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670260-38-5

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670260-38-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 670260-38-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,0,2,6 and 0 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 670260-38:
(8*6)+(7*7)+(6*0)+(5*2)+(4*6)+(3*0)+(2*3)+(1*8)=145
145 % 10 = 5
So 670260-38-5 is a valid CAS Registry Number.

670260-38-5Relevant articles and documents

Chemistry of xanthorrhizol: synthesis of several bisabolane sesquiterpenoids from xanthorrhizol

Sirat, Hasnah M.,Hong, Ngai Mun,Jauri, Muhd Haffiz

, p. 457 - 460 (2008/02/04)

(-)-Xanthorrhizol (1) isolated from the rhizomes of Curcuma xanthorrhiza has been transformed to several bisabolane-type sesquiterpenoids, in a stereoselective manner. 10R- and 10S-10,11-dihydro-10,11-dihydroxyxanthorrhizols (2, 3), (-)-curcuquinone (4),

Enantioselective total synthesis of (-)-curcuquinone via regioselective chromium-mediated benzannulation

Minatti, Ana,Doetz, Karl Heinz

, p. 3745 - 3748 (2007/10/03)

(Chemical Equation Presented) A short and efficient, high-yielding enantioselective total synthesis of the marine natural product (-)-curcuquinone 1 is reported involving a regioselective [3 + 2 + 1]-benzannulation reaction as the key step. Additionally, this strategy allows the isolation of curcuhydroquinone monomethyl ether 9 as an intermediate of the benzannulation reaction and its subsequent further protection toward diversified hydroquinones.

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