Journal of the American Chemical Society
Communication
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Notes
The authors declare no competing financial interest.
ACKNOWLEDGMENTS
■
We thank the National Natural Science Foundation of China
and the National Basic Research Program of China
(2012CB821600), the “111” project (B06005) of the Ministry
of Education of China, and the Program for New Century
Excellent Talents in University (NCET-10-0516) for financial
support.
(10) For preparation of ligand 4, see: Liu, B.; Zhu, S.-F.; Wang, L.-X.;
Zhou, Q.-L. Tetrahedron: Asymmetry 2006, 17, 634.
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dx.doi.org/10.1021/ja408306a | J. Am. Chem. Soc. XXXX, XXX, XXX−XXX