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Reagents and conditions: a) i) ethyl chloroformate, Et3N, THF; ii) TMSCH2N2, ACN, 24 hr., +4 °C (54%); b) silver benzoate, Et3N, anhydrous methanol (55%); c) LiBH4, THF, ethanol (78%); d) phthalimide, DIAD, PPh3, THF (53%); e) hydrazine, methanol (90%); f) 2-phenethyl-4-phenylbutanoic acid, EDC, HOBT, 2,6-lutidine, DMF(75%); g) 20% Pd(OH)2/C, H2, ethanol (100%).
