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Sayan Sarkar Dr. Piyali Sarkar Sandip Munshi Prof. Pradyut Ghosh 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(25):7307-7314
Selectivity of aryl iodo over ethynyl iodo toward the Suzuki cross coupling reaction is explored by utilizing a palladium complex of amino-ether heteroditopic macrobicycle. Subsequently, unreacted ethynyl iodide undergoes homocoupling reaction in the same catalytic atmosphere, thereby representing a cascade dual C−C coupling reaction. Furthermore, this approach is extended for novel one-pot synthesis of unsymmetrical 1,3-diynes. 相似文献
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N. Kent Dalley Weiming Jiang Geng Wu Jerald S. Bradshaw Haoyun An Krzysztof E. Krakowiak Reed M. Izatt 《Journal of inclusion phenomena and macrocyclic chemistry》1992,12(1-4):333-339
The crystals structure of a K+-diptychand-15C5-18C6 iodide complex has been determined from X-ray data. The complexed bicyclic molecule crystallizes in the triclinic space group
witha = 9.995(4) Å,b = 10.097(4) Å,c = 13.725(6) Å, = 90.12(3)°, = 93.62(4)°, = 97.56(3)°. The structure was solved using heavy atom methods and refined toR = 0.032 for 3262 independent reflections. In the crystal structure, the K+ lies between the two crown ether rings, and is coordinated by the nine donor atoms of the ligand molecule. The complexation properties of the ligand with K+ and Na+ were studied by titration calorimetry in 90% (v/v) MeOH/H2O solution. The studies indicate the formation of 1 : 1 ligand : metal ion complexes in both solid state and solution.This paper is dedicated to the memory of the late Dr C. J. Pedersen. 相似文献
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