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1226527-27-0

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1226527-27-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1226527-27-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,6,5,2 and 7 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1226527-27:
(9*1)+(8*2)+(7*2)+(6*6)+(5*5)+(4*2)+(3*7)+(2*2)+(1*7)=140
140 % 10 = 0
So 1226527-27-0 is a valid CAS Registry Number.

1226527-27-0Relevant articles and documents

Transition-metal-free formal sonogashira coupling and α-carbonyl arylation reactions

Prueger, Birgit,Hofmeister, Gretchen E.,Jacobsen, Christian Borch,Alberg, David G.,Nielsen, Martin,Jorgensen, Karl Anker

supporting information; experimental part, p. 3783 - 3790 (2010/07/13)

Transition-metal-free formal Sonogashira coupling and α-carbonyl arylation reactions have been developed. These transformations are based on the nucleophilic aromatic substitution (SNAr) of β-carbonyl sulfones to electron-deficient aryl fluorides, producing a key intermediate that, depending on the reaction conditions, gives the aromatic alkynes or α-aryl carbonyl compounds. The development of these reactions is presented and, based on investigations under basic and acidic conditions, mechanisms have been proposed. To develop the formal disclosed that expands the reaction concept. The scope of these reactions is demonstrated for the synthesis of Sonogashira and α-carbonyl arylated products from a range of electron-deficient aryl fluorides with a variety of functional groups and aryl-, heteroaryl-, alkyl-, and alkoxy-substituted sulfone nucleophiles. These transition-metal-free reactions complement the metal-catalyzed versions in terms of substitution patterns, simplicity, and reaction conditions.

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