4933-40-8|2-(1H-Benzo[d]imidazol-2(3H)-ylidene)malononitrile| Ambeed

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CAS No. :	4933-40-8
Formula :	C₁₀H₆N₄
M.W :	182.18
SMILES Code :	N#CC(C#N)=C1NC2=CC=CC=C2N1

Yield	Reaction Conditions	Operation in experiment
84%		General procedure: Equimolar amounts (3 mmol) of bis(methylthio)methylenemalononitrile (1) and bidentate amine namely: 2-aminopropan-1-ol, 1-aminopropan-2-ol or o-phenylenediamine in 40 cm3 ethanol were stirred with reflux for about 8 h, then3 mmol of cyanoguanidine (3) in freshly prepared sodiumethoxide solution (4 mmol of sodium in 20 cm3 absoluteethanol) was added and the reaction mixture was refluxedfor about 5 h. After completion of reaction (monitored withTLC), the reaction mixture was cooled to RT and poured inice-cold water and neutralized to pH *7.0 with dilutedHCl. The formed precipitate was collected by filtration,washed several times with distilled water, dried, andrecrystallized from dioxane.
77.6%	In ethanol; at 70℃; for 4h;	(Step 1) <strong>[5147-80-8][Bis(methylthio)methylene]malononitrile</strong> (6.00 g, 35.2 mmol) was dissolved in ethanol (50 mL) and a solution of phenylenediamine (3.80 g, 35.6 mmol) in ethanol (20 mL) was added dropwise, followed by stirring at 70C for 4 hours. The mixture was cooled and the precipitated white solid was collected by filtration to obtain (benzimidazolidin-2-ylidene)malononitrile (4.97 g, 77.6 %). 1H NMR (DMSO-d6, δppm): 7.19 (dd, J = 3.1, 6.1 Hz, 2H), 7.30 (dd, J = 3.1, 6.1 Hz, 2H), 12.82 (br s, 2H).

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Environmental hazards
Code	Phrase
H400	Very toxic to aquatic life
H401	Toxic to aquatic life
H402	Harmful to aquatic life
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H411	Toxic to aquatic life with long-lasting effects
H412	Harmful to aquatic life with long-lasting effects
H413	May cause long-lasting harmful effects to aquatic life
H420	Harms public health and the environment by destroying ozone in the upper atmosphere

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CAS No.: 4933-40-8

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CAS No.: 4933-40-8

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