Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2005-06-07
2005-06-07
Desai, Rita (Department: 1626)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S165000, C544S064000
Reexamination Certificate
active
06903043
ABSTRACT:
The present invention relates to chiral salen catalysts and a process for preparing chiral compounds from racemic epoxides by using them. More particularly, the present invention is to provide a chiral polymeric salen catalyst and its use for producing chiral compounds such as chiral epoxides and chiral 1,2-diols economically in high yield and high optical purity by performing stereoselective hydrolysis or racemic epoxides.
REFERENCES:
patent: 4408063 (1983-10-01), Baldwin et al.
patent: 5071868 (1991-12-01), Leinert
patent: 5637739 (1997-06-01), Jacobsen et al.
patent: 5663393 (1997-09-01), Jacobsen et al.
patent: 5665890 (1997-09-01), Jacobsen et al.
patent: 5929232 (1999-07-01), Jacobsen et al.
patent: 6639087 (2003-10-01), Larrow et al.
patent: 0 431 970 (1991-06-01), None
patent: 07-145157 (1995-06-01), None
patent: 2000-302772 (2000-10-01), None
patent: WO 91/14694 (1991-10-01), None
patent: WO 00/09463 (2000-02-01), None
Seiichi Takano, et al., “Practical Synthesis of (R)-γ-Amino-β-Hydroxybutanoic Acid (GABOB) from (R)—Epichlorohydrin,” Tetrahedron Letters, vol. 28, No. 16, pp. 1783-1784 (1987).
D. Scott Coffey, et al., “Preparation of (3S)-N,N-1,7-Bis-tert-butoxycarbonyl-3-hydroxyspermidine in High Enantiomeric Purity,” J. Org. Chem., vol. 64. No. 23, pp. 8741-8742 (1999).
J.J. Baldwin, et al., “Synthesis of (R)-and (S)-Epichlorohydrin,” J. Org. Chem., vol. 43, No. 25, pp. 4876-4878 (1978).
Akihiro Orita, et al., “Distannoxane-Catalyzed Selective Acetylation of 3-Chloropropane-1,2-diol: A Convenient Synthesis of Enantiopure Epichlorohydrin,” Synlett, No. 12, pp. 1927-1929 (1999).
Makoto Tokunaga, et al., “Asymmetric Catalysis with Water: Efficient Kinetic Resolution of Terminal Epoxides by Means of Catalytic Hydrolysis,” Science, vol. 277, pp. 936-938 (Aug. 15, 1997).
C.S. Marvel and N. Tarköy, “Heat Stability Studies on Chelates from Schiff Bases of Salicylaldehyde Derivatives,” JACS, vol. 79, pp. 6000-6002 (1957).
Kristien B.M. Janssen, et al., “A Dimeric Form of Jacobsen's Catalyst for Improved Retention in a Polydimethylsiloxane Membrane,” Tetrahedron: Asymmetry, vol. 8, No. 20, pp. 3481-3487 (1997).
Xiaoquan Yao, et al., “Enantioselective epoxidation of Olefins Catalyzed by Two Novel Chiral Poly-salen-Mn (III) Complexes,” Tetrahedron Letters, vol. 41, pp. 10267-10271 (2000).
Kim Geon-Joong
Kim Seong Jin
Lee Ho Seong
Park Dae-Woon
Desai Rita
Finnegan Henderson Farabow Garrett & Dunner LLP
Rstech Co., Ltd.
Shiao Robert
LandOfFree
Chiral polymeric salen catalyst, and a process for preparing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chiral polymeric salen catalyst, and a process for preparing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chiral polymeric salen catalyst, and a process for preparing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3475927