Bifunctional Organocatalyst for Activation of Carbon Dioxide and Epoxide To Produce Cyclic Carbonate: Betaine as a New Catalytic Motif
Yoshihiro Tsutsumi, Kyohei Yamakawa, Masahiko Yoshida, Tadashi Ema, and Takashi Sakai
Org. Lett., 2010, 12 (24), pp 5728–5731
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http://dx.doi.org/10.1021/ol102539x