Synthesis 2015; 47(12): 1791-1798
DOI: 10.1055/s-0034-1380013
paper
© Georg Thieme Verlag Stuttgart · New York

Iron(III)-Catalyzed Prins Cyclization towards the Synthesis of trans-Fused Bicyclic Tetrahydropyrans

Sixto J. Pérez
a   Instituto Universitario de Bio-Orgánica ‘Antonio González’ (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
,
Pedro O. Miranda
b   Instituto de Productos Naturales y Agrobiología, CSIC, C/Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain   Email: jipadron@ipna.csic.es
,
Daniel A. Cruz
a   Instituto Universitario de Bio-Orgánica ‘Antonio González’ (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
,
Israel Fernández
c   Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
,
Víctor S. Martín*
a   Instituto Universitario de Bio-Orgánica ‘Antonio González’ (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
,
Juan I. Padrón*
a   Instituto Universitario de Bio-Orgánica ‘Antonio González’ (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
b   Instituto de Productos Naturales y Agrobiología, CSIC, C/Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain   Email: jipadron@ipna.csic.es
› Author Affiliations
Further Information

Publication History

Received: 10 December 2014

Accepted: 13 January 2015

Publication Date:
18 February 2015 (online)


Abstract

trans-Fused bicyclic tetrahydropyrans have been synthesized through an intramolecular Prins cyclization catalyzed by iron(III). The cyclization process is stereoselective, leading exclusively to an all-cis configuration in the newly generated ring. This useful methodology allows for easy access to a variety of bicyclic ethers present in a wide range of bioactive natural products. Remarkably, the cyclization reaction works well when more challenging aldehydes bearing a functional group, such as a double bond or an acetate, are used. In addition, we present a computational study which rationalizes the results and explains the complete cis stereoselectivity in the newly formed tetrahydropyran ring.

Supporting Information