Organic Letters
Letter
(12) When the reaction was performed with 5 mol % of 1d, the desired
product 2a was obtained in 85% yield, 95% ee with a 2a:3a ratio of 7:1.
(13) (a) Arai, S.; Shirai, Y.; Ishida, T.; Shioiri, T. Chem. Commun. 1999,
49. (b) Aggarwal, V. K.; Hynd, G.; Picoul, W.; Vasse, J.-L. J. Am. Chem.
Notes
The authors declare no competing financial interest.
Soc. 2002, 124, 9964. (c) Bako,
Pal, K. Tetrahedron: Asymmetry 2005, 16, 1861. (d) Liu, W. J.; Lv, B. D.;
́
́ ́
P.; Mako, A.; Keglevich, G.; Kubinyi, M.;
ACKNOWLEDGMENTS
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Gong, L. Z. Angew. Chem., Int. Ed. 2009, 48, 6503. (e) Liu, Y.;
Provencher, B. A.; Bartelson, K. J.; Deng, L. Chem. Sci. 2011, 2, 1301.
(f) Liu, G.; Zhang, D.; Li, J.; Xu, G.; Sun, J. Org. Biomol. Chem. 2013, 11,
900.
(14) (a) Ryu, D. H.; Corey, E. J. J. Am. Chem. Soc. 2005, 127, 5384.
(b) Gao, L.; Hwang, G.-S.; Lee, M. Y.; Ryu, D. H. Chem. Commun. 2009,
5460. (c) Gao, L.; Hwang, G.-S.; Ryu, D. H. J. Am. Chem. Soc. 2011, 133,
20708. (d) Lee, S. I.; Kim, K. E.; Hwang, G.-S.; Ryu, D. H. Org. Biomol.
Chem. 2015, 13, 2745.
This research was supported by the Basic Science Research
Program through the National Research Foundation of Korea
(NRF) funded by the Ministry of Education (NRF-
2013R1A1A2059838) and the Ministry of Science, ICT &
Future Planning (NRF-2013R1A1A2073207), by the National
Research Council of Science and Technology [the Creative
Allied Project (CAP)], and Korea Basic Science Institute
(C35705).
(15) For selected reviews on π−π interaction, see:. (a) Waters, M. L.
Curr. Opin. Chem. Biol. 2002, 6, 736. (b) Salonen, L. M.; Ellermann, M.;
Diederich, F. Angew. Chem., Int. Ed. 2011, 50, 4808.
(16) The rest of the configurational assignments have been assigned by
analogy.
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