Determination of the stereochemistry of isomeric steroidal 3-spiro-isoxazolidine-[2,3-d]-oxadiazoline by circular dichroism and x-ray diffraction |
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| Authors: | S Colombi G Vecchio G Gottarelli B Samori&#x; AMManotti Lanfredi A Tiripicchio |
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| Institution: | Laboratorio di Chimica degli Ormoni del C.N.R., Via M. Bianco 9, Milano, Italy;Istituto di Chimica degli Intermedi, Viale Risorgimento 4, Bologna, Italy;Istituto di Chimica Generale ed Inorganica, Centro di Studio per la Strutturistica Diffrattometrica del C.N.R., Via M. D''Azeglio 85, Parma, Italy |
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| Abstract: | The absolute configuration of four isomeric steroidal molecules containing the isoxazolidine-2,3-d]-oxadiazoline moiety has been determined by circular dichroism and X-ray diffraction methods. This heterocyclic system adopts a cis fused structure in which the mean planes passing through the two rings form a dihedral angle of 111°. |
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