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872050-98-1

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872050-98-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 872050-98-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,2,0,5 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 872050-98:
(8*8)+(7*7)+(6*2)+(5*0)+(4*5)+(3*0)+(2*9)+(1*8)=171
171 % 10 = 1
So 872050-98-1 is a valid CAS Registry Number.

872050-98-1Downstream Products

872050-98-1Relevant 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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