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Anna Barattucci Maria Chiara Aversa Elisa Deni Teresa Papalia Paola Bonaccorsi 《Helvetica chimica acta》2014,97(9):1237-1243
The stereoselective and efficient monoaddition of transient [(1S,2R,4R)‐2‐hydroxy‐7,7‐dimethylbicyclo[2.2.1]hept‐1‐yl]methanesulfenic (=(1S)‐isoborneol‐10‐sulfenic) acid to isomeric diethynylbenzenes affords {1‐[(1S)‐isoborneol‐10‐sulfinyl]ethenyl}ethynylbenzenes. Their enantiomerically pure (RS)‐epimers are involved in a Cu‐free Sonogashira coupling with 1,4‐diiodo‐2,5‐dimethoxybenzene to give C2‐symmetric bis‐sulfinyl phenylene ethynylenes, stimulating prototypes of new sulfurated chiral architectures that can find application as chelating agents. 相似文献
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This work reported a convenient method for the preparation of enantiomerically pure 6‐aryl‐2,2′‐dihydroxy‐1,1′‐binaphthyl derivatives starting from the commercially available (R)‐2,2′‐hydroxy‐1,1′‐binaphthyl [(R)‐ 1 ] via bromination, hydrolysis and Suzuki cross coupling reaction. This novel synthetic method was characterized with high regioselectivity, simple operation, mild reaction conditions, and excellent yield (up to 73%). On the other hand, we synthesized the target unknown compounds, which were confirmed by IR, 1H NMR, 13C NMR, MS and elementary analysis. 相似文献