Synlett 2012; 23(15): 2165-2175
DOI: 10.1055/s-0032-1316739
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© Georg Thieme Verlag Stuttgart · New York

The Application of [Bis(trifluoroacetoxy)iodo]benzene (PIFA) in the Synthesis of Nitrogen-Containing Heterocycles

Imanol Tellitu*
Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco / Euskal Herriko Unibertsitatea (UPV/EHU), 48940 Leioa, Spain, Fax: +34(94)6012748   Email: imanol.tellitu@ehu.es
,
Esther Domínguez*
Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco / Euskal Herriko Unibertsitatea (UPV/EHU), 48940 Leioa, Spain, Fax: +34(94)6012748   Email: imanol.tellitu@ehu.es
› Author Affiliations
Further Information

Publication History

Received: 05 June 2012

Accepted after revision: 27 June 2012

Publication Date:
03 September 2012 (online)


Abstract

Direct oxidation of suitably functionalized amides by application of the hypervalent iodine reagent PIFA [bis(trifluoroacet­oxy)iodo]benzene allows straightforward access to a variety of nitrogen-containing heterocycles. Comprehensive results from our group on the scope and limitations of such transformations will be highlighted.

1 Introduction

2 PIFA-Mediated Electrophilic Aromatic Amidation

3 PIFA-Mediated Olefin Amidation

4 PIFA-Mediated Alkyne Amidation

5 PIFA-Mediated Alkyne N–N and N–S Bond Formation

6 Synthetic Applications of PIFA-Mediated Heterocyclization Reactions

6.1 Synthesis of Pyrazoloquinolinones

6.2 Synthesis of Pyrrolobenzodiazepine DC-81 (17)

6.3 Synthesis of Pyrrolobenzodiazepines 71 and 77

6.4 Formal Synthesis of (±)-Clausenamide

6.5 Synthesis of Polyhydroxylated Indolizidines

7 Conclusions