1.1
Reagents:
Sodium bicarbonate
Solvents:
Toluene
;
rt; 10 h, rt
1.2
Reagents:
Tributyltin chloride
,
Sodium azide
Solvents:
Xylene
;
rt → reflux; 24 - 30 h, reflux
1.3
Reagents:
Potassium hydroxide
Solvents:
Water
;
7 h, 30 - 40 °C