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177903-43-4

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177903-43-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177903-43-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,9,0 and 3 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 177903-43:
(8*1)+(7*7)+(6*7)+(5*9)+(4*0)+(3*3)+(2*4)+(1*3)=164
164 % 10 = 4
So 177903-43-4 is a valid CAS Registry Number.

177903-43-4Downstream Products

177903-43-4Relevant articles and documents

The Reactions of Carbene Intermediates from the Reaction of Trialkyl Phosphites with Dialkyl Benzoylphosphonates: Intramolecular Cyclisations of 2-Substituted Dialkyl Benzoylphosphonates

Griffiths, D. Vaughan,Griffiths, Penelope A.,Karim, Khalku,Whitehead, Belinda J.

, p. 901 - 925 (2007/10/03)

The reaction of dialkyl aroylphosphonates 1 with trialkyl phosphites leads to the formation of carbene intermediates 3 via the anionic intermediates 2.The carbene intermediates 3 (R = 2-Me, 2-Prn, 2-Bun, 2-MeS, 2-EtO and 2-EtS) have

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