Figure 1.
Reagents and conditions: (a) Ac2O, pyridine, reflux, 6 h, 85%. (b) PhSH, imidazole, NMP, 0°C, 1 h, 80%. (c1) NO2-PhCH2Cl, Na2CO3, acetone, 3 h. (c2) CH3-PhCH2Cl, Na2CO3, acetone, 3 h. (d) 2M NH3/acetone, 0°C, 5 min (40%)
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