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913003-75-5

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913003-75-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 913003-75-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,3,0,0 and 3 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 913003-75:
(8*9)+(7*1)+(6*3)+(5*0)+(4*0)+(3*3)+(2*7)+(1*5)=125
125 % 10 = 5
So 913003-75-5 is a valid CAS Registry Number.

913003-75-5Downstream Products

913003-75-5Relevant articles and documents

Synthesis of aromatic spiroacetals related to γ-rubromycin based on a 3H-spiro[1-benzofuran-2,2′-chromane] skeleton

Tsang, Kit Yee,Brimble, Margaret A.

, p. 6015 - 6034 (2008/02/02)

The synthesis of a series of aromatic 5,6-benzannelated and naphthyl-benzannelated spiroacetals related to the spiroacetal unit present in the quinonoid antibiotic γ-rubromycin is reported. The key steps include the use of Sonogashira coupling to construct an aryl acetylene that is coupled to an aryl aldehyde forming a propargyl alcohol intermediate. Hydrogenation of the resultant alkynol followed by oxidation produces a masked dihydroxyketone that upon treatment with silica-supported sodium hydrogen sulfate undergoes concomitant deprotection and cyclisation to afford the desired fused aromatic spiroacetal.

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