Diastereoselective Synthesis of Cyclopenta[c]chromanones via Pd0-Catalyzed [3+2] Cycloaddition
Krishna Biswas1, Subrata Malik1, Venkataraman Ganesh1
1Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
Abstract:
A straightforward method for synthesizing cyclopenta[c]chromanones is demonstrated. The strategy involves a [3+2] cycloaddition of VCPs and activated coumarins under Pd-catalyzed conditions. The reaction provides the desired products bearing up to four consecutive stereocenters with high diastereocontrol. Control experiments and density functional theory studies support the proposed mechanism and the observed diastereoselectivity in the product through a thermodynamically controlled pathway.
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