Diastereotopic group selectivity and chemoselectivity of alkylidene carbene reactions on 8-oxabicyclo[3.2.1]oct-6-ene ring systems
作者:Kevin R. Munro、Louise Male、Neil Spencer、Richard S. Grainger
DOI:10.1039/c3ob41390j
日期:——
spirocyclic dihydrofurans, 1,2-rearrangement to an alkyne and fragmentation to a ketone are competing major pathways for 2-benzyloxy-substituted 8-oxabicyclo[3.2.1]oct-6-ene systems. Dihydrofuran formation is shown to be a result of substitution on the oxabicyclic ringsystem through comparison with other methods of alkylidene carbene formation.
Nonaflates from 8-Oxabicyclo[3.2.1]oct-6-en-3-ones as Building Blocks for Diversity-Orientated Synthesis: Preparation, Heck-Couplings and Subsequent Diels-Alder Reactions
substituted furan derivatives was observed. Several Diels–Alderreactions of the bicyclic dienes were conducted leading to polycyclic compounds. Whereas the diastereofacial selectivity with respect to the oxygen or sulfur bridge of the dienes is excellent, the exo/endo selectivity strongly depends on the substitution patterns of the bicyclic diene and the dienophile. The results presented demonstrate
Synthesis of Enantiopure C-Glycosides and Pseudo C-Glycosides. Lewis Acid Mediated Cleavage of [3.3.1] Oxabicyclic Lactones
作者:Oliver Gaertzen、Andrea M. Misske、Peter Wolbers、H. M. R. Hoffmann
DOI:10.1055/s-1999-2752
日期:1999.7
SYNTHESIS OF 2a-BENZYLOXY-8-OXABICYCLO[3.2.1]OCT-6-EN-3-ONE BY [4 + 3] CYCLOADDITION
作者:Vidal-Pascual, María、Martínez-Lamenca, Carolina、Hoffmann、Long, Timothy E.、Miller, Marvin J.
DOI:10.15227/orgsyn.083.0061
日期:——
Oxazatricyclic Noradamantanes: Stereocontrolled Synthesis of Functionalized Scopolines, Related Cage Molecules, and Drug Leads
作者:María Vidal Pascual、Steffen Proemmel、Winfried Beil、Rudolf Wartchow、H. M. R. Hoffmann
DOI:10.1021/ol048603t
日期:2004.11.1
Scopolines 4 and the noradamantane scaffold are accessible from8-oxabicyclo[3.2.1]oct-6-en-3-ones such as 6 by a concise route involving introduction of an axial amino nitrogen at C3, epoxidation, and cyclization. The resulting cage molecules are versatile drug leads.