DOI:
10.1055/s-00000083
Synlett
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For a method for E-selective Wittig olefinations [(3-hydroxypropyl)triphenylphosphoniumchloride (ref. 23b), n-BuLi (2.0 equiv), THF, –20 °C, 2 h; 4-methoxybenzalde-hyde (1.2 equiv), –20 °C → r.t., 4 h; 72% of pure E-isomer after recrystallization from cyclohexane], see: Maryanoff B, Reitz A, Duhl-Emswiler B.
J. Am. Chem. Soc. 1985;
107: 217
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