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70981-26-9

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70981-26-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 70981-26-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,9,8 and 1 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 70981-26:
(7*7)+(6*0)+(5*9)+(4*8)+(3*1)+(2*2)+(1*6)=139
139 % 10 = 9
So 70981-26-9 is a valid CAS Registry Number.

70981-26-9Relevant articles and documents

Synthesis, reactivity and stereochemistry of new phosphorus heterocycles with 5- or 6-membered rings

Cristau, Henri-Jean,Pirat, Jean-Luc,Virieux, David,Monbrun, Jér?me,Ciptadi, Ciptadi,Bekro, Yves-Alain

, p. 2472 - 2481 (2007/10/03)

Syntheses of novel phosphorus heterocycles containing α-amino or α-hydroxyphosphonic or phosphinic acids motifs are developed. 2,3-dihydro-1,3-oxaphospholes (1) and 1,4,2-oxazaphosphinanes (2) exhibit a reactive part, respectively the enolether moiety and the P-H bond, which allows various structural modifications: (i) for 1a, by introduction of amino substituents, (ii) for 2a, by hydroxy- or aminoalkylation, by Michael addition or by P-arylation. These reactions present generally a good or even an excellent kinetic diastereoselectivity which can often be predicted by molecular models of the transition states.

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