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475040-19-8

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475040-19-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 475040-19-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,7,5,0,4 and 0 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 475040-19:
(8*4)+(7*7)+(6*5)+(5*0)+(4*4)+(3*0)+(2*1)+(1*9)=138
138 % 10 = 8
So 475040-19-8 is a valid CAS Registry Number.

475040-19-8Downstream Products

475040-19-8Relevant articles and documents

Synthesis of functionalized indole- and benzo-fused heterocyclic derivatives through anionic benzyne cyclization

Barluenga, Jose,Fananas, Francisco J.,Sanz, Roberto,Fernandez, Yolanda

, p. 2034 - 2046 (2007/10/03)

The development of a new method for the regioselective synthesis of functionalized indoles and six-membered benzo-fused N-, O-, and S-heterocycles is reported. The key step involves the generation of a benzyne-tethered vinyl or aryllithium compound that undergoes a subsequent intramolecular anionic cyclization. Reaction of the organolithium intermediates with selected electrophiles allows the preparation of a wide variety of indole, tetrahydrocarbazole, dihydrofenantridine, dibenzopyran, and dibenzothiopyran derivatives. Finally, the application of this strategy to the appropriate starting materials allows the preparation of some tryptamine and serotonin analogues.

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