Iron Porphyrins and Iron Salens as Highly Enantioselective Catalysts for the Ring-Expansion Reaction of Epoxides to Tetrahydrofurans
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DOI: 10.1021/acs.orglett.5c00767
Abstract: Iron porphyrins have been found to be efficient catalysts for the ring-expansion reaction of epoxides with alkenes to give the corresponding tetrahydrofurans; very low loadings (down to 1 mol %) are sufficient to achieve high… read more here.
Keywords: reaction; expansion reaction; iron porphyrins; catalysts ring ... See more keywords
Nb and Ta benzotriazole or benzoxazole phenoxide complexes as catalysts for the ring-opening polymerization of glycidol to synthesize hyperbranched polyglycerols.
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DOI: 10.1039/c7dt02839c
Abstract: A series of novel mononuclear (1a-7a and 1b-6b) as well as tetranuclear (8a and 9a) niobium (Nb) and tantalum (Ta) complexes of benzotriazole or benzoxazole phenoxide pro-ligands bearing different substituents at the ortho and para… read more here.
Keywords: ring opening; benzotriazole benzoxazole; catalysts ring; benzoxazole phenoxide ... See more keywords