Preparation of the first gem-dialkylthio-analogues of Meisenheimer complexes from troponoids
Abstract
Both the labile gem-dialkylthio-adduct (2) of attack of methanethiolate at C(2) of 2-methylthio-5-nitrotropone and its spiro analogue (1), which is in equilibrium with the prevailing non-cyclized form, have been obtained; the absence of the 5-nitro-group leads either to non-gem-adducts or to no adduct at all.