Ethyl Acetate → 5-Chloropyridine-2,3-diamine

Beteiligte Stoffe

Reaktionsschritte

A procedure similar to that described in Preparation 42 was repeated, except that 12.5 g of 2-amino-5-chloro-3-nitropyridine (prepared as described in Preparation 61) 82.0 g of tin(II) chloride dihydrate, 1.35 g of sodium borohydride and 300 ml of a 9:1 by volume mixture of ethyl acetate and 2-methyl-2-propanol were used, to give the title compound as a crude product. This crude product was crystallized by trituration with a mixture of ethyl acetate and hexane, to give 8.14 g of the title compound, melting at 164°-165° C.

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