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17697-67-5

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17697-67-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 17697-67-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,6,9 and 7 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 17697-67:
(7*1)+(6*7)+(5*6)+(4*9)+(3*7)+(2*6)+(1*7)=155
155 % 10 = 5
So 17697-67-5 is a valid CAS Registry Number.

17697-67-5Relevant articles and documents

A general one-pot synthesis of vinyl-thiiranes and conjugated dienes

Maciagiewicz,Dybowski,Skowronska

, p. 515 - 523 (2007/10/03)

The first general synthesis of vinyl-thiiranes 7 and an effiecient preparation of conjugated dienes 8 and 9 is presented. Methodology described for the preparation of these compounds is based on the corresponding readily available thiophosphates 1 and selenophosphates 2.

Trans-Selective Olefination of Carbonyl Compounds by Low-Valent Titanium-Mediated Dehydroxybenzotriazolylation

Katritzky, Alan R.,Cheng, Dai,Henderson, Scott A.,Li, Jianqing

, p. 6704 - 6709 (2007/10/03)

Lithiation with n-butyllithium of a variety of benzotriazole derivatives 1a-f and 5a-d, all containing a proton α to the benzotriazolyl moiety, gave anions which underwent addition to aliphatic, aromatic, and α,β-unsaturated aldehydes and cyclic and acyclic ketones. The resultant N-(β-hydroxyalkyl)benzotriazole derivatives 3a-m, 6a-g, 9a-d, and 10a were dehydroxybenzotriazolylated when treated with low-valent titanium to give alkenes 4a-m, dienes 7a- j, and triene 11a, with selectivity for the trans isomers without separation of diastereoisomeric intermediates. This method offers an alternative to the three most frequently used methods for the formation of alkenes from carbonyl compounds-the Wittig, Peterson, and Julia reactions-especially in the formation of tri- and tetrasubstituted alkenes.

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