In(OTf)3-Catalyzed Cascade Cyclization for Construction of Oxatricyclic Compounds
摘要:
A highly diastereoselective cascade cyclization reaction has been developed for establishing a series of oxatricyclic compounds using Chan's diene and simple keto H alkynal substrates with only 1 mol % of In(OTf)(3) as the catalyst in 82-92% yields. The potential utility of this synthetic strategy has been demonstrated in model studies for the construction the core structures of 1 alpha,8 alpha:4 alpha,5 alpha-diepoxy-4,5-dihydroosmitopsin and cortistatin
A Gold-Catalyzed Cascade Reaction Involving an Unusual Intramolecular Redox Process
作者:José Barluenga、Amadeo Fernández、Félix Rodríguez、Francisco J. Fañanás
DOI:10.1002/chem.200901557
日期:2009.8.17
Gold catalysis: Secondary 5‐hexyn‐1‐ol derivatives react with indoles and other heteroaromatic compounds under gold‐catalyzed conditions to give the corresponding ketone derivative (see scheme) through a cascade reaction involving an initial intramolecular hydroalkoxylation reaction of the triple bond followed by an intermolecular hydroarylation reaction and an unusual intramolecular Oppenauer‐type
A Ring Closing Metathesis Approach to the Formal Synthesis of (+)‐Callyspongiolide
作者:Kwang‐Yoon Ko、Zoe E. Wilson、Daniel P. Furkert、Margaret A. Brimble
DOI:10.1002/cctc.202001139
日期:2020.11.19
An enantioselective synthesis of macrocyclic core of (+)‐callyspongiolide is described, constituting a formalsynthesis of this natural product. The synthetic strategy constructs the 14‐membered macrocyclic domain via Yamaguchi esterification followed by a challenging ring‐closingmetathesis (RCM) to effect the final formation of the macrolactone.