Comprehensive Summary
Recently, molecular ferroelectrics have attracted more and more attention due to their structural diversity, low cost of manufacture, and environmental‐friendly processing. However, most of the design strategies for molecular ferroelectrics have focused on the selection and modification of cations, and the use of anions has been rarely reported. Here, introducing distorted [CuBr4]2– tetrahedra, we obtained a high curie temperature (Tc) ferroelectric, [cyclopentylammonium]2CuBr4, with a Tc as high as 393 K, and exceeding commercial and most of reported molecular ferroelectric BaTiO3 (393 K). Variable‐temperature hysteresis loop shows the nonlinear P‐E loop of the crystal under a wide temperature range. Variable‐temperature single‐crystal X‐ray diffraction revealed that the Aizu expression can be written as mmmFmm2. In short, this work will inspire more creative strategies by exploiting the tunability of the anion module.
Abstract. The lungs are one of the most common organs to which cancer metastasizes, but are a location not common for uterine sarcoma. A malignant mixed Müllerian tumor (MMMT) of the uterus is an extremely rare and aggressive sarcoma, characterized by a mixture of epithelial and mesenchymal components. There are few reports regarding the pulmonary metastasis from MMMTs. The present study presents the case of a 58-year-old woman with hemoptysis and post-menopausal vaginal bleeding. The woman was initially diagnosed with invasive aspergillosis based on a chest computed tomography (CT) scan showing multiple pulmonary nodular opacities surrounded by a ground-glass attenuation halo (halo-sign). Diagnostic curettage and a percutaneous CT-guided lung biopsy were conducted for the pathological diagnosis. Finally, the diagnosis was confirmed as MMMT with lung metastasis based on the histopathological examination of cervical canals, uterus and lung specimens, which showed a mixture of carcinomatous and sarcomatous elements, and morphology exhibiting hyperchromatic nuclei and necrosis. Immunohistochemical staining was positive for vimentin, focally positive for p16, and negative for napsin, cytokeratin 7 (CK7), CK20, carcinoembryonic antigen, carbohydrate antigen 125, homeobox protein CDX2 and villin in the lung specimens. This case highlights that pulmonary metastatic tumor from uterine sarcoma can present as halo-sign, which is commonly observed in pulmonary aspergillosis. Therefore, it needs to be considered in the differential diagnosis of such lesions, and pathological confirmation is required.
Radical reactions
Radical reactions O 0195Improved One-Pot Synthesis of Styryl Tetrahydrofurans and Cyclohexanes by Radical Addition to β-Nitrostyrenes in the Presence of Benzoyl Peroxide. -Several styryl derivatives are obtained from the reaction of (E)-β-nitrostyrenes with radical precursors (tetrahydrofuran, THF, 1,3-dioxolane, and 5-, 6-, 7-, and 8-membered cycloalkanes) using 2.5-3.25 equivalents of benzoyl peroxide as radical initiator. Excellent (E)-selectivities are achieved in all cases. First examples of one-pot syntheses of styryl tetrahydrofurans and cyclohexanes, starting from the corresponding aldehydes, are reported. In addition, an example for a radical addition reaction mediated by benzoyl peroxide is given yielding addition product (XVII). -(JANG, Y.-J.; SHIH, Y.-K.; LIU, J.-Y.; KUO, W.-Y.; YAO*, C.-F.; Chem. Eur. J. 9 (2003) 9, 2123-2128; Dep. Chem., Natl. Taiwan Norm. Univ., Taipei 116, Taiwan; Eng.) -Klein 36-043 2003 Radical reactions
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