A straightforward, efficient, and selective method for the preparation of novel boryl-functionalized enynes or dienes via [Pt(PPh₃)₄]-catalyzed diboration of a broad spectrum of symmetrical and unsymmetrical 1,3-diynes was developed. The catalytic cycle of diboration was proposed on the basis of low-temperature ³¹P NMR studies. An alternative isolation method via product condensation on a cold finger was developed, which, in contrast to previous literature reports, eliminates the need for the additional transformation of rapidly decomposing enynyl pinacol boronates to more stable silica-based column chromatography derivatives during the separation step. To prove the efficiency of this simple catalytic protocol, bisboryl-functionalized enynes were synthesized in a gram scale and tested as useful building blocks in advanced organic transformations, such as hydrosilylation and Suzuki and sila-Sonogashira couplings. The presence of silyl, boryl, as well as other functions like halogen or alkoxy in their structures builds a new class of multifunctionalized enynes that might be modified in various chemical reactions.

中文翻译：

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[Pt(PPh3)4]-催化对称和非对称1,3-二炔的选择性Diboration

_{开发了一种通过[Pt(PPh 3} ) ₄ ] 催化的广谱对称和不对称1,3-二炔的二硼化制备新型硼基官能化烯或二烯的简单、有效和选择性的方法。在低温^{31的基础上提出了二硼化催化循环}P 核磁共振研究。开发了一种通过冷指上的产物冷凝的替代分离方法，与以前的文献报道相比，该方法消除了在分离步骤中将快速分解的烯基频哪醇硼酸酯额外转化为更稳定的硅胶柱色谱衍生物的需要。为了证明这种简单催化方案的效率，以克级合成了双硼基官能化的烯炔，并在先进的有机转化（例如氢化硅烷化和 Suzuki 和 sila-Sonogashira 偶联）中作为有用的构件进行了测试。甲硅烷基、硼基以及其结构中的其他功能（如卤素或烷氧基）的存在构建了一类新的多官能化烯炔，可以在各种化学反应中进行修饰。