Highly enantioselective hydrogenation of diketene with the catalytic system derived from RuCl[(S)- or (R)-binap](benzene)}Cl and triethylamine or with Ru2Cl4[(S)- or (R)-binap]2(NEt3)[binap = 2,2â²-bis(diphenylphosphino)-1,1â²-binaphthyl] in tetrahydrofuran gives optically active 4-methyloxetan-2-one in up to 97% selectivity and 92% enantiomeric excess (e.e.).
高对映选择性的二酮氢化反应使用从RuCl[(S)-或(R)-binap](苯)}Cl和
三乙胺衍生的催化体系,或使用Ru2Cl4[(S)-或(R)-binap]2(NEt3)[binap = 2,2′-双(
二苯基膦) -1,1′-联
萘]在
四氢呋喃中进行,可以获得光学活性的4-甲氧基
乙烯酮,选择性最高可达97%,对映体过量(e.e.)为92%。