for the intramolecularcyclization of tertiary alcohols with terminal alkynes to form diverse aza-spirocycles. The reaction was carried out with low catalyst loading under microwave irradiation to give both sulfonylated and acylated spirocyclic nitrogen derivatives. Gram scale spirocyclization was carried out to demonstrate the robustness of the reaction. An intramolecular Mizoroki-Heck reaction was performed
Progress Towards the Total Synthesis of Trichodermamides A and B: Construction of the Oxazine Ring Moiety
作者:Xiaobo Wan、Gabriel Doridot、Madeleine M. Joullié
DOI:10.1021/ol062993x
日期:2007.3.1
Trichodermamides are modified heterocyclic dipeptides that possess a unique 4H-5,6-dihydro-1,2-oxazine ring. Starting from affordable, easily available (-)-quinic acid, the enantioselective synthesis of this oxazine moiety was achieved by an intramolecular epoxide ring-opening reaction by an oxime. [structure: see text]