1.1
Reagents:
Boron trichloride
Solvents:
Dichloromethane
;
rt → -40 °C; 1 h, -40 - -30 °C; 1 h, -30 °C
1.2
Reagents:
Triethylamine
Solvents:
Methanol
;
-20 °C; -20 °C → rt
1.3
Solvents:
Heptane
;
30 min, 40 - 50 °C
1.4
Reagents:
Sodium hydroxide
Solvents:
Water
;
pH 11

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