253431-90-2Relevant academic research and scientific papers
Multicomponent Linchpin Couplings. Reaction of Dithiane Anions with Terminal Epoxides, Epichlorohydrin, and Vinyl Epoxides: Efficient, Rapid, and Stereocontrolled Assembly of Advanced Fragments for Complex Molecule Synthesis
Smith III, Amos B.,Pitram, Suresh M.,Boldi, Armen M.,Gaunt, Matthew J.,Sfouggatakis, Chris,Moser, William H.
, p. 14435 - 14445 (2003)
The development, application, and advantages of a one-flask multicomponent dithiane linchpin coupling protocol, over the more conventional stepwise addition of dithiane anions to electrophiles leading to the rapid, efficient, and stereocontrolled assembly of highly functionalized intermediates for complex molecule synthesis, are described. Competent electrophiles include terminal epoxides, epichlorohydrin, and vinyl epoxides. High chemoselectivity can be achieved with epichlorohydrin and vinyl epoxides. For vinyl epoxides, the steric nature of the dithiane anion is critical; sterically unencumbered dithiane anions afford SN2 adducts, whereas encumbered anions lead primarily to SN2′ adducts. Mechanistic studies demonstrate that the SN2′ process occurs via syn addition to the vinyl epoxide. Integration of the multicomponent tactic with epichlorohydrin and vinyl epoxides permits the higher-order union of four and five components.
Multicomponent Linchpin Couplings of Silyl Dithianes: Synthesis of the Schreiber C(16-28) Trisacetonide Subtarget for Mycoticins A and B
Smith III, Amos B.,Pitram, Suresh M.
, p. 2001 - 2004 (2008/02/11)
(Matrix Presented) An efficient synthesis of trisacetonide (+)-11, the Schreiber C(16-28) subtarget for mycoticins A and B, is described. The key synthetic transformation entails a one-flask, five-component linchpin coupling tactic.
