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21420-36-0

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21420-36-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21420-36-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,2 and 0 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21420-36:
(7*2)+(6*1)+(5*4)+(4*2)+(3*0)+(2*3)+(1*6)=60
60 % 10 = 0
So 21420-36-0 is a valid CAS Registry Number.

21420-36-0Relevant articles and documents

Nam et al.

, p. 57,59 (1966)

v.Schuching,Barnes

, p. 3817 (1950)

Syntheses of 3H-labeled, 14C-labeled, and 2H4-labeled SCH 444877, phosphodiesterase type 5 inhibitors

Ren, Sumei,Hesk, David,McNamara, Paul,Koharski, David,Hendershot, Sharon

, p. 480 - 484 (2014/03/21)

The syntheses of [3H]SCH 444877, [2H4]SCH 444877, and [14C]SCH 444877 are described. [3H]SCH 444877 was prepared in three steps from tritium gas. [2H4]SCH 444877 was synthesized from [2H4]ethanolamine in four steps with an overall yield of 40%. [14C]SCH 444877 was prepared from barium [14C]cyanamide in 10 steps with an overall yield of 8.1%. Copyright

METHODS AND INTERMEDIATES FOR THE PREPARATION OF OPTIONALLY RADIO-LABELED IMATINIB

-

Page/Page column 16-17, (2008/06/13)

The invention relates to new processes for the manufacture of N-{5-[4-(4-methyl-piperazino- methyl)-benzoylamido]-2-methylphenyl}-4-(3-pyridyl)-2-pyrimidine-amine of formula (I), new processes for the manufacture of metabolites of N-{5-[4-(4-methyl-piperazino-methyl)- benzoylamido]-2-methylphenyl}-4-(3-pyridyl)-2-pyrimidine-amine observed after administration of the compound to warm-blooded animals as well as to intermediates used in said processes. New starting materials as well as processes for the preparation thereof are likewise the subject of this invention. The processes described herein are especially suitable to furnish said compounds having isotopic labeling. The such obtained labeled compounds are in particular suitable to track and to investigate into the metabolism of N-{5-[4-(4-methyl- piperazino-methyl)-benzoylamido]-2-methylphenyl}-4-(3-pyridyl)-2-pyrimidine-amine and its pharmaceutically acceptable salts in clinical and pre-clinical studies.

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