- Iron(iii)-salan complexes catalysed highly enantioselective fluorination and hydroxylation of β-keto esters and N-Boc oxindoles
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Chiral iron(iii)-salan complexes catalysed highly enantioselective α-fluorination and α-hydroxylation of β-keto esters and N-Boc oxindoles to give the corresponding products in high yields and good-to-excellent ee values under mild reaction conditions. This journal is the Partner Organisations 2014.
- Gu, Xin,Zhang, Yan,Xu, Zhen-Jiang,Che, Chi-Ming
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supporting information
p. 7870 - 7873
(2014/07/08)
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- Exploitation of dinuclear salan aluminum complexes for versatile copolymerization of ε-caprolactone and l-lactide
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By combining the influence of excess alcohol, temperature and monomer-to-initiator ratios in the feed, dinuclear salan aluminum complexes LRAl2Me4 exhibited a high degree of control towards the copolymerization of l-LA and ε-CL, producing blocky, gradient, tapered and random copolymers.
- Wang, Yuan,Ma, Haiyan
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supporting information; experimental part
p. 6729 - 6731
(2012/08/14)
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- Salalen titanium complexes in the highly isospecific polymerization of 1-hexene and propylene
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All lined up: C1-symmetric octahedral titanium complexes (see structure, Ti dark gray, N blue, O red, I purple) whose labile positions reside in different electronic environments were designed using the readily available salalen ligands. With methylalumoxane as co-catalyst, highly active catalysts were obtained, which yielded high-molecular-weight polypropylene with ultra-high isotacticities (see 13C NMR spectrum) and melting transitions. Copyright
- Press, Konstantin,Cohen, Ad,Goldberg, Israel,Venditto, Vincenzo,Mazzeo, Mina,Kol, Moshe
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supporting information; experimental part
p. 3529 - 3532
(2011/05/04)
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- SALALEN LIGANDS AND ORGANOMETALLIC COMPLEXES
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Use of homogeneous catalytic systems which include as a pre-catalyst a complex of a Group IV metal and a salalen ligand in the polymerization of alpha-olefins, is disclosed. The alpha-olefin polymers obtained are characterized by controlled levels of tacticity. Also disclosed are novel salalen ligands and novel complexes thereof with Group IV metals.
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Page/Page column 49
(2012/01/06)
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- Electrophilic Substitution with Rearrangement. Part 9. Dienones derived from Brominations of o-, m-, and p-Cresol
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Regiospecific protodebromination of ring-substituted bromophenols derived from 2-, 3-, or 4-methylphenol can be effected by heating them with aqueous hydrogen iodide; the synthetic scope of this reaction has been explored.These di- and poly-bromophenols can generally be converted by further bromination in aqueous acetic acid into dienones , which have now been shown to have the 4-bromo-2,5-dienone rather than the 2-bromo-3,5-dienone structure.The rearrangemens of these dienones to ring-substituted polybromophenols by treatment with sulfuric acid have been investigated; where more than one product is formed, the regioselectivity differs from that prevailing in the corresponding direct bromination of the phenol with liquid bromine.The alternative rearrangements of these dienones in aprotic solvents with and without illumination have been compared with results obtained by reaction of methylphenols with bromine under the same conditions.Characteristic differences between the behaviours of 2-, 3-, and 4-methyl-substituted compounds reflect the specific reactions available to the particular dienones.
- Brittain, Judith M.,Mare, Peter B. D. de la,Newman, Paul A.
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