derivations could afford natural product-like frameworks with
multiple fused ring systems. Currently, their potential applications
in medicinal chemistry or chemical biology studies are under
investigation and more results will be reported in due course.
We are grateful for the financial support from the National
Natural Science Foundation of China (21125206 and
21021001) and the National Basic Research Program of China
(973 Program, 2010CB833300).
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MBH carbonate 2. In addition, the similar data were afforded
when S-BINOL was used.
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20 The conversion of 4a could not be significantly enhanced by
extending the reaction time.
c
This journal is The Royal Society of Chemistry 2012
Chem. Commun., 2012, 48, 2439–2441 2441