Acta Crystallographica Section C

Crystal Structure Communications

Volume 59, Part 6 (June 2003)

organic compounds

 

(1R,3S,6S)-6-tert-Butyl-1-hydroxymethyl-5-methoxy-6-methyl-7-oxa-4-azaspiro[2.5]oct-4-en-8-one and dimethyl [(1S,1'R,3'S,6'S)-(6'-tert-butyl-5'-methoxy-6'-methyl-8'-oxo-7'-oxa-4'-azaspiro[2.5]oct-4'-en-1'-yl)hydroxymethyl]phosphonate

M. Malecka, K. T. Wanner and E. Budzisz

Abstract: The molecules of the title compounds, C₁₃H₂₁NO₄, (I), and C₁₅H₂₆NO₇P, (II), are linked into chains along the c direction in (I) and along the b axis in (II) through O-HO hydrogen bonds. The heteroatomic ring in (I) adopts a twist-boat conformation, while that in (II) has a conformation intermediate between boat and twist-boat. The P atom has a distorted tetrahedral geometry.

Formula: C₁₃H₂₁NO₄ and C₁₅H₂₆NO₇P

	Structure factor file (CIF format) (73.0 kbytes) Contains datablock I
	Structure factor file (CIF format) (85.7 kbytes) Contains datablock II

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