Synlett 2009(18): 2885-2895  
DOI: 10.1055/s-0029-1218287
ACCOUNT
© Georg Thieme Verlag Stuttgart ˙ New York

Desymmetrization of meso-Bicyclic Hydrazines: An Efficient Strategy towards the Synthesis of Functionalized Cyclopentenes

Valiparambil Sanjayan Sajisha, Saithalavi Anas, Jubi John, Kokkuvayil Vasu Radhakrishnan*
Organic Chemistry Section, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, India
Fax: +91(471)2491712; e-Mail: radhupreethi@rediffmail.com;
Further Information

Publication History

Received 26 March 2009
Publication Date:
13 October 2009 (online)

Abstract

Desymmetrization of meso-bicyclic hydrazines offers a facile entry into the class of functionalized cyclopentenes. Various methodologies used along this direction are described in this account. Our attempts in this area proved that the palladium-catalyzed desymmetrization of these substrates with various organometallic reagents results in the formation of 3,4-disubstituted cyclopentenes.

1 Introduction and Background

1.1 Hydroarylation

1.2 Hydroboration

1.3 Acid-Catalyzed Transformations

2 Our Efforts

2.1 Reactions with Organostannanes

2.2 Reactions with Organosilanes

2.3 Reactions with Organoboronic Acids

2.4 Reactions with Organoindium Reagents

2.5 Reactivity of Pentafulvene-Derived Bicyclic Hydrazines

2.6 Reactions with Organoaluminum and Organozinc Reagents

2.7 Reactions with ortho-Functionalized Aryl Iodides

2.8 Mechanistic Pathway

3 Conclusion

42

Radhakrishnan, K. V.; Sajisha, V. S. unpublished results.