Process for the preparation of enantiomerically pure 3-hydroxyoc

Details Process for the preparation of enantiomerically pure 3-hydroxyoc Process for the preparation of enantiomerically pure 3-hydroxyoc

1998-03-06

2000-01-11

Kight, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

556 16, 556 18, 556 21, 556 23, C07C 6934, C07F 1500

Patent

active

060138335

ABSTRACT:
The invention relates to a process for the preparation of compounds of the general formula I ##STR1## in which R.sup.1 and R.sup.2 are identical or different and are a C.sub.1 -C.sub.20 -alkyl group, C.sub.3 -C.sub.12 -cycloalkyl group, C.sub.7 -C.sub.12 -aralkyl group or a mono- or binuclear aryl group, in which a ketone of the formula III or IV ##STR2## in which R.sup.1 and R.sup.2 have the above meaning, is asymmetrically hydrogenated.

REFERENCES:
patent: 4916252 (1990-04-01), Sayo et al.
patent: 5530143 (1996-06-01), Balkenhohl et al.
Tai, et al., "Highly Efficient Enantio-differentiating Hydrogenation over an Ultrasonicated Raney Nickel Catalyst Modified with Tartaric Acid", J. Chem. Soc. Chem. Commun., 1991, pp. 795-796.
Tai, et al., "An Improved Asymmetrically-Modified Nickel Catalyst Prepared from Ultrasonicated Raney Nickel", Bull. Chem. Soc. Jpn. No. 67, Sep. 1994, pp. 2473-2477.

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