1.1
Reagents:
Tributylstannane
Catalysts:
Azobisisobutyronitrile
Solvents:
Toluene
;
rt; rt → reflux; 6 h, reflux
1.2
Reagents:
Trifluoroacetic acid
Solvents:
Tetrahydrofuran
;
10 °C; 5 h, rt
1.3
Reagents:
Sodium hydroxide
Solvents:
Water
;
0 °C