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# Organic # Simple and efficient generation of aryl radicals from aryl triflates: synthesis of aryl boronates and aryl iodides at room temperatureJ. Am. Chem. Soc., Just Accepted Manuscript DOI: 10.1021/jacs.7b03538 Publication Date (Web): June 4, 2017 Wenbo Liu, Xiaobo Yang, Yang Gao, and Chao-Jun Li Abstract: Despite the wide use of aryl radicals in organic synthesis, current methods to prepare them from aryl halides, carboxylic acids, boronic acids and diazonium salts suffer from limitations. Aryl triflates, easily obtained from phenols, are promis-ing aryl radical progenitors but remain elusive in this regard. Inspired by single electron transfer process for aryl halides to access aryl radicals, we developed a simple and efficient protocol to convert aryl triflates to aryl radicals. Our success lies in exploiting sodium iodide as the soft electron donor assisted by light. This strategy enables the scalable synthesis of two types of important organic molecules i.e. aryl boronates and aryl iodides in good to high yields, with broad func-tional group compatibility in a transition metal-free manner at room temperature. This protocol is anticipated to find potential applications in other aryl radical-involved reactions by using aryl triflates as aryl radical precursor. Link to CBG： http://www./news/art?id=2912 Link to the paper： http://pubs./doi/abs/10.1021/jacs.7b03538 # MOF # Calcium L-Lactate Frameworks as Naturally Degradable Carriers for PesticidesJ. Am. Chem. Soc., Just Accepted Manuscript Abstract: Two porous, chiral metal-organic frameworks: Ca14(L-lactate)20(Acetate)8(C2H5OH)(H2O), MOF-1201, and Ca6(L-lactate)3(Acetate)9(H2O), MOF-1203, are constructed from Ca2+ ions and L-lactate [CH3CH(OH)COO-] where Ca2+ is bridged by carboxylate and hydroxyl groups of lactate, and carboxylate of acetate to give a three-dimensional arrangement of Ca(-COO, -OH) polyhedra supporting one-dimensional pores of apertures and internal diameters of 7.8 and 9.6 Å (MOF-1201), and 4.6 and 5.6 Å (MOF-1203), respectively. These MOFs represent the first examples of extended porous structures based on Ca2+ and lactate. They show permanent porosity of 430 (MOF-1201) and 160 m2 g-1 (MOF-1203), and can encapsulate an agriculturally important fumigant, cis-1,3-dichloropropene. MOF-1201 shows a 100 times slower release rate compared with liquid cis-1,3-dichloropropene under the same test conditions (25 °C, air flow rate of 1 cm3 min-1). The hydrolysis of MOF-1201 in water allows it to be the first example of degradable porous solid carrier for such fumigants. Link to CBG： http://www./news/art?id=2915 Link to the paper： http://pubs./doi/abs/10.1021/jacs.7b04542 # Material # Superconductivity in alkaline earth metal–filled skutterudites BaxIr4X12 (X = As, P).J. Am. Chem. Soc., Just Accepted Manuscript Abstract: We report superconductive iridium pnictides BaxIr4X12 (X = As and P) with a filled skutterudite structure, demonstrating that Ba filling dramatically alters their electronic properties and induces a nonmetal-to-metal transition with increasing the Ba content x. The highest superconducting transition temperatures are 4.8 and 5.6 K observed for BaxIr4As12 and BaxIr4P12, respectively. The supercon-ductivity in BaxIr4X12 can classified into the Bardeen–Cooper–Schrieffer type with intermediate coupling. Link to CBG： http://www./news/art?id=2914 Link to the paper： http://pubs./doi/abs/10.1021/jacs.7b04274 CBG资讯 ∣知识就是力量 |
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