921198-94-9Relevant articles and documents
Catalytic, asymmetric inverse electron demand hetero diels-alder reactions of o-benzoquinone derivatives and ketene enolates
Paull, Daniel H.,Wolfer, Jamison,Grebinski, James W.,Weatherwax, Anthony,Lectka, Thomas
, p. 240 - 246 (2008/02/09)
We present an array of [4+2] cycloaddition reactions between ketene enolates, catalytically derived from acid chlorides and cinchona alkaloid nucleophilic catalysts in the presence of stoichiometric base, and o-benzoquinone derivatives. These cycloadditio
Catalytic, asymmetric synthesis of 1,4-benzoxazinones: A remarkably enantioselective route to α-amino acid derivatives from o-benzoquinone imides
Wolfer, Jamison,Bekele, Tefsit,Abraham, Ciby J.,Dogo-Isonagie, Cajetan,Lectka, Thomas
, p. 7398 - 7400 (2008/01/27)
(Chemical Equation Presented) Cycloaddition of o-benzoquinone imides with chiral ketene enolates derived from cinchona alkaloid catalysts is the basis of a catalytic asymmetric synthesis of 1,4-benzoxazinones and 1,4-benzoxazines. The resulting cycloadduc