Racemic tricarbonyl[7-methoxy-2-(η6-phenyl)chromane]chromium(0)
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چکیده
منابع مشابه
Racemic tricarbonyl[7-methoxy-2-(η6-phenyl)chromane]chromium(0)
In the title compound, [Cr(C(16)H(16)O(2))(CO)(3)], the Cr(0) atom of the Cr(CO)(3) unit is coordinated to the phenyl ring of the flavan ligand in an η(6) mode, with a normal arene-to-metal distance. The Cr(CO)(3) unit exhibits a three-legged piano-stool conformation, while the dihydro-pyran ring displays a distorted envelope configuration. The phenyl ring is twisted away from the fused ring sy...
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IN THE TITLE COMPOUND [SYSTEMATIC NAME: tricarbonyl(η(6)-7-methoxy-2-phenyl-3,4-dihydro-2H-1-benzopyran)chromium(0)], [Cr(C(16)H(16)O(2))(CO)(3)], the Cr(CO)(3) unit is coordinated by the phenyl-ene ring of the flavan ligand, exhibiting a three-legged piano-stool conformation, with a point to plane distance of 1.750 (1) Å. The phenyl ring is twisted away from the fused ring system by 36.49 (5)°...
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The structure of the title compound, [Cr(C(10)H(12)O(2))(CO)(3)], is presented. The distorted piano-stool geometry features an off-center Cr(CO)(3) fragment which reduces contact with the dioxolane ring. The dioxolane ring, in twisted conformation, is syn-oriented towards the Cr(CO)(3) moiety.
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Straightforward conversion of (+)-6,8-dimethoxy-3,4-dihydro-3- undecylisocoumarin (3) to the title isocoumarin was carried out. Hydrolytic ring opening of (3) afforded the hydroxy acid (4) which was immediately oxidized to keto acid (5) using chromic acid, Cyclodehydration of (5) afforded the 6,8- dimethoxy-3-undecylisocoumarin (6) which on selective demethylation of 8- methoxy group furni...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online
سال: 2011
ISSN: 1600-5368
DOI: 10.1107/s1600536811008683