3,3‘-Br2-BINOL-Zn Complex: A Highly Efficient Catalyst for the Enantioselective Hetero-Diels−Alder Reaction
Organic Letters2002Vol. 4(24), pp. 4349–4352
Citations Over TimeTop 13% of 2002 papers
Abstract
[reaction: see text] A BINOLate-zinc complex prepared in situ from Et(2)Zn and 3,3'-dibromo-1,1'-bi-2-naphthol (3,3'-Br(2)-BINOL) was found to be a highly efficient catalyst for the enantioselective hetero-Diels-Alder reaction of Danishefsky's diene and aldehydes to give 2-substituted 2,3-dihydro-4H-pyran-4-one in up to quantitative yield and 98% ee.
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