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[ CAS No. 55864-87-4 ]

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2D
Chemical Structure| 55864-87-4
Chemical Structure| 55864-87-4
Structure of 55864-87-4 *Storage: {[proInfo.prStorage]}

Quality Control of [ 55864-87-4 ]

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Product Details of [ 55864-87-4 ]

CAS No. :55864-87-4MDL No. :MFCD00195040
Formula :C6H7N3O4Boiling Point :365°C at 760 mmHg
Linear Structure Formula :-InChI Key :-
M.W :185.14Pubchem ID :338416
Synonyms :

Computed Properties of [ 55864-87-4 ]

TPSA : - H-Bond Acceptor Count : -
XLogP3 : - H-Bond Donor Count : -
SP3 : - Rotatable Bond Count : -

Safety of [ 55864-87-4 ]

Signal Word:WarningClassN/A
Precautionary Statements:P261-P305+P351+P338UN#:N/A
Hazard Statements:H302-H315-H319-H335Packing Group:N/A
GHS Pictogram:

Application In Synthesis of [ 55864-87-4 ]

  • Upstream synthesis route of [ 55864-87-4 ]
  • Downstream synthetic route of [ 55864-87-4 ]

[ 55864-87-4 ] Synthesis Path-Upstream   1~3

  • 1
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YieldReaction ConditionsOperation in experiment
98% Reflux A solution of 4-nitro-1H-pyrazole-3-carboxylic acid (2.5 g, 15.9 mmol) in ethanolic HCl (38.3 mL, 1.25M) was refluxed overnight. All volatiles were removed to yield a whitesolid (2.9 g, 98percent) which was used without any further purification. MS: M=186.1 (M+H)+
98% Reflux; Inert atmosphere A solution of 4-nitro-lH-pyrazole-3-carboxylic acid (2.5 g, 15.9 mmol) in ethanolic HQ (38.3 mL, 1.25M) was refluxed overnight. All volatiles were removed to yield a white solid (2.9 g, 98 percent) which was used without any further purification.MS: M = 186.1 (M+H)+
96% at 20℃; for 48.00 h; Thionyl chloride (2.90 ml, 39.8 mmol) was slowly added to a mixture of 4-nitro-3- pyrazolecarboxylic acid (5.68 g, 36.2 mmol) in EtOH (100 ml) at ambient temperature and the mixture stirred for 48 h. The mixture was reduced in vacuo and EPO <DP n="124"/>dried through azeotrope with toluene to afford 4-nitro-lH-pyrazole-3-carboxylic acid ethyl ester as a white solid (6.42 g, 96percent). (1H NMR (400 MHz, DMSOd6) δ 14.4 (s, IH), 9.0 (S5 IH)3 4.4 (q, 2H), 1.3 (t, 3H)).
96% at 20℃; for 48.00 h; 1A. 4-Nitro-lH-pyrazole-3-carboxylic acid ethyl ester; OEtN-NHThionyl chloride (2.90 ml, 39.8 mmol) was slowly added to a mixture of 4-nitro-3-pyrazolecarboxylic acid (5.68 g, 36.2 mmol) in EtOH (100 ml) at ambienttemperature and the mixture stirred for 48 h. The mixture was reduced in vacuaand dried through azeotrope with toluene to afford 4-nitro-lH-pyrazole-3-carboxylic acid ethyl ester as a white solid (6.42 g, 96percent). (*H NMR (400 MHz,DMSO-d6) 8 14.4 (s, 1H), 9.0 (s, 1H), 4.4 (q, 2H), 1.3 (t, 3H)).
96% at 20℃; for 48.00 h; Preparation VIII; Synthesis of 4-ammo-1H-pyrazole-3-carboxylic acid ethyl esterStep 1. 4-Nitro-1H-pyrazole-3-carboxylic acid ethyl esterThionyl chloride (2.90 ml, 39.8 mmol) was slowly added to a mixture of 4-nitro-3- pyrazolecarboxylic acid (5.68 g, 36.2 mmol) in EtOH (100 ml) at ambient temperature and the mixture stirred for 48 hours. The mixture was reduced in vacuo and dried through azeotrope with toluene to afford 4-nitro-1H-pyrazole-3- carboxylic acid ethyl ester as a white solid (6.42 g, 96percent). (1H NMR (400 MHz, DMSO-d6) δ 14.4 (s, IH), 9.0 (s, IH), 4.4 (q, 2H), 1.3 (t, 3H)).
96% at 20℃; for 48.00 h; Thionyl chloride (2.90 ml, 39.8 mmol) was slowly added to a mixture of 4-nitro-3-pyrazolecarboxylic acid (5.68 g, 36.2 mmol) in EtOH (100 ml) at ambient temperature and the mixture stirred for 48 h. The mixture was reduced in vacuo and dried through azeotrope with toluene to afford 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester as a white solid (6.42 g, 96percent). (1H NMR (400 MHz, DMSO-d6) D 14.4 (s, 1 H), 9.0 (s, 1 H), 4.4 (q, 2H), 1.3 (t, 3H)).
96% at 20℃; for 48.00 h; Thionyl chloride (2.90 ml, 39.8 mmol) was slowly added to a mixture of 4-nitro-3-pyrazolecarboxylic acid (5.68 g, 36.2 mmol) in EtOH (100 ml) at ambient temperature and the mixture stirred for 48 h. The mixture was reduced in vacuo and dried through azeotrope with toluene to afford 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester as a white solid (6.42 g, 96percent). (1H NMR (400 MHz, DMSO-d6) D 14.4 (s, 1 H), 9.0 (s, 1 H), 4.4 (q, 2H), 1.3 (t, 3H)).
96% at 20℃; for 48.00 h; Step 1. 4-Nitro-lH-pyrazole-3-carboxylic acid ethyl ester; Thionyl chloride (2.90 ml, 39.8 mmol) was slowly added to a mixture of 4-nitro-3- pyrazolecarboxylic acid (5.68 g, 36.2 mmol) in EtOH (100 ml) at ambient temperature and the mixture stirred for 48 hours. The mixture was reduced in vacuo and dried through azeotrope with toluene to afford 4-nitro-lH-pyrazole-3- carboxylic acid ethyl ester as a white solid (6.42 g, 96percent). (1H NMR (400 MHz, DMSO-d6) δ 14.4 (s, IH), 9.0 (s, IH), 4.4 (q, 2H), 1.3 (t, 3H)).

Reference: [1] Patent: US2011/306589, 2011, A1. Location in patent: Page/Page column 45
[2] Patent: WO2011/154327, 2011, A1. Location in patent: Page/Page column 118
[3] Patent: WO2006/70198, 2006, A1. Location in patent: Page/Page column 122-123
[4] Patent: WO2006/3440, 2006, A1. Location in patent: Page/Page column 147
[5] Patent: WO2006/77414, 2006, A1. Location in patent: Page/Page column 142
[6] Patent: WO2006/77424, 2006, A1. Location in patent: Page/Page column 186
[7] Patent: WO2006/77425, 2006, A1. Location in patent: Page/Page column 186
[8] Patent: WO2006/77428, 2006, A1. Location in patent: Page/Page column 163
[9] Patent: WO2008/7123, 2008, A2. Location in patent: Page/Page column 111
[10] Journal of Medicinal Chemistry, 2008, vol. 51, # 16, p. 4986 - 4999
[11] Patent: WO2005/37797, 2005, A1. Location in patent: Page/Page column 271-272
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YieldReaction ConditionsOperation in experiment
96% With thionyl chloride In ethanol at 20℃; for 48.00 h; Thionyl chloride (2.90 ml, 39.8 mmol) was slowly added to a mixture of 4-nitro-3- pyrazolecarboxylic acid (5.68 g, 36.2 mmol) in EtOH (100 ml) at ambient temperature and the mixture stirred for 48 h.
The mixture was reduced in vacuo and dried through azeotrope with toluene to afford 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester as a white solid (6.42 g, 96percent). (1H NMR (400 MHz, DMSO-d6) δ 14.4 (s, 1H), 9.0 (s, 1H), 4.4 (q, 2H), 1.3 (t, 3H)).
Reference: [1] Patent: WO2005/12256, 2005, A1. Location in patent: Page/Page column 184
[2] Patent: WO2007/23105, 2007, A1. Location in patent: Page/Page column 63-64
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Reference: [1] Patent: US2005/197340, 2005, A1. Location in patent: Page/Page column 68
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