Synthesis of Stereodefined Borylated Dendralenes through Copper-Catalyzed Allylboration of Alkynes
Eva Rivera-Chao1, Martín Fañanás-Mastral1
1Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago, de Compostela, Spain.
Abstract:
An efficient method to access diversely substituted borylated dendralenes from simple and readily available materials is reported. This method is based on a multicomponent copper-catalyzed allylboration of alkynes with diboron and a 1,4-dibromo-2-butene which provides bromo- and boron-substituted skipped dienes with a remarkable chemo-, stereo-, and regioselectivity. These products can be easily transformed into dendralenic organoboronates, which display an extremely versatile reactivity as demonstrated by novel selective transformations.
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