2H-1-Benzopyrans. II. 4-Chloro-3-methoxycarbonyl-2-dimethoxyphosphoryl-2H-1-benzopyran, (I), and 4-Chloro-2-dimethoxyphosphoryl-2H-1-benzopyran, (II)

Autor:	M. J. Grabowski, A. Ste¸pien, T. A. Olszak, R. Modranka, K. Kostka
Rok vydání:	1997
Předmět:	chemistry.chemical_compound chemistry Bicyclic molecule Stereochemistry Substituent Molecule General Medicine Crystal structure Ring (chemistry) Benzopyrans Benzene General Biochemistry Genetics and Molecular Biology Benzopyran
Zdroj:	Acta Crystallographica Section C Crystal Structure Communications. 53:1514-1516
ISSN:	0108-2701
DOI:	10.1107/s010827019700735x
Popis:	The pyranoid rings are in a half-boat conformation in compound (I), C 13 H 14 ClO 6 P, and in a deformed half-boat-towards-half-chair conformation in compound (II), C 11 H 12 ClO 4 P. Fusion with the pyranoid ring has no significant influence on the planarity of the benzene ring in either compound. In both structures, the dimethoxy-phosphoryl group is attached axially. The presence of the methoxycarbonyl substituent in (I) seems responsible for the disorder observed in the dimethoxyphosphoryl group.
Databáze:	OpenAIRE
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