ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The chloroform solvate of uncarine C (pteropodine), (1′S,3R,4′aS,5′aS,10′aS)-1,2,5′,5′a,7′,8′,10′,10′a-octahydro-1′-methyl-2-oxospiro[3H-indole-3,6′(4′aH)-[1H]pyrano[3,4-f]indolizine]-4′-carboxylic acid methyl ester, C21H24N2O4·CHCl3, has an absolute configuration with the spiro C atom in the R configuration. Its epimer at the spiro C atom, uncarine E (isopteropodine), (1′S,3S,4′aS,5′aS,10′aS)-1,2,5′,5′a,7′,8′,10′,10′a-octahydro-1′-methyl-2-oxospiro[3H-indole-3,6′(4′aH)-[1H]pyrano[3,4-f]indolizine]-4′-carboxylic acid methyl ester, C21H24N2O4, has Z′ = 3, with no solvent. Both form intermolecular hydrogen bonds involving only the oxindole, with N...O distances in the range 2.759 (4)–2.894 (5) Å.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108270101000932
Permalink