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1244024-26-7

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1244024-26-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1244024-26-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,4,0,2 and 4 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1244024-26:
(9*1)+(8*2)+(7*4)+(6*4)+(5*0)+(4*2)+(3*4)+(2*2)+(1*6)=107
107 % 10 = 7
So 1244024-26-7 is a valid CAS Registry Number.

1244024-26-7Relevant articles and documents

Transition-Metal-Free Synthesis of Pyrrolo[1,2- a ]pyrazines via Intramolecular Cyclization of N -Propargyl(pyrrolyl)enaminones

Sobenina, Lyubov N.,Sagitova, Elena F.,Ushakov, Igor A.,Trofimov, Boris A.

, p. 4065 - 4081 (2017)

A concise transition-metal-free strategy for the synthesis of pyrrolo[1,2- a ]pyrazines with enone substituents has been developed. It includes the following key steps: (a) cross-coupling of pyrroles with acyl(bromo)acetylenes in solid alumina at room temperature to give 2-(acylethynyl)pyrroles; (b) addition of propargylamine to the above acetylenes to form the corresponding N -propargylenaminones; and (c) chemo- and stereoselective base-catalyzed (Cs 2 CO 3 /DMSO) intramolecular cyclization of the synthesized propargylic derivatives to form (acylmethylidene)pyrrolo[1,2- a ]pyrazines of Z -configuration.

Pyrrole–aminopyrimidine ensembles: Cycloaddition of guanidine to acylethynylpyrroles

Budaev, Arsalan B.,Ivanov, Andrey V.,Petrova, Olga V.,Sagitova, Elena F.,Sobenina, Lyubov N.,Trofimov, Boris A.,Ushakov, Igor A.

, (2021/06/16)

An efficient method for the synthesis of pharmaceutically prospective pyrrole–aminopyrimidine ensembles (in up to 91% yield) by the cyclocondensation of easily available acylethynylpyrroles with guanidine nitrate has been developed. The reaction proceeds

Peculiarities of the cascade cleavage of the polarized C - C-fragment in α-ketoacetylenes on reaction with ethylene diamine

Vasilevsky, Sergei F.,Davydova, Maria P.,Tomilin, Denis N.,Sobenina, Lyubov N.,Mamatuyk, Victor I.,Pleshkova, Nadezhda V.

, p. 132 - 144 (2014/08/18)

The reaction of diarylketoacetylenes with ethylenediamine (EDA) leads to arylmethylketones and 2-substituted imidazoline derivatives. This transformation involves complete cleavage of the triple bond via initial intermolecular Michael-addition with subsequent intramolecular Michaeladdition. Final fragmentation can be presented as a retro-Mannich reaction, accompanied by three formal reductive stages (formation of three C-H bonds), while the other carbon undergoes a formal oxidation, in which three C-N bonds (C-N and C=N) are formed. ARKAT-USA, Inc.

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