Palladium??Catalysed Intramolecular Cyclisations of Olefinic Propargylic Carbonates and application to the diastereoselective synthesis of enantiomerically pure (−)?螃? …

W Oppolzer, A Pimm, B Stammen…

Index: Oppolzer, Wolfgang; Pimm, Austen; Stammen, Blanda; Hume, W. Ewan Helvetica Chimica Acta, 1997 , vol. 80, # 3 p. 623 - 639

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Citation Number: 67

Abstract

Abstract Intramolecular [Pd 2 (dba) 3]/tri (2-furyl) phosphine-catalysed (dba= dibenzylideneacetone, PhCH [DOUBLE BOND] CHCOCH [DOUBLE BOND] CHPh) cyclisations of olefinic propargylic carbonates I provided alk-1-enyl-(3-aza) bicyclo [3.1. 0]- hexanes VIII in good yields. A palladium cascade sequence I [RIGHTWARDS ARROW] II [RIGHTWARDS ARROW] III [RIGHTWARDS ARROW] IV [RIGHTWARDS ARROW] VII [ ...

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