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The reaction mixtures were assayed by a Shimadzu GC 2010
model with a flame ionization detector and a chiral column
(20% permethylated b-cyclodextrin 30 m ¥ 0.25 mm ¥ 0.25 mm)
from Hewlett Packard (USA). The split ratio was 100 : 1. The
injector and the detector were both kept at 250 ◦C. The carrier
gas was nitrogen at 3.0 mL min-1. The column temperature was
held at 140 ◦C for 10 min and was raised to 145 ◦C at a rate of
1 ◦C min-1, and then kept constant for 4 min. The retention times
for n-nonane, MOAP, (R)-MOPE and (S)-MOPE were 2.00,
17.00, 17.70 and 18.20 min, respectively. The initial reaction
rate, the maximum yield and the product e.e. were all calculated
according to the GC data. All reported data were averages of
experiments conducted at least in duplicate and the average error
for the results was less than 1.0%.
´
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Acknowledgements
We wish to thank the National Natural Science Foundation of
China (Grant No. 20602013; 20676043; 20876059) for financial
support. We are also grateful to Dr Xue-Hui Li (Department of
Chemical Engineering, South China University of Technology,
China) for the generous gift of some ILs used in this work.
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