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. Author manuscript; available in PMC: 2013 May 2.
Published in final edited form as: J Am Chem Soc. 2012 Apr 17;134(17):7329–7332. doi: 10.1021/ja3027136

Scheme 2.

Scheme 2

Synthetic Utility of Lactone Products

Conditions: (a) allyl bromide (2 equiv), DBU (2 equiv), THF, rt, 2h, 94%. (b) LiCl, DMSO, 140 °C, 87%. (c) i) K2CO3, dibromomethane, 84%. ii) LiCl, DMSO, 140 °C, 87%.