Bis(thiazole) pincerpalladiumcomplexes showed efficient catalyticactivity for the Suzuki–Miyaura coupling of aryl halides, allowing the synthesis of biaryls with very high turnover numbers and turnover frequencies. The complexes were successfully applied in the scalable and green synthesis of the key intermediates of bioactive LUF5771 and its analogues.
The ipso-substitution of one (or two) hydroxy groups of phloroglucinol with arene nucleophiles (e.g., o-xylene, tetralin, biphenyl) can be achieved easily under Friedel-Crafts-type conditions with or without the use of organic solvents affording a variety of 3,5-dihydroxybiphenyls (57-89% yields). The new method has significant practical advantages compared to classical biaryl-coupling routes.