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    • 6. 发明授权
    • Asymmetric hydrogenation of 1,1,1-trifluoroacetone
    • 1,1,1-三氟丙酮的不对称氢化
    • US07504544B2
    • 2009-03-17
    • US11879644
    • 2007-07-18
    • Kurt PuentenerPius Waldmeier
    • Kurt PuentenerPius Waldmeier
    • C07C29/14
    • C07C29/145C07B2200/07C07C31/38
    • The invention relates to the preparation of enantiomerically pure (S)-1,1,1-trifluoro-2-propanol by asymmetric hydrogenation of 1,1,1-trifluoroacetone which process comprises hydrogenating 1,1,1-trifluoroacetone in the presence of a ruthenium phosphine complex catalyst represented by formula Ru(E)(E′)(L)(A) wherein E, E′ are both chloro or E is hydrogen and E′ is BH4; L is a chiral diphosphine ligand; and A is an optionally chiral diamine wherein hydrogenation occurs in the presence of a weak base, with or without an additive, when E and E′ are both chloro or b) in the absence of a base and an additive when E and E′ are hydrogen and BH4.
    • 本发明涉及通过1,1,1-三氟丙酮的不对称氢化制备对映异构纯的(S)-1,1,1-三氟-2-丙醇,该方法包括在存在下氢化1,1,1-三氟丙酮 由式<β在线式描述=“在线式”中的钌膦配合物催化剂结束=“铅”→Ru(E)(E')(L)(A) 其中E,E'均为氯或E为氢,E'为BH4;式为“In-Line Formulas”end =“tail” L是手性二膦配体; 并且A是任选的手性二胺,其中当E和E'都是氯时,或在不存在碱和添加剂的情况下,当E和E'都是氯时,或b)当E和E'是 氢和BH4。