Lewis acid-catalyzed asymmetric hetero Diels-Alder cycloaddition of a 1-thiabuta-1,3-diene with chiral N-acryloyl- and N-crotonoyl-oxazolidinone dienophiles

Article abstract of DOI:10.1016/S0040-4039(97)01354-3

Me₂AlCl- and TiCl₄-catalyzed asymmetric hetero Diels-Alder cycloaddition reactions of 2,4-diphenyl-1-thiabuta-1,3-diene with (S)-N-acryloyl- and (S)-N-crotonoyl-4-benzyl-1,3-oxazolidin-2-one dienophiles are described in which not onl