Structure of camphor-derived chiral auxiliary and method for...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C514S387000

Reexamination Certificate

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07579482

ABSTRACT:
The present invention discloses a structure of camphor-derived chiral auxiliary with a general formula (I),wherein R1and R2groups are independently hydrogen or C1to C10alkyl, X group is oxygen, two hydrogen atoms, or sulfur, and Y group is a functional group with stereo effect. Moreover, this invention also discloses a method for forming the above-mentioned chiral auxiliary.

REFERENCES:
Yang, et al, Tetrahedron Letters, 41 (2000) 1453-1456.
Chapuis, et al., Tetrahedron: Asymmetry, 11 (2000)4581-4591.
Yang et al., Organic Letters, 2(6) (2000) 729-731.
Yang, et al., J. Org. Chem., 66 (2001) 1676-1679.
Pan, et al., Tetrahedron Letters 45 (2004) 2541-2543.
Accession No. 1963:20867, CAPLUS abstract of Kuusinen, T et al. “Cyclofenchenecarboxylic acid,” Suomen Kemistilehti B (1962), 35B (No. 3).
Accession No. 1963:20866 CAPLUS abstract of Witek, S. et al, “Sulfate Turpentine. I. Composition of the 155-86 degree terpenes fraction.” Chem. Stosowana (1962), vol. 6.

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