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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 36, 2006 - Issue 12
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Original Articles

Synthesis and Spectral Properties of Macrocyclic Compounds Containing 1,3,4‐Thiadiazole Moeties Connected by a Carbon–Oxygen Bridge

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Pages 1801-1808 | Received 12 Dec 2005, Published online: 22 Aug 2006
 

Abstract

The syntheses of 1∶1‐macrocycles 3 (n=1), unsymmetrical macrocycle 5 (m=0, n=1), 2∶2‐macrocycle 5 (m=n=1 and 2), 3∶3 macrocycle 7, and several open‐chain ethereal compounds prepared from 2,5‐dichloro‐1,3,4‐thiadiazole 1 and various polyethylene glycols dianions are described. Structural proofs are afforded by their mass and NMR spectral features. The quaternization studies of a few macrocycles with methyl iodide at elevated temperature furnished a diketo derivative 8 through a facile Hilbert–Johnson reaction.

Acknowledgment

The research was supported by the Department of Science and Technology, Government of India, and University Grant Commission, New Delhi, in the form of grants from Fund for Improvement of Science & Technology Infrastructure (FIST) and Departmental Research Support (DRS) Programmes, respectively.

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