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156305-20-3

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156305-20-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156305-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,3,0 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 156305-20:
(8*1)+(7*5)+(6*6)+(5*3)+(4*0)+(3*5)+(2*2)+(1*0)=113
113 % 10 = 3
So 156305-20-3 is a valid CAS Registry Number.

156305-20-3Relevant articles and documents

Stereodivergent Palladium- And Rhodium-Catalyzed Intramolecular Addition of Tosylureas to Allenes: Diastereoselective Synthesis of Tetrahydropyrimidinones

Breit, Bernhard,Geissler, Arne G. A.,Riesterer, Jasmin R.

, p. 9168 - 9172 (2021/12/06)

The intramolecular addition of tosylureas to allenes is highly syn-/anti-diastereoselective when employing a palladium or rhodium-based catalytic system and affords 1,3-cyclic ureas. Under palladium catalysis a range of thermodynamic anti-tetrahydropyrimi

Rhodium-Catalyzed Diastereoselective Cyclization of Allenyl-Sulfonylcarbamates: A Stereodivergent Approach to 1,3-Aminoalcohol Derivatives

Spreider, Pierre A.,Haydl, Alexander M.,Heinrich, Marc,Breit, Bernhard

supporting information, p. 15569 - 15573 (2016/12/09)

A diastereoselective and stereodivergent rhodium-catalyzed intramolecular coupling of sulfonylcarbamates with terminal allenes is described and it provides selective access to 1,3-aminoalcohol derivatives, scaffolds found in bioactive compounds. The reaction is compatible with a large range of different functional groups, thus furnishing products with high diastereoselectivities and yields. Moreover, multigram scale reactions, as well as the application of suitable product transformations were demonstrated.

An efficient synthesis of terminal allenes from terminal 1-alkynes

Kuang, Jinqiang,Shengming, Ma.

supporting information; experimental part, p. 1763 - 1765 (2009/08/19)

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