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126921-77-5

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126921-77-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 126921-77-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,6,9,2 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 126921-77:
(8*1)+(7*2)+(6*6)+(5*9)+(4*2)+(3*1)+(2*7)+(1*7)=135
135 % 10 = 5
So 126921-77-5 is a valid CAS Registry Number.

126921-77-5Relevant articles and documents

A general and efficient synthesis of 2-substituted oxazolopyridines

Xu, Dan,Xu, Xianfang,Liu, Zongliang,Sun, Li-Ping,You, Qidong

scheme or table, p. 1172 - 1174 (2009/08/09)

Starting from commercially available halonitropyridines and haloaminopyridines, 2-substituted-oxazolo[5,4-b]pyridines, and 2-aryl-oxazolo[4,5-b]pyridines were synthesized in good yields by using a Cu(I)-mediated cyclization of halopyridylamides as a key step. Georg Thieme Verlag Stuttgart.

A New Convenient Synthesis of 2-Aryl- and 2-Heteroaryloxazolopyridines

Flouzant, Christine,Guillaumet, Gerald

, p. 64 - 66 (2007/10/02)

Several 2-aryl- and 2-heteroaryloxazolopyridines were synthesized in high yields from 3-(arylcarbonylamino)-2-chloropyridines by heating in the presence of trimethylsilylpolyphosphate ester.

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