N¹-Acetyl-3'-methylandrosta-4,16-dieno[16,17-d]pyrazole-3-one

Authors

Sergey V. Lindeman, Marquette UniversityFollow
Alexandr I. Yanovsky, Institute of Organoelement Compounds
Ezequiel Huipe Nava, Instituto Tecnologico de Morelia
Alexey V. Kamernitzky, Institute of Organic ChemistryFollow
Alina V. Skorova, Institute of Organic Chemistry
Irina V. Vesela, Institute of Organic Chemistry

Document Type

Article

Language

eng

Publication Date

1994

Publisher

International Union of Crystallography

Source Publication

Acta Crystallographica Section C

Source ISSN

0108-2701

Abstract

In an attempt to find the structural features promoting the thermal isomerization of the N-acylated steroid [16,17-d]pyrazoles into [17,16-c]pyrazole derivatives,the X-ray structure analysis of the title compound, C₂₃H₃₀N₂O₃, (1), has been carried out. The steroid moiety of (I) has the usual conformation. The dihedral angle between the planar pyrazole ring and the N-acetyl group is very small [5.6 (2)°], but the amide C-N bond seems to be substantially elongated [1.404 (3) Å ]. The d-pyrazole ring junction via a double bond leads to deformations of some bond and torsion angles, which would be decreased in the case of a ring junction via a single bond in the [17, 16-c]pyrazole isomer.

Comments

Published version. Acta Crystallographica Section C, Vol. 50 (1994): 2054-2056. DOI. © 1994 International Union of Crystallography. Used with permission.

Recommended Citation

Lindeman, Sergey V.; Yanovsky, Alexandr I.; Nava, Ezequiel Huipe; Kamernitzky, Alexey V.; Skorova, Alina V.; and Vesela, Irina V., "N¹-Acetyl-3'-methylandrosta-4,16-dieno[16,17-d]pyrazole-3-one" (1994). Chemistry Faculty Research and Publications. 592.
https://epublications.marquette.edu/chem_fac/592