Synthesis of Tetrahydroisoquinocarbazoles via C-2 Alkylation of Indoles with 2-Alkoxycyclopropanoate Esters
摘要:
A concise method for the synthesis of several tetrahydroisoquinocarbazole derivatives is reported, where the core is prepared in six steps from tryptophol in 51% overall yield. The pentacyclic analogs are constructed via a dipolar C-2 alkylation of a 3-substituted Indole with a 2-alkoxycyclopropanoate ester and a SmBr2-HMPA mediated ketyl-alkene ring closure.
Synthesis of Tetrahydroisoquinocarbazoles via C-2 Alkylation of Indoles with 2-Alkoxycyclopropanoate Esters
摘要:
A concise method for the synthesis of several tetrahydroisoquinocarbazole derivatives is reported, where the core is prepared in six steps from tryptophol in 51% overall yield. The pentacyclic analogs are constructed via a dipolar C-2 alkylation of a 3-substituted Indole with a 2-alkoxycyclopropanoate ester and a SmBr2-HMPA mediated ketyl-alkene ring closure.