作者:Khee Dong Eom、J. Venkat Raman、Heejin Kim、Jin Kun Cha
DOI:10.1021/ja034332q
日期:2003.5.1
A convergent synthesis of (+)-asteltoxin (1) has been achieved by the Horner-Emmons olefination of bis(tetrahydrofuran) aldehyde 53 and alpha-pyrone phosphonate 5. A key step features the stereoselective construction of a sterically congested quaternary center embedded in the densely functionalized bis(tetrahydrofuran) subunit by a Lewis acid-catalyzed, pinacol-type rearrangement of an epoxy silyl
A Practical, Stereoselective Synthesis of (<i>E</i>)- and (<i>Z</i>)-2-Bromo-2-pentenes
作者:Heejin Kim、Suk-Kwan Lee、Dongreyoul Lee、Jin Kun Cha
DOI:10.1080/00397919808005945
日期:1998.2
Abstract A short, stereoselective preparation of (E)-2-bromo-2-pentene and (Z)-2-bromo-2-pentene is described starting from trans-2-methyl-2-pentenoic acid.