Investigation of the stereochemistry of the [3.3]-sigmatropic rearrangement of the sp-isomer of 2-allylthio-5-acetyl-6-methyl-4-(2-nitrophenyl)-3-cyano-1,4-dihydropyridine

Article abstract of DOI:10.1007/BF02291939

The reaction of the syn-periplanar conformer (the sp-isomer) of morpholinium 5-acetyl-6-methyl-4-(2-nitrophenyl)-3-cyano-1,4-dihydropyridine-2-thiolate with allyl bromide proceeds regio- and stereoselectively with the formation of the sp-isomer of the sub