Highly Chemo-, Regio-, and Enantioselective Rhodium-Catalyzed Cross-Cyclotrimerization of Two Different Alkynes with Alkenes
作者:Jun Hara、Mana Ishida、Masayuki Kobayashi、Keiichi Noguchi、Ken Tanaka
DOI:10.1002/anie.201310336
日期:2014.3.10
It has been established that a cationic rhodium(I)/(R)‐tol‐binap complex catalyzes the cross‐cyclotrimerization of silylacetylenes, di‐tert‐butyl acetylenedicarboxylates, and acrylamides with excellent chemo‐, regio‐, and enantioselectivities. Unsymmetrical alkynoates can also be employed in place of di‐tert‐butyl acetylenedicarboxylate for this process, but with reduced chemoselectivity.
现已确定,阳离子铑(I)/(R)-甲苯基-二萘酚配合物可催化具有优异的化学,区域和对映选择性的甲硅烷基乙炔,二叔丁基乙炔二羧酸酯和丙烯酰胺的交叉环三聚。不对称炔烃也可用于取代乙炔二羧酸二叔丁酯,但化学选择性降低。