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606933-61-3

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606933-61-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 606933-61-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,0,6,9,3 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 606933-61:
(8*6)+(7*0)+(6*6)+(5*9)+(4*3)+(3*3)+(2*6)+(1*1)=163
163 % 10 = 3
So 606933-61-3 is a valid CAS Registry Number.

606933-61-3Relevant articles and documents

An improved synthesis of ethyl cis-5-iodo-trans-2-methylcyclohexanecarboxylate, a potent attractant for the Mediterranean fruit fly

Khrimian, Ashot,Margaryan, Armenak Kh.,Schmidt, Walter F.

, p. 5475 - 5480 (2007/10/03)

Both racemic ethyl 5-iodo-2-methylcyclohexanecarboxylate (1), known as Mediterranean fruit fly attractant ceralure B1, and its (-)-(1R,2R,5R) enantiomer 1a were conveniently synthesized from commercially available racemic trans-6-methyl-3-cyclohexenecarboxylic acid 2 or its (1R,6R) enantiomer 2a. Key steps included an asymmetric Diels-Alder reaction using a sultam auxiliary and cyclization of the unwanted trans-5-iodo-trans-2-methylcyclohexanecarboxylic acid (8) to the intermediate lactone 7 (or 8a to 7a). The new method may circumvent chromatographic separations and seems amenable to scale-up.

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