Abstract
3,3-Dilithio-1,1-dimethoxy-3-tosylpropane ( 6) reacts with mono and dielectrophiles to give dialkylated products 7 and carbocyclic derivatives 8, respectively. Hydrolysis of the acetal function followed by DBU dehydrosulfinylation of these products affords β,β-disubstituted propenal derivatives 11 and 12. Reductive desulfonylation of compounds 8g-j provides β,β-disubstituted propanal acetals 14.
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