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134858-17-6

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134858-17-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134858-17-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,8,5 and 8 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 134858-17:
(8*1)+(7*3)+(6*4)+(5*8)+(4*5)+(3*8)+(2*1)+(1*7)=146
146 % 10 = 6
So 134858-17-6 is a valid CAS Registry Number.

134858-17-6Relevant articles and documents

Synthesis of 1,6-Methanoannulenopyridines by Tandem Aza-Wittig Reaction/Electrocyclisation

Bohn, Thomas,Kramer, Walter,Neidlein, Richard,Suschitzky, Hans

, p. 947 - 952 (2007/10/02)

Iminophosphoranes 1 (X = PPh3) derived from the corresponding 1,6-methanoannulenes have been made to react with isothiocyanates and also with aromatic aldehydes to give, by an aza-Wittig reaction followed by cyclisation, novel 1,6-methanoannulenopyridines of structural types 2 and 6.Aza-Wittig reactions of the 2-triphenylphosphoranylideneamino derivative 3 (x = PPh3) with aromatic aldehydes or isothtiocyanates led to the Schiff's bases 3 (X = CHAr) or carbodiimides (X = C=NAr) respectively.The latter on treatment with enamines gave, by a Diels-Alder cyclisation, the annulenopyridines 12.

The Synthesis of Novel N-Heterocycles from 2-Azido-, 2-Vinylazido- and 2-Formyl-1,6-Methanoannulene-2-carbaldehydes

Suschitzky, Hans,Kramer, Walter,Neidlein, Richard,Rosyk, Peter,Bohn, Thomas

, p. 923 - 927 (2007/10/02)

The preparation of 2-azido-1,6-methanoannulene 2 from 2-lithioannulene is described.The annulene 2 underwent ring expansion on thermolysis in the presence of various secondary amines to give novel bridged aza-annulenes of type 3 and also gave 1,3-dipolar addition products.When heated the vinyl azides 13 (R1 = R2 = H) and 13 underwent cyclisation to give the annulenopyrroles 14 and 15 respectively.Annulenopyridines such as 18 were obtained from the iminophosphorane 16 via an aza-Wittig reaction with phenyl or allyl isothiocyanate or tolyl isocyanate.Some 2-formyl derivatives 1 (R1 = CHO) when treated with tosylmethyl isocyanide yielded oxazolylannulenes 19.

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