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170211-89-9

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170211-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 170211-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,0,2,1 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 170211-89:
(8*1)+(7*7)+(6*0)+(5*2)+(4*1)+(3*1)+(2*8)+(1*9)=99
99 % 10 = 9
So 170211-89-9 is a valid CAS Registry Number.

170211-89-9Relevant articles and documents

Enantiomerically Pure 6-Substituted 2-Oxo-cyclohexanecarboxylates by Conjugate Addition of Cuprates to Asymmetric Shielded 2-Oxo-cyclohexenecarboxylates

Urban, Ernst,Riehs, Gerhard,Knuehl, Guido

, p. 11149 - 11164 (2007/10/02)

Asymmetric shielded 2-oxo-cyclohexenecarboxylates 6n and 6x were prepared by transesterification of 2-oxo-cyclohexanecarboxylate 2 with camphor derived concave alcohols 1n and 1x and by subsequent introduction of a double bond via phenylselenides.Diastereoselective conjugate addition of equimolar amounts of mixed cuprates at -78 deg C and deprotection by methanolysis gave enantiomerically pure 6-substituted 2-oxo-cyclohexanecarboxylates 14-19 and ent-14-19, valuable as chiral building blocks in natural product synthesis.

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