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117269-80-4

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117269-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117269-80-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,2,6 and 9 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 117269-80:
(8*1)+(7*1)+(6*7)+(5*2)+(4*6)+(3*9)+(2*8)+(1*0)=134
134 % 10 = 4
So 117269-80-4 is a valid CAS Registry Number.

117269-80-4Relevant articles and documents

Total synthesis of tryprostatins A and B

Yamakawa, Takayuki,Ideue, Eiji,Iwaki, Yuzo,Sato, Ayumu,Tokuyama, Hidetoshi,Shimokawa, Jun,Fukuyama, Tohru

scheme or table, p. 6547 - 6560 (2011/09/20)

Three distinct synthetic routes to the 2-prenyl tryptophan core skeleton of tryprostatins and their total syntheses are described. The strategies include a traditional gramine-mediated coupling reaction, Fuerstner indole synthesis, and our radical-mediated indole synthesis from o-alkenylphenyl isocyanide. The establishment of reliable conditions for the radical-mediated construction of indoles via a low-temperature radical initiator V-70 (2,2′-azobis(4- methoxy-2,4-dimethylvaleronitrile)) led to the highly efficient syntheses of tryprostatins A and B.

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