Tetrahedron Letters p. 41 - 44 (1997)
Update date:2022-08-11
Topics:
Dias, Adelson de O.
Augusti, Rodinei
Dos Santos, Eduardo N.
Gusevskaya, Elena V.
Limonene (1) was converted in one step into two diastereoisomers of 4,8-dimethyl-bicyclo[3.3.1]non-7-en-2-ol (2), useful as perfumes, employing PtCl2(PPh3)2/PPh3/SnCl2 and PtCl2(diphosphine)/PPh3/SnCl2 systems as bifunctional catalysts whose diphosphines were 1,3-bis(diphenylphosphino)propane (dppp) and 1,4-bis(diphenylphosphino)butane (dppb). In the presence of the PtCl2(dppb)/PPh3/SnCl2 system, which was found to be the most promising combination, the selectivity for 2 reached the value of 82% at 95% conversion of 1.
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