Marco Toscanini

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The cycloaddition between methyl (E)-2-oxo-4-aryl-3-butenoates (2 a-d) and cyclopentadiene, in addition to the expected normal Diels-Alder (DA) adducts endo-3 a-d and exo-4 a-d, gives the less expected endo-5 a-d products of the [4+2] hetero-Diels-Alder (HDA) reaction in which the alpha-ketoester behaves as a heterodiene. If a comparison is made between the(More)
The asymmetric Friedel-Crafts reaction between a series of substituted indoles 2 a-l and methyl (E)-2-oxo-4-aryl-3-butenoates 3 a-c has been efficiently catalyzed by the scandium(III) triflate complex of (4'S,5'S)-2,6-bis[4'-(triisopropylsilyl)oxymethyl-5'-phenyl-1',3'-oxazolin-2'-yl]pyridine (pybox; 1). Substituted 4-(indol-3-yl)-2-oxo-4-arylbutyric acid(More)
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