Book ChapterDOI
Thiopyrans and Their Benzo Derivatives
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The article was published on 2020-01-01. It has received 1 citations till now. The article focuses on the topics: Ring (chemistry) & Section (typography).read more
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3-Phenyl-2-(pyrrolidin-1-yl)-5,6-dihydro-8H-thio-pyrano[4',3':4,5]thieno[2,3-d]pyrimidin-4(3H)-one.
TL;DR: In the title compound, C( 19)H(19)N(3)OS(2), the thio-pyran ring adopts a twist-chair conformation and the pyrimidinone unit is essentially planar, with a mean deviation of 0.0497 Å, while the pyrrolidine ring exhibits an envelope conformation.
Journal ArticleDOI
Identification of mesomeric substructures by through-space NMR shieldings (TSNMRS). Trimethine cyanine/merocyanine-like or aromatic π-electron delocalization?
Erich Kleinpeter,Andreas Koch +1 more
TL;DR: In this paper, the spatial magnetic properties of amino-substituted heteroaromatic six-membered ring systems such as pyrylium/thiopyryls analogues have been calculated using the GIAO perturbation method employing the nucleus independent chemical shift (NICS) concept and visualized as iso-chemical-shielding surfaces.
Journal ArticleDOI
A Diastereoselective Synthesis of Novel Multifunctional Thianes
TL;DR: The reaction of 2,2′-thiobis(1,3-diarylprop-2-en-1-ones) with malononitrile in the presence of sodium ethoxide under both thermal and solvent-free microwave conditions afforded a series of hitherto unknown 2e,6e-diaroyl-3e,5e-dimitrile-4,4-dicyanothianes diastereoselectively in good yields via a double Michael addition.
Journal ArticleDOI
Diethyl 2-{[(5-oxo-5H-thio-chromeno[2,3-b]pyridin-7-yl)amino]-methyl-idene}propane-dioate.
TL;DR: In the title compound, C15H14O2S, the three fused rings are roughly coplanar, the largest deviation from the mean plane being 0.1285 (13) Å for the S atom.
Journal ArticleDOI
Diels–Alder Reactions of 1,3-Dienes Incorporated into 8-Oxa- and 8-Thiabicyclo[3.2.1]octane Skeletons: A Convenient Access to Complex Tri- and Tetracyclic Compounds
TL;DR: In this article, the Diels-Alder reactions of eight different 1,3-dienes incorporated into an 8-oxa- or 8-thiabicyclo[3.2] octane backbone were studied employing N -phenylmaleimide as standard dienophile.