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. Author manuscript; available in PMC: 2016 Feb 6.
Published in final edited form as: Org Lett. 2015 Jan 23;17(3):636–639. doi: 10.1021/ol503655a

Figure 1.

Figure 1

Substrate scope. Conditions: 1 (0.5 mmol), 2 (0.63 mmol), DEU (0.1 mmol), DMSO (1 mL), rt (≈22 °C), 4 h, isolated yields. a80 °C, 2 d. bNeat DMPU, 80 °C, 2 d. c60 °C, 4 h.