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181356-21-8

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181356-21-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 181356-21-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,3,5 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 181356-21:
(8*1)+(7*8)+(6*1)+(5*3)+(4*5)+(3*6)+(2*2)+(1*1)=128
128 % 10 = 8
So 181356-21-8 is a valid CAS Registry Number.

181356-21-8Downstream Products

181356-21-8Relevant articles and documents

The synthesis of the N-ethoxycarbonyl derivative of 5-azabicyclo[2.1.0]-pent-2-ene (Dewar pyrrole) - The first member of the parent ring-system

Warrener, Ronald N.,Amarasekara, Ananda S.,Russell, Richard A.

, p. 1519 - 1520 (1996)

N-Ethoxycarbonyl Dewar pyrrole 9, the first member of the parent ring, is formed via photofragmentation of 6 at -60°C and trapped as its adduct with 1,3-diphenylisobenzofuran 11; above this temperature, 9 is unstable and isomerises to N-ethoxycarbonylpyrrole 10.

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