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Citation: Gao Lianxun, Ding Mengxian. SYNTHESS OF TWO NOVEL CHIRAL 1, 6-DIPHOSPHINES[J]. Chinese Journal of Applied Chemistry, ;1989, 6(1): 26-29. shu

SYNTHESS OF TWO NOVEL CHIRAL 1, 6-DIPHOSPHINES

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 8 April 1988
Available Online: 9 July 1988

Two novel chiral diphosphines, 1, 6 -bis(diphenyl-phosphino)-2, 3, 4, 5- dibenzylidene-D-mannitol and 1, 6-bis-(diphenylphosphino)-3, 4-benzylidene- 2, 5-methylene-D-mannitol have been synthesized from D-mannitol. The Rh(I) complexes of both chiral ligands have been used as catalysts in the asymmetic hydrogenation of α-acetamidocinnamic acid, but no enantioselectivity was observed in both cases, furthermore, no hydrogenation activity was Shown in the reaction in the presence of the former ligand.A preliminary explanation of the results observed in asymmetrie hydrogenation is suggested in the paper.
- D-mannitol,
- Chiral diphosphine,
- Asymmetric hydrogenation
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