Process for producing 2,3-disubstituted-4-substituted cyclopenta

Details Process for producing 2,3-disubstituted-4-substituted cyclopenta Process for producing 2,3-disubstituted-4-substituted cyclopenta

1993-03-29

1994-07-12

Gerstl, Robert

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

Organic compounds

Silicon containing

560121, 562503, C07C40500, C07F 718

Patent

active

053290356

ABSTRACT:
A process for producing a 2,3-disubstituted-4-substituted cyclopentanone, an enantiomorph thereof, or a mixture of these in an arbitrary ratio.
The process comprises (A) subjecting a 4-substituted-2-cyclopentenone, an enantiomorph thereof, or a mixture of these in an arbitrary ratio, and an organocopper compound to conjugate addition-reaction, and thereafter (B) reacting the resulting enolate intermediate with a halide in the presence of a phenyl organotin compound.

REFERENCES:
Rinns, Tetrahedron Letters 26 (28) 3385 (1985).
Nishiyama, Tet Letters, 25, 2487 (1984).
Noyori Ang. Chem. Int Ed. 23, 847 (1984).
Suzuki, J. A. C. S. 107, 3348 (1985).

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