1.1
Reagents:
Dicyclohexylcarbodiimide
Catalysts:
4-(Dimethylamino)pyridine
Solvents:
Dichloromethane
;
30 min, rt
1.2
Reagents:
1,8-Diazabicyclo[5.4.0]undec-7-ene
Solvents:
Dichloromethane
;
rt; 30 min, rt
1.3
Reagents:
Trifluoroacetic acid
Solvents:
Water
;
30 min, rt