Scheme 2.
Ortho-lithiation syntheses: a) NaH, MOMCl, DMF, 93%; b) 1) n-BuLi, geranyl bromide, THF 2) n-BuLi, DMF, 48%; c) n-BuLi, bromooctane, THF, 0 °C, 95%; d) ethylene glycol, mw 160 °C, 98%; e) POCl3, DMF, 96%; f) SO2Cl2, CH2Cl2, quant.
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