作者:Geoffrey R Haas、Joseph W Kolis
DOI:10.1016/s0040-4039(98)01212-x
日期:1998.8
CO2. The metal catalyst was prepared in a simple two step, Schiff base reaction to form the salen ligand, followed by complexation to the vanadyl group. The epoxidation reactions are clean and give both high yields and good diastereoselectivity.
烯丙醇在超临界CO 2中,在钒基塞伦羰基转移催化剂存在下,用氢过氧化叔丁基环氧化。通过简单的两步Schiff碱反应形成Salen配体,然后络合至钒基,可以制备金属催化剂。环氧化反应干净,收率高,非对映选择性好。