Homoladderanes: A Chevron-shaped motif for molecular design
摘要:
Serial application of Ruthenium-catalysed [2 pi+2 pi] cycloaddition of DMAD followed by cyclobutadiene [4 pi+2 pi] cycloaddition is used to construct ladderanes incorporating a central norbornane. The resultant homoladderanes are chevron shaped spacer-units in which the apical angle can be varied by modification of the central methylene bridge of the norbornane unit. Synthesis of 11-oxa and 11-keto tetracyclo[4.4.1.0(2,5).0(7,6)] undeca-3,8-dien-3,4,8,9-tetraesters is reported as prototype central units for homoladderane construction.
Homoladderanes: A Chevron-shaped motif for molecular design
摘要:
Serial application of Ruthenium-catalysed [2 pi+2 pi] cycloaddition of DMAD followed by cyclobutadiene [4 pi+2 pi] cycloaddition is used to construct ladderanes incorporating a central norbornane. The resultant homoladderanes are chevron shaped spacer-units in which the apical angle can be varied by modification of the central methylene bridge of the norbornane unit. Synthesis of 11-oxa and 11-keto tetracyclo[4.4.1.0(2,5).0(7,6)] undeca-3,8-dien-3,4,8,9-tetraesters is reported as prototype central units for homoladderane construction.