1.1
Reagents:
Diisopropylethylamine
,
O-(7-Azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate
Solvents:
Dimethylformamide
;
rt
1.2
3 h, rt
1.3
Reagents:
Piperidine
Solvents:
Dimethylformamide
;
2 h, rt
1.4
Reagents:
O-(7-Azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate
Solvents:
Dimethylformamide
,
Diisopropylethylamine
;
3 h, rt
1.5
Reagents:
Trifluoroacetic acid
Solvents:
Dichloromethane
;
5 min, rt