Structure of a dihydrooxazole oxa-bridged octalin.

R. L. Ostrander, J. Kallmerten, L. T. Rossano

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

C26H41NO7, Mr = 479.61, triclinic, P1, a = 11.894 (4), b = 12.360 (2), c = 9.969 (2) A, alpha = 106.11 (2), beta = 100.68 (2), gamma = 99.02 (2) degrees, V = 1349.5 (6) A3, Z = 2, Dx = 1.180 Mg m-3, Mo K alpha, lambda = 0.71069 A, mu = 0.079 mm-1, F(000) = 520, T = 296 K, R = 0.041, wR = 0.047 for 3196 observed unique reflections. A new approach to the total synthesis of the nargenicin macrolide system employing a [2,3] Wittig rearrangement to control the remote C16-C17 stereochemistry required characterization of a pivotal intermediate by X-ray single-crystal methods. The structure is characterized by the formation of strong intermolecular alcohol to dihydrooxazole-N hydrogen bonds, an essentially strain-free tricyclic oxa-bridged octalin nucleus, and low-energy conformations of the methoxymethyl ether side chains.

Original languageEnglish (US)
Pages (from-to)2410-2413
Number of pages4
JournalActa crystallographica. Section C, Crystal structure communications
Volume47 ( Pt 11)
DOIs
StatePublished - Nov 15 1991

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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