2-diphenylethane-1,2-diamine (S,S-DPEN), complexes 3 and 4 were found to be active catalyst precursors for the enantioselective reduction of aryl ketones under mild conditions (room temperature and 3-4 atm of H2). The chiral alcohols were isolated in moderate to good yields and with enantioselectivities of up to 93%. The ruthenium complexes, chloro(p-cymene)(R)-(4,4',6,6'-tetramethoxybiphenyl-2,2'-diyl)bis(bis(3
摘要制备亲核二
膦配体(R)-(4,4',6,6'-四甲氧基
联苯-2,2'-二基)双(
二苯基膦)((R)-Ph-Garphos,2a)和描述了(S)-(4,4',6,6'-四甲氧基
联苯-2,2'-二基)双(
二苯基膦)((S)-Ph-Garphos,2b)。
配体用于制备
钌(II)Ph-Garphos配合物,
氯(对-异丙基)(R)-(4,4',6,6'-四甲氧基
联苯-2,2'-二基)双(
二苯基膦)
氯化
钌(II)([RuCl(p-cymene)(R)-Ph-Garphos] Cl(3))和
氯(p-cymene)(S)-(4,4',6,6'-四甲氧基
联苯- 2,2'-二基)双(
二苯基膦)
氯化
钌(II)([RuCl(对-cymene)(S)-Ph-Garphos] Cl(4))。在手性二胺共
配体的存在下(1R,2R)-
1,2-二苯乙烷-1,2-二胺(R,R-DPEN)和(1S,2S)-
1,2-二苯乙烷-1