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66120-17-0

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66120-17-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66120-17-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,1,2 and 0 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 66120-17:
(7*6)+(6*6)+(5*1)+(4*2)+(3*0)+(2*1)+(1*7)=100
100 % 10 = 0
So 66120-17-0 is a valid CAS Registry Number.

66120-17-0Relevant articles and documents

Stereoselective access to tetrahydropyranylacetic acid derivatives. Simple synthesis of (+)-(S,S)-(cis-6-methyltetrahydropyran-2-yl)acetic acid

Ragoussis,Theodorou

, p. 84 - 86 (2007/10/02)

The reaction of the lactols 1a-1d, with malonic acid in hot dimethyl sulfoxide, in the presence of piperidinium acetate as catalyst, gives the corresponding (tetrahydrofuran-2-yl)acetic acids 2a, c and (tetrahydropyran-2-yl)acetic acids 2b, d in high yield (65-75%). While the synthesis of the (6-methyltetrahydropyran-2-yl)acetic acid (2d) is highly stereoselective (cis/trans ratio 20:1), no stereoselection was observed with the (5-methyltetrahydrofuran-2-yl)acetic acid (2c) (cis/trans ratio 1:1). This reaction was applied for the synthesis of natural (+)-(S,S)-(cis-6-methyltetrahydropyran-2-yl)acetic acid (7), minor constituent of the glandular secretion of the civet cat.

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