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. Author manuscript; available in PMC: 2019 Apr 29.
Published in final edited form as: J Org Chem. 2016 Oct 13;81(20):9560–9566. doi: 10.1021/acs.joc.6b00922

Scheme 2. Synthesis of the Side Chainsa.

Scheme 2.

aReagents and conditions: (a) SOCl2, BnOH, > 99%; (b) TESOTf (2 equiv), 0 to rt, 51%; (c) δ-lactone, THF, 75 °C, 94%; (d) TESOTf (2 equiv), 0 °C to rt, 79%.