1.1
Reagents:
4-(Dimethylamino)pyridine
,
(Diethylamino)sulfur trifluoride
Solvents:
Dichloromethane
;
-25 °C; 6 h, -25 °C; -25 °C → rt; overnight, rt; rt → 0 °C
1.2
Reagents:
Methanol