ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Beschreibung / Inhaltsverzeichnis:
Synthesis and Characterization of a New Class of Flavylium Salts; a Facile Route to the 2-(2-Acetoxyphenyl)-4-methylidene-4H-1-benzopyran Derivatives. X-Ray Crystal Structure of 2-(2-Acetoxy-5-methylphenyl)-4,6-dimethyl-1-benzopyranylium Pentachlorostannate: Supporting evidence of Chlorine Bridging in the Decachlorodistannate(2-) UnitSeveral mixtures of compounds 1 and 2 were synthesized from SnCl4 and p-substituted aryl acetates. Separation of 1/2 was achieved either by treatment of the mixture with MeCN providing the pure complex 1 or by reaction with MeCOCl leading selectively to a new class of flavylium salts 3 or 4. The structure of 2-(2-acetoxy-5-methylphenyl)-4,6-dimethyl-l-benzopyranylium pentachlorostannate (3a) was determined by single-crystal X-ray diffraction. The Sn-atoms are hexacoordinated in the dimeric unit Sn2Cl2-10 through Cl bridging. Furthermore, we report the easy preparation of 1-benzopyran derivatives starting from the salts 3.
Notizen:
NO ABSTRACT.
Zusätzliches Material:
1 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19880710416
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