An Efficient Palladium Catalyzed Stereocontrolled Synthesis of 4a-Angular Methyl Substituted Hydrofluorenes

Jayanta K. Mukhopadhyaya Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta, 700 032, India

Sitaram Pal Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta, 700 032, India

Usha Ranjan Ghatak Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta, 700 032, India

Abstract

A high yield stereoselective synthesis of 4a-angularly methyl substituted cis-hexahydrofluorenes 5a-h and tetrahydrofluorenes 7a,b has been developed by palladium-catalyzed intramolecular Heck-type cyclization of the respective exo-olefins 4a-h and 4a,b through exclusive 5-exo-trig mode.

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An Efficient Palladium Catalyzed Stereocontrolled Synthesis of 4a-Angular Methyl Substituted Hydrofluorenes

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An Efficient Palladium Catalyzed Stereocontrolled Synthesis of 4a-Angular Methyl Substituted Hydrofluorenes

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