Hostname: page-component-7b7567c8c-tnzcf Total loading time: 0 Render date: 2026-11-14T19:42:07.352Z Has data issue: false hasContentIssue false

Structure Re-determination of LASSBio-294 – a cardioactive compound of the N-acylhydrazone class – using X-ray powder diffraction data

Published online by Cambridge University Press:  14 November 2013

Fanny N. Costa
Affiliation:
Laboratório de Instrumentação Nuclear/COPPE, Universidade Federal do Rio de Janeiro, C.P. 68.509, CEP 21941-972, Rio de Janeiro, RJ, Brazil
Fabio Furlan Ferreira
Affiliation:
Centro de Ciências Naturais e Humanas (CCNH), Univerisdade Federal do ABC (UFABC), Av. dos Estados, 5001, CEP 09210-580, Santo André, SP, Brazil
Tiago F. da Silva
Affiliation:
Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, RJ, BrazilPrograma de Pós-Graduação em Química, Instituto de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ, Brazil
Eliezer J. Barreiro
Affiliation:
Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, RJ, BrazilPrograma de Pós-Graduação em Química, Instituto de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ, Brazil
Lídia M. Lima
Affiliation:
Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, RJ, BrazilPrograma de Pós-Graduação em Química, Instituto de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ, Brazil
Delson Braz
Affiliation:
Laboratório de Instrumentação Nuclear/COPPE, Universidade Federal do Rio de Janeiro, C.P. 68.509, CEP 21941-972, Rio de Janeiro, RJ, Brazil
Regina C. Barroso
Affiliation:
Instituto de Física, Universidade do Estado do Rio de Janeiro (UERJ), CEP 20550-900, Rio de janeiro, RJ, Brazil

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

Many N-acylhydrazone derivatives synthetized in LASSBio® cannot be prepared as single crystals of sufficient size and/or quality for structure determination to be carried out using single crystal X-ray diffraction techniques. This article highlights the opportunity for determining crystal structures of this class of compounds directly from powder diffraction data. For this task, the crystal structure of LASSBio-294 was re-determined by means of conventional X-ray powder diffraction data and so, compared with the crystal structure already determined for single crystal data. LASSBio-294 is a cardioactive compound of the N-acylhydrazone class, which can become part of the therapeutic interventions designed to decrease exertional fatigue, and, consequently, improve the quality of life of patients suffering from chronic heart failure. Its final crystal structure was refined by means of the Rietveld method (Rietveld, 1967; 1969). This drug crystallizes in a monoclinic (P21/c) space group, with unit cell parameters a = 11.3413(3) Å, b = 12.3573(4) Å, c = 9.0158(3) Å, β = 89.821(2)°, V = 1263.55(7) Å3, Z = 4, Ź = 1 and ρcalc = 1.4419(1) g cm−3. The goodness-of-fit indicator and R-factors were, respectively: χ2 = 1.203, R Bragg  = 0.696%, R wp  = 5.59%, R exp  = 4.65% and R p  = 4.18%. The molecules in LASSBio-294 are H-bonded along the c-axis involving the atoms N(3)–H(8)···O(4).

Information

Type
Technical Articles
Copyright
Copyright © International Centre for Diffraction Data 2013