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130791-77-4

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130791-77-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 130791-77-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,7,9 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 130791-77:
(8*1)+(7*3)+(6*0)+(5*7)+(4*9)+(3*1)+(2*7)+(1*7)=124
124 % 10 = 4
So 130791-77-4 is a valid CAS Registry Number.

130791-77-4Relevant articles and documents

Synthetic method of huperzine A

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Paragraph 0075; 0077; 0118-0121, (2019/05/15)

The invention belongs to the technical field of medicine synthesis and particularly relates to a synthetic method of huperzine A. The method includes twelve steps of reactions, 1,4-dioxaspiro[4.5]decan-8-one being a raw material, so that the chemical synthesis of the huperzine A is completed at a high total yield. The method is fewer in reaction steps, is simple in operations, has high yield, is stable in intermediates and gentle in reaction conditions, and is easy to control in reactions.

METHODS OF RESOLVING RACEMIC MIXTURE TO OBTAIN (-)-HUPERZINE A

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Page/Page column 10, (2016/04/26)

A method of resolving a racemic mixture of (±) Huperzine A to (-)-Huperzine A includes: separating the (-)-Huperzine A from the racemic mixture of (±) Huperzine A by chiral high performance liquid chromatography (HPLC), the chiral HPLC being performed utilizing a mobile phase including a solution including an alcohol and one selected from dichloromethane, trichloromethane, and a mixture thereof, and the chiral HPLC being performed utilizing a chiral stationary phase including a polysaccharide derivative.

An efficient total synthesis of (-)-huperzine A

Ding, Rui,Sun, Bing-Feng,Lin, Guo-Qiang

supporting information, p. 4446 - 4449 (2012/10/29)

The total synthesis of Lycopodium alkaloid (-)-huperzine A has been accomplished in 10 steps with 17% overall yield from commercially abundant (R)-pulegone. The synthetic route features an efficient synthesis of 4 via a Buchwald-Hartwig coupling reaction,

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