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194656-80-9

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194656-80-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 194656-80-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,6,5 and 6 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 194656-80:
(8*1)+(7*9)+(6*4)+(5*6)+(4*5)+(3*6)+(2*8)+(1*0)=179
179 % 10 = 9
So 194656-80-9 is a valid CAS Registry Number.

194656-80-9Relevant articles and documents

A unified strategy for the total synthesis of the angucycline antibiotics SF 2315A, urdamycinone B, and the shunt metabolite 104-2

Kim, Kyungjin,Boyd, Vincent A.,Sobti, Aditya,Sulikowski, Gary A.

, p. 3 - 22 (2007/10/03)

Total syntheses of the angucycline antibiotics SF 2315A (2), urdamycinone B (4), and the shunt metabolite 104-2 (5) are described, as well as an approach toward the synthesis of SF 2315B (3). All four syntheses feature a Diels-Alder cycloaddition between a bromojuglone derivative and an optically active diene (25a), the latter derived from (-)-quinic acid. Subsequent key transformations include (i) stereocontrolled introduction of ring fusion oxygen functionality featured in SF 2315A (2) and SF 2315 B (3), (ii) preparation of C-glycosyl juglone 53, and (iii) NMO mediated oxidative aromatization of 60.

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