1,4-Dipole-metalated quinone strategy to (.+-.)-4-demethoxydaunomycinone and (.+-.)-daunomycinone. Annelation of benzocyclobutenedione monoketals with lithioquinone bisketals
1,4-Dipole-metalated quinone strategy to (.+-.)-4-demethoxydaunomycinone and (.+-.)-daunomycinone. Annelation of benzocyclobutenedione monoketals with lithioquinone bisketals
A stereoselective approach to the synthesis of tetracycline antibiotics
作者:Lori A. Spangler、John S. Swenton
DOI:10.1039/c39860000828
日期:——
functionalized β-vinylacyl anion equivalent with benzocyclobutenedione monoacetal, followed by methyl-lithium addition, yields a tricyclic structure having the requisite stereochemistry for elaboration to tetracyclines, as confirmed by a single crystal X-ray structure determination.