.
Scheme 1.
Synthetic route of compound 1 as reported in the original literature, along with its potential by-products Reagents and conditions: (a) KHMDS, PhN(SO2CF3)2, THF, -50 °C to r.t., 96%; (b) (4-hydroxyphenyl) boronic acid, PdCl2(dppf), Cs2CO3, dioxane, H2O, r.t., 70%; (c) pyridinium tribromide, THF, r.t., 79%; (d) (4-methoxyphenyl)boronic acid, PdCl2(dppf), Cs2CO3, dioxane, H2O, 70 °C, 55%; (e) tert-butyl (R)-3-hydroxypyrrolidine-1-carboxylate, (E)-N1,N1,N2,N2-tetramethyldiazene-1,2-dicarboxamide, PPh3, THF, rt, 75%; (f) 4 mol/L HCl, dioxane, MeOH, r.t., 93%; (g) BF3?Me2S, DCM, r.t., 71%; (h) Iodoalkyl, K2CO3, DMF, 70 °C, 40%.
.
Scheme 1.
Synthetic route of compound 1 as reported in the original literature, along with its potential by-products Reagents and conditions: (a) KHMDS, PhN(SO2CF3)2, THF, -50 °C to r.t., 96%; (b) (4-hydroxyphenyl) boronic acid, PdCl2(dppf), Cs2CO3, dioxane, H2O, r.t., 70%; (c) pyridinium tribromide, THF, r.t., 79%; (d) (4-methoxyphenyl)boronic acid, PdCl2(dppf), Cs2CO3, dioxane, H2O, 70 °C, 55%; (e) tert-butyl (R)-3-hydroxypyrrolidine-1-carboxylate, (E)-N1,N1,N2,N2-tetramethyldiazene-1,2-dicarboxamide, PPh3, THF, rt, 75%; (f) 4 mol/L HCl, dioxane, MeOH, r.t., 93%; (g) BF3?Me2S, DCM, r.t., 71%; (h) Iodoalkyl, K2CO3, DMF, 70 °C, 40%.