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1173089-28-5

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1173089-28-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1173089-28-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,7,3,0,8 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1173089-28:
(9*1)+(8*1)+(7*7)+(6*3)+(5*0)+(4*8)+(3*9)+(2*2)+(1*8)=155
155 % 10 = 5
So 1173089-28-5 is a valid CAS Registry Number.

1173089-28-5Relevant articles and documents

Synthesis of 4-alkylidene-4H-3,1-benzoxazine derivatives by acid-catalyzed cyclization of 2-isocyanophenyl ketones in the presence of a vinyl ether

Kobayashi, Kazuhiro,Okamura, Yuta,Konishi, Hisatoshi

, p. 1494 - 1498 (2009)

2-(1-Alkoxyalkyl)-4-alkylidene-4H-3,1-benzoxazines are conveniently prepared by the reaction of 1-(2-isocyanophenyl) ethanones or 1-(2-isocyanophenyl)propan-1-ones with a vinyl ether, such as 2-methoxypropene or ethyl vinyl ether, in the presence of a catalytic amount of (±)-camphor-10-sulfonic acid. Georg Thieme Verlag Stuttgart.

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