6
26
Helvetica Chimica Acta – Vol. 90 (2007)
Chloro{2,2’-{(cyclohexane-1,2-diyl)bis[(nitrilo-kN)methylidyne]}bis[phenolato-kO](2ꢀ )}manga-
nese Homopolymer (1) and Chloro{2,2’-{(1,2-diphenylethane-1,2-diyl)bis[(nitrilo-kN)methylidyne]}bis-
[
phenolato-kO](2ꢀ)}manganese Homopolymer (2). Complexes 1 and 2 were synthesized by modifica-
tion of the procedure reported in [3].
Kinetic Resolution of Secondary Alcohols: General Procedure 1. A mixture of the secondary alcohol
(
0.25 mmol), catalyst 1 (0.005 mmol, based on the catalyst monomer), KBr (0.02 mmol), and H O/
2
CH Cl 2 :1 (1.5 ml) in a 5-ml tube was stirred for a few minutes at r.t. The co-oxidant PhI(OAc)
2
2
2
(
0.175 mmol) was then added, and the mixture was stirred for a further hour. The products were
extracted with Et O and the conversion and ee values were determined by GC analysis.
2
Recycling of the Polymeric Salenmanganese(III) Complex in the Kinetic Resolution Reaction:
General Procedure 2. As described in the General Procedure 1, with a-methylbenzyl alcohol (0.25 mmol),
catalyst 1 (0.005 mmol), Et NBr (0.02 mmol), H O/CH Cl 2 :1 (1.5 ml), and PhI(OAc) (0.175mmol).
4
2
2
2
2
When the reaction was complete, hexane was added to the stirred mixture, and the hexane was decanted.
The catalyst was recovered by filtration and dried before the next use.
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Received December 19, 2006