selenoxides having an opticallyactive binaphthyl skeleton work as the reagents for enantioselective oxidation of phosphines to the correspondingphosphineoxides. Treatment of a racemic 2-oxazolin-2-ylferrocenylphosphine with one of the selenoxides in carbon tetrachloride in the presence of phenol affords the correspondingphosphineoxide together with the unreacted starting phosphine, both with moderate
具有旋光联萘骨架的环状硒氧化物用作将膦对映选择性氧化成相应氧化膦的试剂。在苯酚的存在下,用四氯化碳中的一种氧化硒处理外消旋 2-恶唑啉-2-基二茂铁基膦,得到相应的氧化膦和未反应的起始膦,两者都具有中等对映选择性(氧化膦,高达 13% ee ; 膦,高达 29% ee)。
A process for the stereoselective preparation of a P-chiral four-co-ordinated phosphorus compound, the process comprising reacting a first reactant selected from the group consisting of a chiral alcohol, chiral amine or chiral thiol, with a second reactant comprising a P-chiral three-co-ordinated phosphorus compound, in the presence of an electrophile.