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156455-52-6

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156455-52-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156455-52-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,4,5 and 5 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 156455-52:
(8*1)+(7*5)+(6*6)+(5*4)+(4*5)+(3*5)+(2*5)+(1*2)=146
146 % 10 = 6
So 156455-52-6 is a valid CAS Registry Number.

156455-52-6Downstream Products

156455-52-6Relevant articles and documents

The stereochemical course of bromoetherification of enynes

Christopher Braddock,Bhuva, Roshni,Perez-Fuertes, Yolanda,Pouwer, Rebecca,Roberts, Craig A.,Ruggiero, Andrea,Stokes, Elaine S. E.,White, Andrew J. P.

, p. 1419 - 1421 (2008/12/21)

Enynes undergo stereoselective syn intramolecular bromoetherification; the stereochemical course of the reaction was elucidated by X-ray crystallographic studies and by stereospecific synthesis of authentic bromoallenes. The Royal Society of Chemistry.

A new procedure for highly stereoselective and regioselective synthesis of 2-ethynyl-3-hydroxytetrahydropyran derivatives based on alkyne-Co2(CO)6 complex

Mukai, Chisato,Sugimoto, Yu-Ichi,Ikeda, Yoshitaka,Hanaoka, Miyoji

, p. 823 - 850 (2007/10/03)

Treatment of trans-epoxides 3 with Co2(CO)8 gave the corresponding cobalt complexes, which were subsequently exposed to a catalytic amount of BF3·OEt2 at -78°C to provide exclusively cis-2-ethynyl-3- hydroxytetrahydropyran derivatives via endo mode cyclization pathway. cis- Congeners, cis-3 afforded the corresponding trans tetrahydropyran derivatives exclusively. This novel cyclization has been found to proceed with retention of configuration at the propynyl stereogenic center. Requirement for stereoselectivity in cyclization was discussed.

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