PtCl2-Catalyzed Transannular Cycloisomerization of 1, 5-Enynes: A New Efficient Regio-and Stereocontrolled Access to Tricyclic Derivatives

C Blaszykowski, Y Harrak, MH Gonçalves…

Index: Blaszykowski, Christophe; Harrak, Youssef; Goncalves, Maria-Helena; Cloarec, Jean-Manuel; Dhimane, Anne-Lise; Fensterbank, Louis; Malacria, Max Organic Letters, 2004 , vol. 6, # 21 p. 3771 - 3774

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Citation Number: 69

Abstract

Transannular PtCl2-catalyzed cycloisomerizations open a new route to cyclopropanic tricyclic systems. Ketones A or C were efficiently prepared from the same cycloundec-5-en-1- yne precursor B, depending on the substituent at the propargylic position (either benzoate or methoxy).