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1253801-90-9

1253801-90-9

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1253801-90-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1253801-90-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,3,8,0 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1253801-90:
(9*1)+(8*2)+(7*5)+(6*3)+(5*8)+(4*0)+(3*1)+(2*9)+(1*0)=139
139 % 10 = 9
So 1253801-90-9 is a valid CAS Registry Number.

1253801-90-9Downstream Products

1253801-90-9Relevant articles and documents

Facile synthesis of highly functionalized six-membered heterocycles via PPh3-catalyzed [4+2] annulations of activated terminal alkynes and hetero-dienes: Scope, mechanism, and application

Zhang, Qiongmei,Fang, Tong,Tong, Xiaofeng

supporting information; experimental part, p. 8095 - 8100 (2010/10/19)

A novel [4+2] annulation between activated terminal alkynes and aza-dienes or oxo-dienes has been developed with the use of triphenylphosphine catalyst (20 mol %), which provides a facile method for synthesis of the corresponding highly functionalized dih

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