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99564-80-4

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99564-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99564-80-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,6 and 4 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99564-80:
(7*9)+(6*9)+(5*5)+(4*6)+(3*4)+(2*8)+(1*0)=194
194 % 10 = 4
So 99564-80-4 is a valid CAS Registry Number.

99564-80-4Relevant articles and documents

Utilisation de Me3SiI prepare in situ pour l'obtention de bis(trimethylsiloxy-1,3) diene-1,3

Babot, O.,Cazeau, P.,Duboudin, F.

, p. C57 - C60 (1987)

The in situ generation of iodotrimethylsilane, in the presence of triethylamine, is a convenient route to 1,3-bis(trimethylsiloxy)-1,3-diene.

Bis-Silyloxydienes from Diketones

Hansson, Lars,Carlson, Rolf

, p. 304 - 306 (2007/10/02)

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Reactions of Trialkylsilyl Trifluoromethanesulfonates, III. - Synthesis of 1,3-Bis(trimethylsiloxy)-1,3-dienes and 3-Trimethylsiloxy-2-butenoates Silylated in Position 4

Kraegeloh, Konrad,Simchen, Gerhard,Schweiker, Kurt

, p. 2352 - 2362 (2007/10/02)

Bis(trimethylsiloxy)-1,3-dienes 5a - n are obtained by reaction of 1,3-dicarbonyl compounds 1 with trimethylsilyl trifluoromethanesulfonate (2) in the presence of triethylamine (3).The silyl enol ether 8 is silylated by 2/3 to yield 1,3-bis(trimethylsiloxy)-1,3-butadiene (5o).Depending on the conditions, alkyl 3-oxobutanoates 12 react with 2/3 to give the γ-silylated alkyl 3-trimethylsiloxy-2-butenoates 15 or 16.

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