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1078202-83-1

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1078202-83-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1078202-83-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,7,8,2,0 and 2 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1078202-83:
(9*1)+(8*0)+(7*7)+(6*8)+(5*2)+(4*0)+(3*2)+(2*8)+(1*3)=141
141 % 10 = 1
So 1078202-83-1 is a valid CAS Registry Number.

1078202-83-1Relevant articles and documents

Aryl trialkylsilyl ketenes: Acid-catalyzed synthesis from 1-aryl-2-diazo-2-trialkylsilylethanones and their conversion into 3-silyl-1-silyloxyallenes

Bucher, Stefan M.,Brueckmann, Ralf,Maas, Gerhard

experimental part, p. 4426 - 4433 (2009/05/07)

Aryl-substituted α-silyl α-diazo ketones are readily transformed into aryl silyl ketenes in the presence of a catalytic amount of triflic acid. Thus, a convenient method to prepare these silyl ketenes becomes available, which combines two steps, silylation of an aryl diazomethyl ketone and acid-induced Wolff rearrangement of the formed α-silyl α-diazo ketone, in a one-pot procedure. It appears that the trialkyl-ammonium salt, which is formed in the silylation step, can also catalyze the Wolff rearrangement, but distinctly more slowly than the proton acid. The silyl ketenes react smoothly with α-silyl α-diazo ketones to form 3-silyl-1-silyloxyallenes in fairly good yields. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

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