activation with MAO, bis(pyrrolide-imine)Ti complexes F13-5 could co-polymerize ethylene and NB in a highly controlled living manner at room temperature to yield co-polymers with very high molecular weights and narrow molecular weight distributions M >500000, PDI < They... 

Bis(pyrrolide-imine) complexes, with titanium, for olefin copolymers, 4, 1145... 

Iminophosphoranes, mercuration, 2, 432 (Iminophosphoranyl)ferrocenes, synthesis, 6, 202 Imino-pyrrolate systems, with zirconium, 4, 1138-1139 Imino-pyrrolides, with Zr(IV) and Hf(IV), 4, 780 Imino-pyrrolyl ligands, in chromium complexes, 5, 355 Iminosilanes, reactions, 3, 440 Imprinted complexes, on oxide surface, 12, 810 Impurities, glovebox techniques, 1, 215 Inclusion chemistry... 

Polyethylene-Wock-poly(clhylcnc-co-norbornene) (PE-fo-P(E-co-NBl ) block copolymer was successfully synthesized by a titanium complex with two non-symmetric bidentate /J-cnaminokclonalo ligands [136,137]. Bis(pyrrolide-imine)titanium complex also has the ability to produce the PE-fo-P(E-co-NBE) block copolymer. PE-fo-PS was synthesized via sequential monomer addition during homogeneous polymerization with bis(phenoxy-imine)metal catalysts [138]. 

Iridium pyrrolyl complex 247, derived from sodium pyrrolide and Ir(CO)Cl(PPh3)2 248 (see also Section 3.02.2.2.1), reacts with a variety of Si-, Sn-, B-containing substrates ultimately to produce N-substituted pyrroles 249-252 (Scheme 51) <19980M1134>. 

Pyrrolide, Pyrazolato, Enamido, and Amido Nitrogen-donor [N, N Complexes 780... 

The chromium complex 46 of benzaldehyde imine is also a good substrate for asymmetric conjugate addition of organolithium reagents, where the reaction was mediated by a stoichiometric amount of chiral diether 18 in toluene to give, following propargylic electrophile incorporation, the cyclohexadienal 48 in up to 93% ee (Scheme 13) [38]. SAMP [(S)-l-amino-2-(methoxymethyl)pyrrolid-ine] hydrazones were used effectively in diastereoselective nucleophilic additions to (arene)Cr(CO)3 complexes [39]. 

This review will focus on isolated and characterized high-oxidation state molybdenum and tungsten alkylidene and metallacyclobutane complexes. Attention will be directed largely toward monoalkoxide pyrrolide (MAP) complexes because they have yielded the majority of new results in the last several years. MAP species have been found to be especially efficient in several Z-selective olefin metathesis reactions, such as homocoupling, cross-coupling, ethenolysis, and ROMP (see Grubbs, Handbook of Metathesis, 2nd Edition, Volume 2, Chapter 7). Most of what is presented here has appeared since a review in 2009 [4]. 

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