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13555-18-5

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13555-18-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13555-18-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,5,5 and 5 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 13555-18:
(7*1)+(6*3)+(5*5)+(4*5)+(3*5)+(2*1)+(1*8)=95
95 % 10 = 5
So 13555-18-5 is a valid CAS Registry Number.

13555-18-5Relevant articles and documents

Acetylation de trimethylsilyl bicyclo(n,1,0)alcanes : nouvelles syntheses de l'acetyl cyclohexene-2 et d'acetyl bicyclo(n,1,0)alcanes

Ahra, M.,Grignon-Dubois, M.

, p. 820 - 824 (2007/10/02)

Acetylation of trimethylsilyl bicyclo(n,1,0)alkanes was studied using the CH3COCl/AlCl3 complex.The results showed that both larger cycle size (n = 3, 4 or 6) and stereochemistry of the substrate (SiMe3 group in endo or exo position) played a prominent role in the orientation of the reaction : depending upon the starting products, either bicyclic or ethylenic and/or chloro ketones were formed.The results can be rationalized in terms of steric hindrance considerations.They allowed us to propose a new convenient synthesis of acetyl bicyclo(n,1,0)alkanes and also of 1-acetyl 2-cyclohexene.

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