Synthesis 2011(13): 2054-2061  
DOI: 10.1055/s-0030-1260608
FEATUREARTICLE
© Georg Thieme Verlag Stuttgart ˙ New York

Short Domino Sequence to Dioxa[4.3.3]propellanes

Joaquin Barjaua, Gregor Schnakenburgb, Siegfried R. Waldvogel*a
a Institute for Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
Fax: +49(6131)3926777; e-Mail: waldvogel@uni-mainz.de;
b X-ray Analysis Department, Institute for Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
Further Information

Publication History

Received 22 February 2011
Publication Date:
26 May 2011 (online)

Abstract

A variety of dioxa[4.3.3]propellanes are efficiently obtained starting from a dehydrotetramer of 2,4-dimethylphenol. The final installation of the phenol component requires a domino sequence based on electrophilic substitution and a ketalization process. The molecular structure of these dioxa[4.3.3]propellanes was elucidated by 2D NMR techniques as well as X-ray analysis of suitable single crystals. Most of these polycyclic products were formed with high regio- and diastereoselectivity.

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Between -10 and -78 ˚C.

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Seebach’s reagent: a mixture of phosphomolybdic acid (25 g), cerium(IV) sulfate (7.5 g), H2O (500 mL), and concd H2SO4 (25 mL).