1.1
Reagents:
Diisopropylethylamine
Solvents:
Dimethyl sulfoxide
;
18 h, 60 °C
1.2
Reagents:
Ammonium formate
,
Zinc
Solvents:
Ethanol
;
2 h, 60 °C
1.3
Solvents:
Ethanol
;
18 h

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