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Chemical Structure| 13519-16-9 Chemical Structure| 13519-16-9

Structure of 13519-16-9

Chemical Structure| 13519-16-9

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Product Details of [ 13519-16-9 ]

CAS No. :13519-16-9
Formula : C8H8N2O
M.W : 148.16
SMILES Code : COC1=CC=C(NC#N)C=C1
MDL No. :MFCD09035203

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Application In Synthesis of [ 13519-16-9 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 13519-16-9 ]

[ 13519-16-9 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 2293-07-4 ]
  • [ 13519-16-9 ]
YieldReaction ConditionsOperation in experiment
95% With iron(III) sulphate monohydrate; sodium acetate; at 20℃; for 2h; General procedure: To a stirred solution of DMSO (4-5 mL), respectiveisothiocyanate (2 mmol) was added slowly at roomtemperature and stirring further continued for 3 h atroom temperature. The progress of the reaction wasinvestigated by TLC (20% ethylacetate in hexane).After forming the respective substituted thiourea (asper TLC) Fe2(SO4)3.H2O (50 mol %, 417 mg) andNaOAc (2 mmol, 164 mg) were added to that solutionat room temperature, then the reaction mixture wasstirred for 2 h. During this time black color precipitate(FeS) was observed. And it was removed by centrifugation. The clear solution was concentrated byusing a rotary evaporator and the crude mixture waspurified by silica gel (60-120 mesh) column chromatographyusing Ethylacetate in Hexane as eluent toobtain a phenyl cyanamide as a white solid.
With sodium hydrogencarbonate; tetrapropylammonium tribromide; In water; ethyl acetate; for 0.0833333h;Green chemistry; General procedure: To a stirred and ice cooled suspension of dithiocarbamate(Table 2, compound 1) (540 mg, 2 mmol) in ethylacetate (5 mL), was added NaHCO3 (336 mg, 4 mmol). To this was then added TPATB (0.852 g, 2 mmol) pinch wise over a period of 10-15 minutes to yield phenylisothiocyanate. During this period precipitation of elemental sulfur was observed. After complete addition of TPATB, 25% aqueous NH3 (2.5 mL) was added drop wise to the stirred reaction mixture to give 1-phenylthiourea. After stirring for 10 minutes at room temperature, the excess of NH3 was removed in a rotary evaporator whereby the solvent ethylacetate was also simultaneously removed leaving behind the aqueous layer. To the crude reaction mixture was then further added ethyl acetate (5 mL) and NaHCO3 (336 mg,4 mmol). To the resultant solution, TPATB (0.852 g, 2mmol) was added in small pinches, during which further precipitation of elemental sulfur was observed. The conversion of 1-phenylthiourea to phenylcyanamide (Table 2,compound 1b) was observed within 5 minutes of the complete addition of TPATB. Completion of the reaction was confirmed by TLC. The precipitated sulfur was filtered,washed with ethyl acetate (2 × 5 mL). The organic layer was washed with water (2 × 5 mL) and dried over anhydrous Na2SO4, concentrated under reduced pressure and purified over a short column of silica gel eluting it with hexane-ethyl acetate (97:3) to give the pure product (Table2, compound 1b) (188 mg, 80%) as an oily liquid.
287 mg With cobalt(II) sulfate monohydrate; sodium acetate; In N,N-dimethyl-formamide; at 20℃; for 2h; General procedure: Aryl/alkyl isothiocyanate 1a-h,l-n (2 mmol) was addedslowly to stirred DMF (4-5 ml), followed by addition ofaqueous NH3 (2 ml, 2 mmol) at room temperature. Thereaction mixture was stirred for 1 h at room temperature.Thiourea formation was monitored by TLC on silica gel.Then CoSO4·H2O (121 mg, 0.5 mmol, 25 mol %) wasadded slowly followed by addition of NaOAc (164 mg,2 mmol), and the reaction mixture was stirred for 2 h atroom temperature. During this time, black precipitate(CoS) appeared and was removed by centrifugation. Theclear solution was concentrated using rotary evaporator,and the crude mixture was purified by columnchromatography using 10% EtOAc in hexane as eluent toobtain a corresponding cyanamide as a target product.
 

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