1,1-Alkenylboration of diarylphosphino-enynes: convenient synthetic entry to vicinal P/B Lewis pairs at extended conjugated pi-frameworks

摘要

Alkenylboranes R-CHvCH-B(C6F5)(2) undergo carbon-carbon coupling by means of 1,1-alkenylboration with diarylphosphino-enynes to give substituted conjugated hexatriene derivatives that bear a vicinal pair of B(C6F5)(2) Lewis acid and PAr2 Lewis base functionalities at their central carbon portions. A series of six examples was prepared and all compounds were characterized by X-ray diffraction. Consecutive reactions of two selected examples were carried out.

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