One-Pot Conversion of 1-Bromo-β-carboline and 1-Bromocarbazole into Pentacyclic Compounds by Suzuki Cross-Coupling Followed by Spontaneous Cyclization
作者:Franz Bracher、André Gehring、Tim Tremmel
DOI:10.1055/s-0033-1338591
日期:——
This work describes a straightforward one-pot conversion of 1-bromo-beta-carboline and 1-bromocarbazole into pentacyclic compounds. Suzuki cross-coupling with various 2-methoxycarbonylphenylboronic acids was followed by spontaneous lactamization to give the target products. Coupling of 1-bromo-beta-carboline with 2-formylphenylboronic acid also gave the oxo product through oxidative cyclization, whereas in the carbazole series, the intermediate hemiaminals undergo a disproportionation reaction to give both the oxo and the methylene product.
Synthesis of a Triaza Analogue of Crushed-Fullerene by Intramolecular Palladium-Catalyzed Arylation
作者:Berta Gómez-Lor、Antonio M. Echavarren
DOI:10.1021/ol048760s
日期:2004.8.1
Alkylation and intramolecular palladium-catalyzed arylation allows for the ready synthesis of C57H33N3 from symmetrical triindole, a triaza analogue of truxene.