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159528-61-7

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159528-61-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 159528-61-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,5,2 and 8 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 159528-61:
(8*1)+(7*5)+(6*9)+(5*5)+(4*2)+(3*8)+(2*6)+(1*1)=167
167 % 10 = 7
So 159528-61-7 is a valid CAS Registry Number.

159528-61-7Downstream Products

159528-61-7Relevant articles and documents

Synthetic applications of C,C-bis(iminophosphoranes): Preparation of [5+5] rigid bicyclic guanidines and 1,3,6-benzothiadiazepino[3,2-a] benzimidazole derivatives

Molina, Pedro,Lidon, Ma. Josefa,Tarraga, Alberto

, p. 10029 - 10036 (2007/10/02)

Aza Wittig-type reaction of bis(iminophosphorane)1, derived from bis(2-aminophenyl)amine with two equivalents of isocyanate directly provided benzimidazo[1,2,a]benzimidazole derivatives 2. However, the reaction with one equivalent of isocyanate or carbon disulfide afforded C-aryl iminophosphoranes 3 or 6, respectively, derived from the 1-phenylbenzimidazole ring, which underwent cyclization by the action of one equivalent of isocyanate to give the [5+5] rigid bicyclic guanidines 2 or 1,3,6-benzothiadiazepino[3,2-a] benzimidazole 8.

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