An efficient synthesis of diverse hetero-bis-metallated alkenes with conjugated and isolated olefin subunits is reported. Relying on those useful tin/boron reagents a convergent, palladium-catalyzed fragment coupling strategy has been developed as an elegant methodology to construct highly conjugated polyenes and stabilized olefinic analogues thereof. The utility of these reagents was further demonstrated in a concise and modular construction of extended polyene side chains of the potent polyketide antibiotic etnangien.
报道了一种高效合成多样性杂双
金属化烯烃的方法,这些烯烃具有共轭和孤立的烯烃亚单位。依靠这些有用的
锡/硼试剂,开发了一种收敛的、
钯催化的片段偶联策略,作为构建高度共轭的聚烯烃及其稳定的烯烃类似物的优雅方法。这些试剂的实用性进一步通过简明且模块化的构建强效多
酮类抗生素etnangien的延伸聚烯烃侧链得到了验证。