Ligand-Controlled Selectivity in the Desymmetrization of <i>meso</i> Cyclopenten-1,4-diols via Rhodium(I)-Catalyzed Addition of Arylboronic Acids
作者:Frederic Menard、David Perez、Daniela Sustac Roman、Timothy M. Chapman、Mark Lautens
DOI:10.1021/jo100391e
日期:2010.6.18
a Rh-catalyzed asymmetric allylic substitution. Depending on the type of ligand used, each of two regioisomeric products can be obtained in good yield and excellent enantioselectivity. Under rhodium(I) catalysis, bisphosphine P-Phos ligands form trans-1,2-arylcyclopentenols as the major product, whereas Segphos ligands lead predominantly to trans-1,4-arylcyclopentenols.
的对映体选择性高desymmetrization内消旋环戊-2-烯-1,4-二乙基二碳酸酯已使用铑催化的不对称烯丙位取代显影。根据所用配体的类型,可以以良好的产率和优异的对映选择性获得两种区域异构产物中的每一种。在铑(I)催化下,双膦P-Phos配体形成反式-1,2-芳基环戊烯醇作为主要产物,而Segphos配体主要导致反式-1,4-芳基环戊烯醇。