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[ CAS No. 64951-06-0 ]

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Chemical Structure| 64951-06-0
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CAS No. :64951-06-0 MDL No. :MFCD02186164
Formula : C9H9N3O2 Boiling Point : -
Linear Structure Formula :- InChI Key :-
M.W :191.19 g/mol Pubchem ID :2759351
Synonyms :

Safety of [ 64951-06-0 ]

Signal Word:Warning Class:N/A
Precautionary Statements:P261-P280-P305+P351+P338 UN#:N/A
Hazard Statements:H302-H315-H319-H332-H335 Packing Group:N/A
GHS Pictogram:

Application In Synthesis of [ 64951-06-0 ]

  • Upstream synthesis route of [ 64951-06-0 ]
  • Downstream synthetic route of [ 64951-06-0 ]

[ 64951-06-0 ] Synthesis Path-Upstream   1~6

  • 1
  • [ 109-12-6 ]
  • [ 70-23-5 ]
  • [ 64951-07-1 ]
  • [ 64951-06-0 ]
YieldReaction ConditionsOperation in experiment
30% at 75℃; for 16 h; 2-Aminopyrimidine (5 g, 52.6 mmol) and bromoethyl pyruvate (90percent, 7.35 mL, 52.6 mmol) were dissolved in ethanol (80 mL) and the reaction was heated to 75 °C for 16 h. The reaction was concentrated under reduced pressure and diluted with CH2Cl2 and sat aq NaHCO3. The organic layer was washed with sat aq NaHCO3 (2x) and the aq layers were extracted with CH2Cl2 (3x). The combined organic layers were dried over MgSO4 and concentrated under reduced pressure. The resulting brown oil was suspended in cold CH2Cl2 and filtered. The filter cake was washed with cold CH2Cl2 to obtain ethyl imidazo[1,2-a]pyrimidine-2-carboxylate (3 g, 30percent) as a light yellow oil. The mother liquor contains a mixture of ethyl imidazo[1,2-a]pyrimidine-2- carboxylate and ethyl imidazo[1,2-a]pyrimidine-3-carboxylate (6 g, 60percent) in the form of thick, black oil. This black oil was first purified by silica gel chromatography followed by recrystallization from EtOAc to obtain ethyl imidazo[1,2-a]pyrimidine-3- carboxylate (2 g, 20percent).[00236] For 2-isomer: 1H NMR (500 MHz, CDCl3) δ 8.69 (dd, J= 2.2, 6.6 Hz, 1H), 8.67 (dd, J= 2.2, 4.4 Hz, 1H), 8.22 (s, 1H), 7.01 (dd, J= 3.9, 6.6 Hz, 1H), 4.46 (q, J= 7.2 Hz, 2H), 1.43 (t, J= 7.2 Hz, 3H). [00237] 13C NMR (500 MHz, CDCl3) δ 162.8, 152.2, 147.8, 137.7, 134.4, 115.3, 110.0, 61.2, 14.2.[00238] HPLC-MS Phenomenex LUNA C-18 4.6 x 50 mm, 0 to 100percent B over 4 minutes, 1 minutes hold time, A = 90percent water, 10percent methanol, 0.1percent TFA, B = 10percent water, 90percent methanol, 0.1percent TFA, RT = 0.99 min, 95percent homogeneity index. [00239] LCMS: Anal. Calcd. for C9H9N3O2 191.07 found: 192.13 (M+H)+.[00240] For 3-isomer: HPLC Phenomenex LUNA C-18 4.6 x 50 mm, 0 to 100percent B over 4 minutes, 1 minutes hold time, A = 90percent water, 10percent methanol, 0.1percent TFA, B = 10percent water, 90percent methanol, 0.1percent TFA, RT = 1.39 min, 100percent homogeneity index. [00241] LCMS: Anal. Calcd. for C9H9N3O2 191.07 found: 192.19 (M+H)+.
Reference: [1] Patent: WO2006/71752, 2006, A1, . Location in patent: Page/Page column 83
[2] European Journal of Medicinal Chemistry, 1994, vol. 29, # 4, p. 279 - 286
[3] European Journal of Medicinal Chemistry, 1991, vol. 26, # 1, p. 13 - 18
[4] Journal of Medicinal Chemistry, 2010, vol. 53, # 15, p. 5620 - 5628
[5] Patent: WO2018/11628, 2018, A1, . Location in patent: Paragraph 00266
  • 2
  • [ 109-12-6 ]
  • [ 70-23-5 ]
  • [ 64951-07-1 ]
  • [ 64951-06-0 ]
YieldReaction ConditionsOperation in experiment
30% at 75℃; for 16 h; 2-Aminopyrimidine (5 g, 52.6 mmol) and bromoethyl pyruvate (90percent, 7.35 mL, 52.6 mmol) were dissolved in ethanol (80 mL) and the reaction was heated to 75 °C for 16 h. The reaction was concentrated under reduced pressure and diluted with CH2Cl2 and sat aq NaHCO3. The organic layer was washed with sat aq NaHCO3 (2x) and the aq layers were extracted with CH2Cl2 (3x). The combined organic layers were dried over MgSO4 and concentrated under reduced pressure. The resulting brown oil was suspended in cold CH2Cl2 and filtered. The filter cake was washed with cold CH2Cl2 to obtain ethyl imidazo[1,2-a]pyrimidine-2-carboxylate (3 g, 30percent) as a light yellow oil. The mother liquor contains a mixture of ethyl imidazo[1,2-a]pyrimidine-2- carboxylate and ethyl imidazo[1,2-a]pyrimidine-3-carboxylate (6 g, 60percent) in the form of thick, black oil. This black oil was first purified by silica gel chromatography followed by recrystallization from EtOAc to obtain ethyl imidazo[1,2-a]pyrimidine-3- carboxylate (2 g, 20percent).[00236] For 2-isomer: 1H NMR (500 MHz, CDCl3) δ 8.69 (dd, J= 2.2, 6.6 Hz, 1H), 8.67 (dd, J= 2.2, 4.4 Hz, 1H), 8.22 (s, 1H), 7.01 (dd, J= 3.9, 6.6 Hz, 1H), 4.46 (q, J= 7.2 Hz, 2H), 1.43 (t, J= 7.2 Hz, 3H). [00237] 13C NMR (500 MHz, CDCl3) δ 162.8, 152.2, 147.8, 137.7, 134.4, 115.3, 110.0, 61.2, 14.2.[00238] HPLC-MS Phenomenex LUNA C-18 4.6 x 50 mm, 0 to 100percent B over 4 minutes, 1 minutes hold time, A = 90percent water, 10percent methanol, 0.1percent TFA, B = 10percent water, 90percent methanol, 0.1percent TFA, RT = 0.99 min, 95percent homogeneity index. [00239] LCMS: Anal. Calcd. for C9H9N3O2 191.07 found: 192.13 (M+H)+.[00240] For 3-isomer: HPLC Phenomenex LUNA C-18 4.6 x 50 mm, 0 to 100percent B over 4 minutes, 1 minutes hold time, A = 90percent water, 10percent methanol, 0.1percent TFA, B = 10percent water, 90percent methanol, 0.1percent TFA, RT = 1.39 min, 100percent homogeneity index. [00241] LCMS: Anal. Calcd. for C9H9N3O2 191.07 found: 192.19 (M+H)+.
Reference: [1] Patent: WO2006/71752, 2006, A1, . Location in patent: Page/Page column 83
[2] European Journal of Medicinal Chemistry, 1994, vol. 29, # 4, p. 279 - 286
[3] European Journal of Medicinal Chemistry, 1991, vol. 26, # 1, p. 13 - 18
[4] Journal of Medicinal Chemistry, 2010, vol. 53, # 15, p. 5620 - 5628
[5] Patent: WO2018/11628, 2018, A1, . Location in patent: Paragraph 00266
  • 3
  • [ 109-12-6 ]
  • [ 70-23-5 ]
  • [ 64951-06-0 ]
Reference: [1] ACS Combinatorial Science, 2018, vol. 20, # 3, p. 164 - 171
[2] Chemical and Pharmaceutical Bulletin, 1992, vol. 40, # 5, p. 1170 - 1176
  • 4
  • [ 617-35-6 ]
  • [ 64951-06-0 ]
Reference: [1] Chemical and Pharmaceutical Bulletin, 1992, vol. 40, # 5, p. 1170 - 1176
  • 5
  • [ 64951-06-0 ]
  • [ 134044-63-6 ]
Reference: [1] RSC Advances, 2016, vol. 6, # 93, p. 90031 - 90034
[2] European Journal of Medicinal Chemistry, 1991, vol. 26, # 1, p. 13 - 18
  • 6
  • [ 64951-06-0 ]
  • [ 149520-94-5 ]
YieldReaction ConditionsOperation in experiment
100% With hydrazine In ethanol at 75℃; for 16 h; To a stirred solution of ethyl imidazo[l ,2-α]pyrimidine-2-carboxylate or ethyl imidazo[1,2-a]pyrimidine-3-carboxylate (1 g, 5.2 mmol) in ethanol (40 mL) was added hydrazine monohydrate (0.28 mL, 5.7 mmol). The reaction was heated to 75 °C for 16 h and was concentrated under reduced pressure. The resulting light yellow solid was suspended in diethyl ether and filtered to collect ethyl 2-amino-1H-imidazole-4- carboxylate (800 mg, 100percent) as a white solid. [00243] 1E NMR (400 MHz, CD3OD) 5 7.27 (s, 1H), 4.24 (q, J= 7.0 Hz, 2H), 1.31(t, J= 7.0 Hz, 3H).[00244] 13C NMR (500 MHz, CD3OD) δ 165.5, 156.1, 131.8, 125.7, 63.8, 17.3.[00245] HPLC Phenomenex LUNA C- 18 4.6 x 50 mm, 0 to 100percent B over 4 minutes, 1 minutes hold time, A = 90percent water, 10percent methanol, 0.1percent TFA, B = 10percent water, 90percent methanol, 0.1percent TFA, RT = 0.46 min, 100percent homogeneity index.[00246] Anal. Calcd for C6H9N3O2: C, 46.44; H, 5.84; N5 27.08. Found: C, 46.17;H, 5.65; N, 27.28.[00247] HRMS: Anal. Calcd. for C6Hi0N3O2 156.0773 found: 156.0779 (M+H)+.
Reference: [1] Patent: WO2006/71752, 2006, A1, . Location in patent: Page/Page column 84
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