transfer hydrogenation of flavanones and ortho‐hydroxychalcones catalyzed by ruthenium pincer complexes RuCl(CNNPh)(disphosphine) has allowed the synthesis of ortho‐hydroxy 1,3‐diarypropanols in 80–88 % yield, under mild reaction conditions and short reaction times (1 h) in 2‐propanol. The amount of the co‐catalyst NaOiPr has been found crucial for the selective reduction of flavanones to ortho‐hydroxy 1
钌钳络合物RuCl(CNNPh)(二膦)催化的黄烷酮和邻羟基查尔酮的转移氢化反应在温和的反应条件下和较短的反应时间下以80-88%的产率合成了邻羟基1,3-二丙醇( 1 h)在2-丙醇中的溶液。已发现助催化剂NaO i Pr的量对于将黄烷酮选择性还原为邻羟基1,3-二丙醇与黄烷-4-醇至关重要。初步结果表明,使用带有(S,R)-Josiphos的钳式催化剂,黄烷酮以中等转化率(36%)和高达92%ee还原为相应的(S)-醇。
MURPHY W. S.; WATTANASIN S., J. CHEM. SOC. PERKIN TRANS., PART 1, 1980, NO 7, 1567-1577