Synthesis of ruthenium-hydride complexes and preparation procedures of chiral alcohols and ketones
申请人:Nagoya Industrial Science Research Institute
公开号:US06720439B1
公开(公告)日:2004-04-13
trans-RuH(&eegr;1-BH4)[(S)-xylbinap][(S,S)-dpen] (0.00125 mmol), acetophenone (5.0 mmol), and 2-propanol (2.5 mL) were placed in an autoclave, and the resulting solution was repeatedly subject 5 times to a procedure of performing pressure reduction and argon introduction while stirring the solution for deaeration. A hydrogen tank was then connected to the autoclave, and after replacing the air inside an introduction tube with hydrogen, the pressure inside the autoclave was adjusted to 5 atmospheres and then hydrogen was released until the pressure dropped to 1 atmosphere. After repeating this procedure 10 times, the hydrogen pressure was adjusted to 8 atmospheres and stirring at 25° C. was performed for 12 hours. By concentrating the solution obtained by depressurization and subjecting the crude product to simple distillation, (R)-1-phenylethanol (yield: 95%) in the form of a colorless oily substance was obtained at an ee of 99%.
(RuH(&eegr;1-BH4)[(S)-xylbinap][(S,S)-dpen](0.00125 mmol)、苯乙酮(5.0 mmol)和2-丙醇(2.5 mL)被放入高压釜中,然后将得到的溶液在搅拌的同时进行5次压力减少和氩气引入的程序。然后将氢气罐连接到高压釜,并在用氢气替换引入管道内的空气后,调整高压釜内的压力至5大气压,然后释放氢气直至压力降至1大气压。重复此程序10次后,将氢气压力调整至8大气压,同时在25°C下搅拌12小时。通过浓缩减压得到的溶液,并将粗产品进行简单蒸馏,得到了(R)-1-苯乙醇(收率:95%),呈现为无色油状物质,其对映体纯度为99%。