polymer-supported osmium catalyst has been developed. The catalyst was prepared from commercially available polysulfone, based on a microencapsulation technique and was employed in the asymmetric dihydroxylation of various olefins using (DHQD)2PHAL as the chiral ligand and NMO as the co-oxidant in H2O–acetone–CH3CN (1:1:1). The catalyst was recovered by simple filtration and was reused to obtain excellent yields with
已经开发了基于聚砜的新型聚合物负载的catalyst催化剂。该催化剂是基于微囊化技术,由市售的聚砜制备的,并用于(
DHQD)2 PHAL作为手性
配体,NMO作为H 2 O-
丙酮-CH 3中的助氧化剂,用于各种烯烃的不对称二羟基化反应。CN(1:1:1)。通过简单的过滤回收催化剂,并重复使用以获得高达五倍的良好对映选择性的优异产率。