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1245209-77-1

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1245209-77-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1245209-77-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,5,2,0 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1245209-77:
(9*1)+(8*2)+(7*4)+(6*5)+(5*2)+(4*0)+(3*9)+(2*7)+(1*7)=141
141 % 10 = 1
So 1245209-77-1 is a valid CAS Registry Number.

1245209-77-1Upstream product

1245209-77-1Relevant articles and documents

Synthesis of benz[d]oxazolones involving concomitant acetyl migration from oxygen to nitrogen

Ray, Sibdas,Ghosh, Sukla

experimental part, p. 2377 - 2388 (2010/09/07)

Heating of o-acetoxybenzoyl azides 6-10 in toluene leads to the Curtius reaction, which, when followed by closure of oxazolone ring with concomitant migration of acetyl group from oxygen to nitrogen, produces 3-acetoxybenz[d] oxazol-2(3H)-ones 11-15, which undergo hydrolysis with hot dilute hydrochloric acid to furnish benz[d]oxazol-2(3H)-ones 17-21. Thermal reaction of 2-hydroxy-5-nitrobenzoyl azide (22) in toluene finally yields a mixture of 5-nitrobenz[d]oxazol-2(3H)-one (20) and 5-nitrobenz[d]isoxazol-3(2H)-one (23). Copyright Taylor & Francis Group, LLC.

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