pyran

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pyran

 [pi´ran]
a cyclic compound in which the ring consists of 5 carbon atoms and 1 oxygen atom.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

py·ran

(pī'ran),
A cyclic compound that may be considered the formal parent of sugars with an oxygen bridge from carbon atoms 1-5 (the pyranoses).
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
Singh, A synthetic entry into fused pyran derivatives through carbon transfer reactions of 1,3-oxazinanes and oxazolidines with carbon nucleophiles, Tetrahedron, 52, 14273 (1996).
Khidre, "Production of pyrans , pyridazines , pyrimidines , pyrazines and triazine compounds using benzoylacetonitriles as a precursor," Journal of the Iranian Chemical Society, vol.
Kolekar, An Efficient Protocol for Synthesis of tetrahydrobenzo [b] pyrans using Amino Functionalized Ionic Liquid, C.
[beta]-Keto sulfones are versatile synthetic intermediates used for the preparation of diverse classes of organic compounds such as substituted acetylenes, olefins, allenes, vinyles, and pyrans. The chemistry of [beta]-keto sulfones achieved a significant peak of interest during the last decades and nowadays constitutes a whole branch of organosulfur chemistry [1-3].
Khan, "One-pot three-component reaction for the synthesis of pyran annulated heterocyclic compounds using DMAP as a catalyst," Tetrahedron Letters, vol.