Synthesis 2010(21): 3649-3656  
DOI: 10.1055/s-0030-1258227
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Trapping the π-Allylpalladium Intermediate from Fulvene-Derived Azabicyclic Olefin with Soft Nucleophiles

Rani Rajan, Jubi John, Sreeja Thulasi, Nayana Joseph, K. V. Radhakrishnan*, R. C. Sawant
Organic Chemistry Section of Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST)-CSIR, Trivandrum 695 019, India
Fax: +91(471)2491712; e-Mail: radhupreethi@rediffmail.com;
Further Information

Publication History

Received 17 June 2010
Publication Date:
25 August 2010 (online)

Abstract

A facile method for the synthesis of a new class of disubstituted alkylidenecyclopentenes has been introduced. The methodology involves the palladium-catalyzed ring opening of pentafulvene-derived bicyclic hydrazines with phenols and active methylene compounds, furnishing 1,4-disubstituted alkylidenecyclopentenes in good yield. The utility of multiple points of functionalization was effectively demonstrated by the synthesis of a substituted cyclopentanone and 2-hydrazinofulvene.