Boronic esters are versatile building blocks extensively used in organic chemistry and essential to a variety of coupling reactions. In this work, the hydroboration reactions of alkynes were performed without metal catalysts using concomitant microwave irradiation that allowed a significantly reduced reaction time. Another interesting outcome of this study was that the reaction could be carried out under solvent-free conditions, highlighting the environmentally-friendly nature of our method. A wide scope of aryl- and alkylboronic acid pinacol esters were easily synthesized from the corresponding alkynes.

中文翻译：

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微波辐射下炔烃的无溶剂和无金属硼氢化

硼酸酯是广泛用于有机化学的通用结构单元，对于各种偶联反应必不可少。在这项工作中，炔烃的硼氢化反应在不使用金属催化剂的情况下使用伴随的微波辐射进行，这大大缩短了反应时间。这项研究的另一个有趣的结果是，该反应可以在无溶剂条件下进行，这突出了我们方法的环境友好性质。很容易从相应的炔烃中合成各种芳基硼酸和烷基硼酸频哪醇酯。