Cyclization Strategies to Polyenes Using Pd(II)-Catalyzed Couplings of Pinacol Vinylboronates
作者:Robert G. Iafe、Daniel G. Chan、Jonathan L. Kuo、Byron A. Boon、Darius J. Faizi、Tomomi Saga、Jonathan W. Turner、Craig A. Merlic
DOI:10.1021/ol3020623
日期:2012.8.17
As a complement to Pd(0)-catalyzed cyclizations, seven Pd(II)-catalyzed cyclization strategies are reported. α,ω-Diynes are selectively hydroborated to bis(boronate esters), which cyclize under Pd(II)-catalysis producing a diverse array of small, medium, and macrocyclic polyenes with controlled E,E, Z,Z, or E,Z stereochemistry. Various functional groups are tolerated including aryl bromides, and applications
作为对Pd(0)催化环化的补充,已报道了七种Pd(II)催化环化策略。α,ω-二炔选择性氢硼化成双(硼酸酯),在Pd(II)催化下环化,生成各种不同的小,中和大环多烯,并控制E,E,Z,Z或E,Z立体化学。容许包括芳基溴化物在内的各种官能团,并举例说明其应用。