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.
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.