Home Cart Sign in  
Chemical Structure| 1211580-90-3 Chemical Structure| 1211580-90-3

Structure of 1211580-90-3

Chemical Structure| 1211580-90-3

*Storage: {[sel_prStorage]}

*Shipping: {[sel_prShipping]}

,{[proInfo.pro_purity]}

4.5 *For Research Use Only !

{[proInfo.pro_purity]}
Cat. No.: {[proInfo.prAm]} Purity: {[proInfo.pro_purity]}

Change View

Size Price VIP Price

US Stock

Global Stock

In Stock
{[ item.pr_size ]} Inquiry {[ getRatePrice(item.pr_usd,item.pr_rate,item.mem_rate,item.pr_is_large_size_no_price, item.vip_usd) ]}

US Stock: ship in 0-1 business day
Global Stock: ship in 5-7 days

  • {[ item.pr_size ]}

In Stock

- +

Please Login or Create an Account to: See VIP prices and availability

US Stock: ship in 0-1 business day
Global Stock: ship in 2 weeks

  • 1-2 Day Shipping
  • High Quality
  • Technical Support
Product Citations

Alternative Products

Product Details of [ 1211580-90-3 ]

CAS No. :1211580-90-3
Formula : C9H12N2O2
M.W : 180.20
SMILES Code : O=C(N(OC)C)C1=CC=NC(C)=C1
MDL No. :MFCD18261713

Safety of [ 1211580-90-3 ]

Application In Synthesis of [ 1211580-90-3 ]

* 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.

  • Upstream synthesis route of [ 1211580-90-3 ]

[ 1211580-90-3 ] Synthesis Path-Upstream   1~1

  • 1
  • [ 1211580-90-3 ]
  • [ 917-54-4 ]
  • [ 2732-28-7 ]
YieldReaction ConditionsOperation in experiment
56.4% at -78 - 20℃; for 1 h; Inert atmosphere To a stirred solution of N-methoxy-N,2-dimethylisonicotinamide (266c) (26 g,144.28Immol) in THF (520 rnL) was added MeLi (6.342 g, 288.562 mmoi, 1 M solution inTHF) under nitrogen atmosphere at -78°C. The reaction mixture was warmed to room temperature over a period of 1 h, quenched with saturated NH4CI solution at 0°C. The resulting reaction mixture was extracted with ethyl acetate and the organic layer was washed with water and brine, dried over sodium sulfate, filtered and concentrated. Theresidue obtained was purified by column chromatography to afford I -(2-methylpyridin-4-yl)ethanone (266d) (11 g, 56.4percent yield) as a reddish thick liquid; ‘H NMR (CDCI3) 3 8.6 1-8.59 (d, 1H), 7.51-7.45 (d, IH), 7.45-7.44 (m, lH), 2.56(s, 3H), 2.53 (s, 3H); MS (ES+)136. l(M+I).
56.4% at -78 - 20℃; for 1 h; Inert atmosphere Step-3 : Preparation of l-(2-methylpyridin-4-yl)ethanone (46d) To a stirred solution of N-methoxy-N,2-dimethylisonicotinamide (46c) (26 g, 144.28 lmmol) in THF (520 mL) was added MeLi (6.342 g, 288.562 mmol, 1 M solution in THF) under nitrogen atmosphere at -78°C. The reaction mixture was warmed to room temperature over a period of 1 h, quenched with saturated H4C1 solution at 0°C. The resulting reaction mixture was extracted with ethyl acetate and the organic layer was washed with water and brine, dried over sodium sulfate, filtered and concentrated. The residue obtained was purified by column chromatography to afford l-(2-methylpyridin-4-yl)ethanone (46d) (11 g, 56.4percent yield) as a reddish thick liquid; 1H MR (CDC13) δ 8.61-8.59 (d, 1H), 7.51-7.45 (d, 1H), 7.45-7.44 (m, 1H), 4.05-4.02 (s, 3H); MS (ES+) 136.1(M+1).
51%
Stage #1: at -78 - 20℃; for 1.5 h; Inert atmosphere
Stage #2: With ammonium chloride In tetrahydrofuran
Methyl lithium (3M, 1.7 mL, 3.48mmol) was added to a solution of N-methoxy-N2- dimethylisonicotinamide (314 mg, 1.74mmol) in dry THF (4 mL) at -78 °C under nitrogen protection. The mixture was stirred at -78 °C and slowly warm up to rt for 1.5h. After completion, 10 mL of NH4C1 solution (saturated) was added to the mixture, and it was extracted with EtOAc (10 mLx3). The combined organic layers were washed with brine (20 mL), dried over Na2S04, and filtered. The filtrate was concentrated, and the residue was purified by silica gel column chromatography (CH2Cl2/MeOH=50/l) to obtain title compound (120mg, yield: 51percent). LCMS-AOIO: 136.1 [M+H]+; Rt = 0.585 min
51% at -78 - 20℃; for 1.5 h; Inert atmosphere (b) I -(2-methyipyridin-4-yl)ethanone: Methyl lithium (3M, 1.7 mL, 3.48inniol) was added to a solution of W-methoxy-X, 2-dimethyiisonieotinamide (314 ing, I .74mmol) in dry THE (4 mL) at -78 °C under nitrogen protection. The mixture was stirred at -78 °C and slowly warm up to it for l.5h. After completion, 10 niL of NI-LCI solution (saturated) was added to the mixture, and it was extracted with EtOAc (10 mLx3). The combined organic layers were washed with brine (20mL), dried over Na2SO4, and filtered. The filtrate was eoneeitmated, and the residue was purified by silica gel column chromatography (CH2C12/MeOH=50/i) to obtain title compound (120mg, yield: 51percent). LCMS-A0i0: 136.1 [M+H] R = 0.585 mm

References: [1] Patent: WO2015/134998, 2015, A1, . Location in patent: Page/Page column 840; 841.
[2] Patent: WO2017/59178, 2017, A1, . Location in patent: Page/Page column 151.
[3] Patent: WO2013/19682, 2013, A1, . Location in patent: Page/Page column 141; 142.
[4] Patent: WO2013/19626, 2013, A1, . Location in patent: Page/Page column 34; 35.
 

Historical Records

Technical Information

Categories