Stereocontrolled synthesis of functionalized diquinanes from Pauson-Khand-derived exo-tricyclo[5.2.1.02,6]decenones
摘要:
A 10-step sequence is described for the conversion of 4-methyl-exo-tricyclo[5.2.1.0(2,6)]deca-4,8-dien-3-one (the Pauson-Khand cycloaddition product of norbornadiene with propyne) into 3,3-dimethyl-2-[(2-methoxyethoxy)methoxy]-8-(1-methyl-2-oxopropyl)bicyclo[3.3.0]octan-6-ol. The latter diquinane, formed with complete stereocontrol and well-differentiated functionality, is appropriately substituted to serve as an entry to highly functionalized linearly fused triquinanes, although attempts to close a third five-membered ring via an enolate-epoxide ring-opening process were unsuccessful.
Stereospecific total synthesis of (±) pentenomycins by flash vacuum thermolysis of substituted tricyclo[5.2.1.02,6]decenones
作者:J.M.J. Verlaak、A.J.H. Klunder、B. Zwanenburg
DOI:10.1016/0040-4039(82)80158-5
日期:1982.1
The synthesis of 4-functionalized tricyclo[5.2.1.02,6]decenones , starting from furans, is described. These structures are shown to be suitable precursors for the synthesis of cyclopentenoids such as pentenomycin and analogs.
Stereocontrolled synthesis of functionalized diquinanes from Pauson-Khand-derived exo-tricyclo[5.2.1.02,6]decenones
作者:Susan E. MacWhorter、Neil E. Schore
DOI:10.1021/jo00001a063
日期:1991.1
A 10-step sequence is described for the conversion of 4-methyl-exo-tricyclo[5.2.1.0(2,6)]deca-4,8-dien-3-one (the Pauson-Khand cycloaddition product of norbornadiene with propyne) into 3,3-dimethyl-2-[(2-methoxyethoxy)methoxy]-8-(1-methyl-2-oxopropyl)bicyclo[3.3.0]octan-6-ol. The latter diquinane, formed with complete stereocontrol and well-differentiated functionality, is appropriately substituted to serve as an entry to highly functionalized linearly fused triquinanes, although attempts to close a third five-membered ring via an enolate-epoxide ring-opening process were unsuccessful.