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    • 6. 发明授权
    • Process for the preparation of optically active 1-aminophosphonic acid
derivatives and novel phosphonate compounds
    • 光学活性1-氨基膦酸衍生物和新型膦酸酯化合物的制备方法
    • US6084123A
    • 2000-07-04
    • US043678
    • 1998-05-20
    • Masakatsu ShibasakiHiroaki SasaiYoshihiro Tahara
    • Masakatsu ShibasakiHiroaki SasaiYoshihiro Tahara
    • C07F9/38C07F9/40C07F9/44
    • C07F9/4006C07F9/3808
    • Provided is a process for the preparation of an optically active (R)- or (S)-1-aminophosphonic acid derivative of the general formula (Ia) or (Ib) given below, which process comprises reacting an amino-protected imine having general formula (II): R.sup.1 --N.dbd.CHR.sup.2 where R.sup.1 is diphenylmethyl group or the like and R.sup.2 is an alkyl group or the like, with a phosphonic acid ester in the presence of an asymmetric catalyst consisting of a rare earth element-alkali metal-binaphthol complex, to produce an (R)- or (S)-N-protected-1-aminophosphonate compound, and then subjecting the phosphonate compound to catalytic reduction with hydrogen and to acidic hydrolysis. ##STR1## There are also provided novel intermediates, and a process of preparing an asymmetric catalyst consisting of a rare element-alkali metal-binaphthol complex.
    • PCT No.PCT / JP96 / 02794 Sec。 371日期:1998年5月20日 102(e)日期1998年5月20日PCT 1996年9月26日PCT公布。 公开号WO97 / 11954 日期1997年4月3日提供了制备下述通式(Ia)或(Ib)的光学活性(R) - 或(S)-1-氨基膦酸衍生物的方法,该方法包括使氨基 具有通式(II)的保护的亚胺:R1-N = CHR2其中R1是二苯基甲基等,R2是烷基等,与膦酸酯在由稀土组成的不对称催化剂存在下 元素 - 碱金属 - 联萘酚络合物,制备(R) - 或(S)-N-保护的1-氨基膦酸酯化合物,然后使膦酸酯化合物用氢气进行催化还原和酸性水解。 还提供了新颖的中间体,以及制备由稀有元素 - 碱金属 - 萘酚络合物组成的不对称催化剂的方法。
    • 8. 发明授权
    • Catalyst for asymmetric synthesis
    • 不对称合成催化剂
    • US5336653A
    • 1994-08-09
    • US970867
    • 1992-11-03
    • Masakatsu ShibasakiHiroaki Sasai
    • Masakatsu ShibasakiHiroaki Sasai
    • B01J31/22C07C201/12C07C205/15C07C205/16B01J31/00
    • B01J31/223B01J31/0212B01J31/0214B01J2231/341B01J2531/0266B01J2531/37
    • The present invention provides a catalyst for asymmetric synthesis prepared from a dialkali metal salt of an optically active 2,2'-dihydroxy-1,1'-binaphthyl represented by the formula (I.sub.R) ##STR1## or the formula (I.sub.S) ##STR2## (wherein M is Li, K or Na), a lanthanum compound represented by LaX.sub.3 (X is F, Cl, Br, I, NO.sub.3 or CH.sub.3 CO.sub.2) and an alkali metal alkoxide or an alkali metal hydroxide represented by MOR or MOH (M is Li, K or Na, and R is isopropyl or t-butyl), respectively, in the presence of a water-containing solvent. The catalyst of the present invention is extremely valuable as a catalyst for asymmetric synthesis of an asymmetric nitroaldol reaction useful in the synthesis of a .beta.-hydroxynitro compound which is an important synthetic raw material for an optically active compound such as a medicine.
    • 本发明提供一种由式(1R)表示的光学活性2,2'-二羟基-1,1'-联萘的二碱金属盐制备的不对称合成催化剂(IR)或式(I )(其中M为Li,K或Na),LaX 3(X为F,Cl,Br,I,NO 3或CH 3 CO 2)表示的镧化合物和碱金属醇盐或碱金属氢氧化物 分别通过MOR或MOH(M是Li,K或Na,R是异丙基或叔丁基)。 本发明的催化剂作为用于不对称合成不对称硝基醛醇反应的催化剂是非常有价值的,该反应可用于合成β-羟基硝基化合物,β-羟基硝基化合物是光学活性化合物如药物的重要合成原料。