Pyridinedithioesters as Heterodienophiles: Application to the Synthesis of Aprikalim
摘要:
Pyridinedithioesters can be used as efficient heterodienophiles when activated by complexation with BF3, by protonation, or by oxidation of the nitrogen atom of the pyridine moiety. The hetero-Diels-Alder reaction using 3-pyridinedithioester as a heterodienophile was the key step in a new synthesis of Aprikalim in racemic form. The methodology can be reliably extended to prepare new analogues of Aprikalim.
Efficient New Protocol to Synthesize Aromatic and Heteroaromatic Dithioesters
作者:Serge Masson、Isabelle Abrunhosa、Mihaela Gulea
DOI:10.1055/s-2004-822311
日期:——
A very efficient, high yielding procedure to synthesize substituted aromatic and heteroaromatic dithioesters is described. It involves the reaction between (phenylsulfonyl)methyl (hetero)aromatic derivatives and elemental sulfur in basic medium, followed by alkylation.
Pyridinedithioesters can be used as efficient heterodienophiles when activated by complexation with BF3, by protonation, or by oxidation of the nitrogen atom of the pyridine moiety. The hetero-Diels-Alder reaction using 3-pyridinedithioester as a heterodienophile was the key step in a new synthesis of Aprikalim in racemic form. The methodology can be reliably extended to prepare new analogues of Aprikalim.