1.1
Reagents:
Butyllithium
,
N,N,N′,N′-Tetramethylethylenediamine
Solvents:
Tetrahydrofuran
,
Hexane
;
-78 °C; 2 h, -78 °C
1.2
1 h, -78 °C; overnight, rt
1.3
Reagents:
Sulfuric acid
Solvents:
Water
;
3 h, rt

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