Hydrogenation of esters with Ru/tetradentate ligands complexes

Details Hydrogenation of esters with Ru/tetradentate ligands complexes Hydrogenation of esters with Ru/tetradentate ligands complexes

2011-08-02

2011-08-02

Witherspoon, Sikarl (Department: 1621)

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

Organic compounds

Oxygen containing

C568S599000, C568S840000, C556S021000, C564S015000, C549S423000

Reexamination Certificate

active

07989665

ABSTRACT:
The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Ru complexes with tetradentate ligands having at least one amino or imino coordinating group and at least one phosphino coordinating group in hydrogenation processes for the reduction of esters or lactones into the corresponding alcohol or diol respectively.

REFERENCES:
patent: 2004/0015017 (2004-01-01), Rautenstrauch et al.
patent: 2004/0063966 (2004-04-01), Rautenstrauch et al.
patent: 2 031 883 (1980-04-01), None
patent: WO 02/22526 (2002-03-01), None
patent: WO 02/40155 (2002-05-01), None
J-X Gao et al., XP-001038642,“New Chiral Catalysts for Reduction of Ketones”, Chirality, vol. 12, pp. 383-388 (2000).
International Search Report and Written Opinion of the International Searching Authority dated Aug. 9, 2006 from application No. PCT/IB2006/051027.

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