New strategy for the synthesis of the taxane diterpenes: Formation of the BC-rings of taxol via a [5+2]-pyrylium ylide-alkene cyclization, ring expansion strategy
The BC-rings of taxol can be synthesized using an intramolecular [5+2]-pyrylium ylide-alkene cyclization, followed by gem-methylcyclopropanation and reductive cleavage of the internal cyclopropane bond.
[EN] METHODS, COMPOSITIONS, AND COMPOUNDS FOR THE REDUCTION OF ILLEGAL METHAMPHETAMINE PRODUCTION<br/>[FR] PROCÉDÉS, COMPOSITIONS, ET COMPOSÉS POUR RÉDUIRE LA PRODUCTION ILLÉGALE DE MÉTHAMPHÉTAMINES
申请人:JOHNSON BRENT A
公开号:WO2013036567A2
公开(公告)日:2013-03-14
Disclosed herein are compounds and methods for using prodrugs of pseudoephedrine and ephedrine to inhibit illegal methamphetamine synthesis.