Further studies on hydration of alkynes by the PtCl4-CO catalyst
Under CO atmosphere, between 80 and 120 C, a glyme solution of PtCl{sub 4} forms a carbonyl compound that promotes hydration of internal as well as terminal alkynes to give aldehyde-free ketones. The catalytic process depends strongly on the electronic and steric nature of the substrates. Part of the carbonyl functions of the catalyst can be replaced by phosphine ligands. Chiral DIOP reacts with the PtCl{sub 4}-CO compound to give a catalyst that promotes partial kinetic resolution of a racemic alkyne. Replacement of part of the CO by polystyrene-bound diphenylphosphine enables to attach the catalyst to the polymeric support. Upon entrapment of the platinum compound in a silica sol-gel matrix, it reacts as a partially recyclable catalyst. A reformulated mechanism for the PdCl{sub 4}-CO catalyzed hydration is suggested on the basis of the present study.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of energy Research. Office of Basic Energy Sciences. Chemical Sciences Division; United States-Israel Binational Science Foundation Grant No. 96-00093 (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 837398
- Report Number(s):
- LBNL-49451; R&D Project: 400301; TRN: US200506%%106
- Journal Information:
- Journal of Molecular Catalysis A, Vol. 184, Issue 1-2; Other Information: Submitted to Journal of Molecular Catalysis A: Volume 184, No.1-2; Journal Publication Date: 06/17/2002; PBD: 18 Jan 2002
- Country of Publication:
- United States
- Language:
- English
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