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3-aMino-2-cyanobut-2-enethioaMide synthesis

2synthesis methods
89943-20-4 Synthesis
2-cyano-3-ethoxybut-2-enethioaMide

89943-20-4
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3-aMino-2-cyanobut-2-enethioaMide

41808-30-4
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Yield:41808-30-4 80%

Reaction Conditions:

with ammonia in methanol at 20;

Steps:

V-A

A stirred solution of V-2 (30 g, 210 mmol) in a saturated solution of ammonia in methanol (500 mL) was stirred at rt overnight. MeOH was removed under reduced pressure, the aqueous layer was stood overnight, and the precipitate was collected to provide compound V-3 (24 g, yield 80%).

References:

WO2013/25733,2013,A1 Location in patent:Paragraph 0435