1671-76-7 Usage
Preparation
Different sources of media describe the Preparation of 1671-76-7 differently. You can refer to the following data:
1. To a solution of N-methoxy-N-methyl-2-pyridyl urethane (364.4 mg, 2 mmol) in THF (6 mL), p-methoxyphenylmagnesium bromide (0.25 m in THF, 8 mL, 2 mmol) was added dropwise over a period of 10 min at 0 °C under nitrogen atmosphere. Stirring was maintained for a further 5 min and then n-butyllithium (1.60 m in hexane, 1.5 mL, 2.4 mmol) was added directly to the mixture (one-pot process). The reaction mixture was stirred for 0.5 h, while warming to room temperature, and was then quenched with 1 n HCl (5 mL). After evaporation of the THF, the concentrated mixture was poured into 1 n HCl (30 mL) and the aqueous phase was extracted with dichloromethane (3*20 mL). The combined organic extracts were dried over MgSO4, filtered, and concentrated to dryness in vacuo. The crude product was purified by column chromatography on silica gel (EtOAc/n-hexane, 1:4) to give 369.1 mg (96%) of p-methoxyvalerophenone.
2. To a solution of N-methoxy-Nmethyl- 2-pyridyl urethane (364.4 mg, 2 mmol) in THF (6 mL), p-methoxyphenylmagnesium bromide (0.25 m in THF, 8 mL, 2 mmol) was added dropwise over a period of 10 min at 0 ℃ under nitrogen atmosphere. Stirring was maintained for a further 5 min and then n-butyllithium (1.60 M in hexane, 1.5 mL, 2.4 mmol) was added directly to the mixture (one-pot process). The reaction mixture was stirred for 0.5 h, while warming to room temperature, and was then quenched with 1 N HCl (5 mL). After evaporation of the THF, the concentrated mixture was poured into 1 N HCl (30 mL) and the aqueous phase was extracted with dichloromethane (3×20 mL). The combined organic extracts were dried over MgSO4, filtered, and concentrated to dryness in vacuo. The crude product was purified by column chromatography on silica gel (EtOAc/n-hexane, 1:4) to give 369.1 mg (96%) of p-methoxyvalerophenone.
Synthesis Reference(s)
Chemistry Letters, 15, p. 165, 1986Tetrahedron, 50, p. 11839, 1994 DOI: 10.1016/S0040-4020(01)89299-1
Check Digit Verification of cas no
The CAS Registry Mumber 1671-76-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,7 and 1 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1671-76:
(6*1)+(5*6)+(4*7)+(3*1)+(2*7)+(1*6)=87
87 % 10 = 7
So 1671-76-7 is a valid CAS Registry Number.
InChI:InChI=1/C12H16O2/c1-3-4-5-12(13)10-6-8-11(14-2)9-7-10/h6-9H,3-5H2,1-2H3
1671-76-7Relevant articles and documents
Aminophenone compounds as well as preparation method and application thereof
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Paragraph 0047; 0051-0053; 0229-0230; 0234-0236, (2021/02/06)
The invention belongs to the technical field of medicinal chemistry, and particularly relates to aminophenone compounds as well as a preparation method and application thereof. The aminophenone compounds provided by the invention have a good inhibition effect on PDE4, also have good bioavailability, can be applied to preparation of drugs for treating PDE4-related diseases, and increase the optionsof drugs for treating PDE4-related diseases; and the effect of a part of the aminophenone compounds is equivalent to the effect of positive drugs, and the aminophenone compounds have good developmentpotential.
Continuous Flow Acylation of (Hetero)aryllithiums with Polyfunctional N,N-Dimethylamides and Tetramethylurea in Toluene
Djukanovic, Dimitrije,Filipponi, Paolo,Heinz, Benjamin,Knochel, Paul,Mandrelli, Francesca,Martin, Benjamin,Mostarda, Serena
supporting information, p. 13977 - 13981 (2021/09/13)
The continuous flow reaction of various aryl or heteroaryl bromides in toluene in the presence of THF (1.0 equiv) with sec-BuLi (1.1 equiv) provided at 25 °C within 40 sec the corresponding aryllithiums which were acylated with various functionalized N,N-
Development of Trifluoromethanesulfonic Acid-Immobilized Nitrogen-Doped Carbon-Incarcerated Niobia Nanoparticle Catalysts for Friedel-Crafts Acylation
Yang, Xi,Yasukawa, Tomohiro,Yamashita, Yasuhiro,Kobayashi, Shū
, p. 15800 - 15806 (2021/10/25)
Heterogeneous trifluoromethanesulfonic acid-immobilized nitrogen-doped carbon-incarcerated niobia nanoparticle catalysts (NCI-Nb-TfOH) that show excellent catalytic performance with low niobium loading (1 mol %) in Friedel-Crafts acylation have been developed. These catalysts exhibit higher activity and higher tolerance to catalytic poisons compared with the previously reported TfOH-treated NCI-Ti catalysts, leading to a broader substrate scope. The catalysts were characterized via spectroscopic and microscopic studies.