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213599-21-4

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213599-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213599-21-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,5,9 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 213599-21:
(8*2)+(7*1)+(6*3)+(5*5)+(4*9)+(3*9)+(2*2)+(1*1)=134
134 % 10 = 4
So 213599-21-4 is a valid CAS Registry Number.

213599-21-4Relevant articles and documents

A sequential metal-catalyzed C-N bond formation in the synthesis of 2-amido-indoles

Yao, Pei-Yuan,Zhang, Yu,Hsung, Richard P.,Zhao, Kang

supporting information; experimental part, p. 4275 - 4278 (2009/05/30)

(Chemical Equation Presented) A sequential metal-catalyzed C-N bond formation employing ortho-haloaryl acetylenic bromides is described. The initial amidation is highly selective for C8P-N bond formation, leading to o-haloaryl-substiluted ynami

Synthesis of enantiopure estrone via a double heck reaction

Tietze, Lutz F.,N?bel, Thomas,Spescha, Maurus

, p. 8971 - 8977 (2007/10/03)

A novel efficient catalytic approach to steroids by a double Heck reaction of the vinyl bromides 2 and the CD-building block 3 is presented. The new estrogen analogues 1a and 1b are formed via 23a and 23b in a highly regio- and stereoselective manner in g

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