The reaction of the flavonol 3,7,3', 4'-tetra-O-methylquercetin (1) and of the isoflavone 7,4'-di-O-methylgenistein (2) with alkaline iodine in methanol afforded four new iodine derivatives: 8-iodo-5-hydroxy-3,7,3', 4'-tetramethoxy- flavone (1a) and 6-iodo-5-hydroxy-3,7,3', 4'-tetramethoxyflavone (1b) from 1; 2 afforded a mixture of two compounds, identified as a racemic mixture of (+/-)-trans-5-hydroxy-2,3,7,4'-tetramethoxy-8-iodo-isoflavanone (2a) and (+/-)-trans-5-hydroxy-2,3,7,4'-tetramethoxy-6,8-diiodo-isoflavanone (2b). The formation of these different products reveals a significant difference involving the chemical interaction between the reactive site of alpha, beta-unsaturated ketones of flavonol and isoflavone under the tested reaction conditions (using I2/KOH/MeOH). Furthermore, the trans stereo selectivity is noteworthy in the nucleophylic addition of methanol at the isoflavone alpha, beta-unsaturated system. The structures were identified on the basis of spectral data, mainly 1D and 2D NMR and mass spectra.
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http://dx.doi.org/10.1590/s0001-37652009000100004 | DOI Listing |
Quant Imaging Med Surg
January 2025
Department of Radiology, Fudan University Shanghai Cancer Center, Shanghai, China.
Background: The major of anticancer therapies induce a wide spectrum of cardiotoxic effects. Early identification of anticancer treatment-associated cardiotoxicity is critical to informing decisions on subsequent interventions. Myocardial extracellular volume (ECV) has been proposed as a useful parameter for quantifying the early cardiotoxicity of cancer-related treatment.
View Article and Find Full Text PDFNeurosurg Rev
January 2025
Neurosurgery Division, Department of Surgery, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Nigeria.
Ventriculoperitoneal (VP) shunting is frequently associated with complications of which shunt-related infections are the most common. However, controversies still exist regarding the underlying factors. This study comparing peri-operative skin preparation agents was aimed at determining which factors among previously documented determinants of shunt infection are implicated in our practice setting.
View Article and Find Full Text PDFNarra J
December 2024
Department of Urology, Dr. Soetomo General Academic Hospital, Surabaya, Indonesia.
Contrast-induced acute kidney injury is a common complication marked by reduced kidney function within 48 hours of contrast administration. The aim of this study was to evaluate renal function, anatomy, and molecular changes at 24 hours, 48 hours, and 72 hours post-iodinated contrast media (ICM) administration. This true-experimental study used a post-test-only control group design.
View Article and Find Full Text PDFActa Cir Bras
January 2025
Universidade Federal Rural de Pernambuco - Programa de Pós-Graduação em Medicina Veterinária - Departamento de Morfologia e Fisiologia Animal - Recife (PE) - Brazil.
Purpose: To evaluate whether the effectiveness of topical antiseptic solutions in restoring skin continuity solutions is related to their antimicrobial action or to their action in maintaining moisture, in dogs undergoing elective surgeries.
Methods: Forty dogs, 20 males and 20 females, underwent orchiectomy and oophorectomy, respectively. Thereafter, the animals were allocated into four groups (n = 5) and treated with different topical solutions: polyhexanide 0.
J Bone Joint Surg Am
January 2025
Adult Reconstruction and Joint Replacement, Hospital for Special Surgery, New York, NY.
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Methods: MSSA and E.
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