Preparation of Bicyclic 1,2,4-Trioxanes from γ,δ-Unsaturated Ketones
作者:Armando P. Ramirez、Andrew M. Thomas、K. A. Woerpel
DOI:10.1021/ol8022853
日期:2009.2.5
Treatment of γ,δ-unsaturated ketones with hydrogen peroxide and acid provides a rapid entry into the medicinally important 1,2,4-trioxanestructure. Alkene substitution that stabilizes carbocationic intermediates proved to be important for the success of this transformation.
Synthesis of 2-Alkyl-2-cyclopenten-1-ones. A Versatile Kinetic Alkylation-Ozonolysis Procedure for the Preparation of γ-Ketoaldehydes
作者:Niall W. A. Geraghty、Noreen M. Morris
DOI:10.1055/s-1989-27330
日期:——
A range of 2-alkyl-2-cyclopenten-1-ones including the prostaglandin precursor 2-(6-methoxycarbonylhexyl)-2-cyclopenten-1-one and the jasmonoid precursor 2-[(Z)-2-pentenyl]-2-cyclopenten-1-one, have been prepared by a short synthetic route which begins with 6-methyl-5-hepten-2-one and generates the key 1,4-ketoaldehyde intermediates by a kinetic alkylation-ozonolysis procedure.