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245662-01-5

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245662-01-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 245662-01-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,5,6,6 and 2 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 245662-01:
(8*2)+(7*4)+(6*5)+(5*6)+(4*6)+(3*2)+(2*0)+(1*1)=135
135 % 10 = 5
So 245662-01-5 is a valid CAS Registry Number.

245662-01-5Relevant articles and documents

Synthetic studies on indoles and related compounds. Part 46.1 First total syntheses of 4, 8-dioxygenated β-carboline alkaloids

Suzuki, Hideharu,Unemoto, Minoru,Hagiwara, Mayumi,Ohyama, Takako,Yokoyama, Yuusaku,Murakami, Yasuoki

, p. 1717 - 1723 (2007/10/03)

Total syntheses of naturally occurring 4, 8-dioxygenated β-carboline alkaloids 2a, 2d, 2g, and 2h are described. The synthetic route involves two methodologies that we developed; (i) an improved Fischer indolization for the synthesis of a 7-oxygenated indole using a tosyl group for protection of the phenolic group, (ii) construction of a 4-methoxy-β-carboline skeleton by the C-3-selective cyclization of the C-2-substituent of the indole nucleus. The phenolic O-tosyl group of the β-carboline skeleton was successfully cleaved to the phenol by Na-anthracenide, and this phenol was methylated with TMSCH2N2.

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