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Reagents and Conditions: (a) N-methyl morpholine, Pd[P(Ph)3]4, acetic acid, 3 h; (b) HCTU, N,N-diisopropylethylamine, DMF, 2 h; (c) TFA, triethylsilane, water, 1,2-ethanedithiol, and thioanisole (93:1:2.5:2.5:1), 1 h.
