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131043-43-1

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131043-43-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131043-43-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,0,4 and 3 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131043-43:
(8*1)+(7*3)+(6*1)+(5*0)+(4*4)+(3*3)+(2*4)+(1*3)=71
71 % 10 = 1
So 131043-43-1 is a valid CAS Registry Number.

131043-43-1Downstream Products

131043-43-1Relevant articles and documents

Novel Ring Enlargement of Lactams via Quinazolinone Annelation. A Facile Route to Benzoannelated Large-Membered Cyclic 1,5-Diamines

Takeuchi, Hisato,Matsushita, Yuji,Eguchi, Shoji

, p. 1535 - 1537 (2007/10/02)

A novel route to benzoannelated large-membered cyclic 1,5-diamines from lactams is described.Thus, n-membered lactames 1 were N-acylated by o-azidobenzoyl chloride 5 to afford the corresponding imides 4.These were treated with tributylphosphine and underw

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