phenylethynyl derivatives via Kumada cross-coupling. We present a new protocol for pyrene synthesis via transition-metal cross-couplings. The initially prepared 2,6-bis(phenylethynyl)biphenyls were transformed to pyrenes with uncommon 4,10-disubstitution through an electrophilic cyclization. The precursors were synthesized by Suzuki–Miyaura cross-coupling, which provides 2,6-dibromobiphenyls; these were subsequently
摘要 我们提出了一种通过过渡
金属交叉偶联合成pyr的新方案。最初制备的2,6-双(苯基
乙炔基)
联苯通过亲电环化反应转化为具有不常见的4,10-二取代的pyr。前体是通过Suzuki-Miyaura交叉偶联合成的,提供2,6-二
溴代
联苯。这些随后通过熊田交叉偶联与苯基
乙炔基衍
生物偶联。 我们提出了一种通过过渡
金属交叉偶联合成pyr的新方案。最初制备的2,6-双(苯基
乙炔基)
联苯通过亲电环化反应转化为具有不常见的4,10-二取代的pyr。前体是通过Suzuki-Miyaura交叉偶联合成的,提供2,6-二
溴代
联苯。这些随后通过熊田交叉偶联与苯基
乙炔基衍
生物偶联。