Home Cart Sign in  
Chemical Structure| 118197-42-5 Chemical Structure| 118197-42-5

Structure of 118197-42-5

Chemical Structure| 118197-42-5

*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 [ 118197-42-5 ]

CAS No. :118197-42-5
Formula : C7H9ClN2O2
M.W : 188.61
SMILES Code : O=C(C1=CN(C)N=C1Cl)OCC
MDL No. :MFCD28039496

Safety of [ 118197-42-5 ]

Application In Synthesis of [ 118197-42-5 ]

* 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 [ 118197-42-5 ]

[ 118197-42-5 ] Synthesis Path-Downstream   1~2

  • 1
  • [ 21230-43-3 ]
  • [ 7758-99-8 ]
  • [ 118197-42-5 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride; sodium chloride; sodium nitrite; In water; A. Preparation of Ethyl 3-Chloro-1-methylpyrazole-4-carboxylate A solution of 41.4 g (267 mmol) of <strong>[21230-43-3]ethyl 3-amino-1-methylpyrazole-4-carboxylate</strong> in a mixture of 150 mL of concentrated hydrochloric acid, 50 mL of 85 percent phosphoric acid, and 100 mL of water was prepared and cooled to about 0 C. A solution of 18.6 g (270 mmol) of sodium nitrite in 50 mL of water was added to this dropwise with cooling and stirring. After a short time the reaction mixture was added dropwise with stirring at ambient temperature to a solution of 46.5 g (484 mmol) of cupric sulfate and 60.0 g (1.03 mol) of sodium chloride in 200 mL of water. When the addition was complete, the mixture was heated to 50 C. with stirring for 1 hr. A solid formed. The mixture was extracted with methylene chloride and the extract was washed with water, dried over magnesium sulfate, and concentrated by evaporation under reduced pressure to obtain an impure solid. This was dried and recrystallized from ethanol to obtain 24.8 g of the title compound as a white solid melting at 76-77 C. Elemental Analysis: Calc. for C7 H9 ClN2 O2: %C, 44.6; %H, 4.81: %N, 14.9 Found: %C, 45.6: %H, 5.11; %N, 15.4 1 H NMR Spectrum: (delta ppm from TMS) 7.8 (s, 1H), 4.26 (q, 2H, J=7.2), 3.83 (s, 3H), and 1.31 (t, 3H, J=7.2).
  • 2
  • copper(ll) sulfate pentahydrate [ No CAS ]
  • [ 21230-43-3 ]
  • [ 118197-42-5 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride; sodium chloride; phosphoric acid; sodium nitrite; In water; (1) Synthesis of ethyl 3-chloro-1-methylpyrazole-4-carboxylate: Into a solution of 150 ml of conc. HCl, 50 ml of phosphoric acid (85%), 41.4 g of <strong>[21230-43-3]ethyl 3-amino-1-methylpyrazole-4-carboxylate</strong> and 100 ml of water, there was added dropwise a 50 ml of aqueous solution of 18.6 g of sodium nitrite at 0 C. or lower. The reaction mixture was added dropwise into a solution of 90 g of cupric sulfate (pentahydrate) and 60 g of sodium chloride dissolved in 200 ml of water at room temperature. The mixture was heated for an hour at 50 C. and after cooling, followed by extraction with chloroform. After washing with water and drying, evaporation of the solvent gave 44.8 g of ethyl 3-chloro-1-methylpyrazole-4-carboxylate. m.p.: 65-66 C.
 

Historical Records

Technical Information

Categories