Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1989-02-27
1990-04-03
Griffin, Ronald W.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
536121, 536122, 536124, C07F 728, C07H 2300, C07H 1504
Patent
active
049141961
ABSTRACT:
Compounds of the formulae I and Ia ##STR1## in which R.sup.1 is a group which can be transferred to carbonyl or imine compounds, for example alkyl, allyl, vinyl or the radical of an enol or enamine, R.sup.2 is, for example, cyclopentadienyl, R.sup.3 is the radical of an optically active sugar or sugar derivative, Me is Ti, Zr or Hf, x is 0, 1 or 2 and y is 0, 1, 2 or 3, M.sup..sym. is Li.sup..sym., Na.sup..sym., K.sup..sym., MgY.sup..sym., ZnY.sup..sym., CdY.sup..sym., HgY, CuY.sup..sym. or quaternary ammonium, Y being halogen, are suitable for use as chiral reactants for compounds containing aldehyde, keto and/or N-substituted imine groups.
REFERENCES:
patent: 4176228 (1979-11-01), Hartung
patent: 4490525 (1984-12-01), Hayatsu et al.
patent: 4826965 (1989-05-01), Riediker et al.
T. D. Inch et al., Tetrahedron Letters 41, 3657-3660 (1969).
A. G. Olivero et al., Helv. Chim. Acta 64, 2485-2488 (1981).
M. T. Reetz et al., Organometallics 3, 1716-1717 (1984).
D. Seebach et al., Chem. Ber. 118, 3673-3682 (1985).
Bold Guido
Duthaler Rudolf
Herold Peter
Lang Robert W.
Oertle Konrad
Ciba-Geigy Corporation
Griffin Ronald W.
O'Brien Stephen V.
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