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136409-28-4

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136409-28-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136409-28-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,4,0 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 136409-28:
(8*1)+(7*3)+(6*6)+(5*4)+(4*0)+(3*9)+(2*2)+(1*8)=124
124 % 10 = 4
So 136409-28-4 is a valid CAS Registry Number.

136409-28-4Relevant articles and documents

N-Vinylketenimines

Capuano, Lilly,Braun, Claudia,Kuehn, Frank

, p. 15 - 18 (2007/10/02)

The title compounds 5 are generated in situ from N-vinyliminotriphenylphosphoranes 1 and ketenes 2 in a Wittig-type reaction.The phosphoranes are useful intermediates for the preparation of numerous heterocycles as illustrated by the formation of 1,3-oxazines 8, pyridinones 9, pyrimidinones 10 and 1,3-thiazines 11.Water adds readily to 5 to yield vinylacetamides 7, whereas thermal rearrangement gives rise to the isoquinoline 4 or the spiro system 6, respectively.Under very mild conditions, crystalline precursors (type 3) of the N-vinylketenimines, which still contain the triphenylphosphonio group, have been isolated.These react like the N-vinylketenimines generated in situ, giving however less byproducts. Key Words: Phosphorus ylides / Ketenes / Ketenimines

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