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51390-16-0

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51390-16-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51390-16-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,3,9 and 0 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 51390-16:
(7*5)+(6*1)+(5*3)+(4*9)+(3*0)+(2*1)+(1*6)=100
100 % 10 = 0
So 51390-16-0 is a valid CAS Registry Number.

51390-16-0Downstream Products

51390-16-0Relevant articles and documents

TBHP/Cu(OAc)2 mediated oxidation of pyrazolines: A convenient method for the preparation of pyrazoles

Kolla, Sai Teja,Somanaboina, Ramya,Bhimapaka, China Raju

, p. 1425 - 1432 (2021/02/27)

An efficient and simple oxidative protocol has been developed for the preparation of pyrazoles from pyrazolines mediated by TBHP/Cu(OAc)2 at room temperature. The present protocol has been successfully applied for the preparation of various pyrazole compounds from heterocyclic pyrazolines.

Visible light mediated metal-free oxidative aromatization of 1,3,5-trisubstituted pyrazolines

Annes, Sesuraj Babiola,Rajmohan, Rajamani,Ramesh, Subburethinam,Vairaprakash, Pothiappan

supporting information, (2019/07/22)

The visible light mediated oxidation of 1,3,5-trisubstituted pyrazolines under metal-free conditions was developed. Various substituted pyrazolines were oxidized to pyrazoles by irradiation with visible light/sunlight. A plausible mechanism was proposed f

Radical Addition of Hydrazones by α-Bromo Ketones to Prepare 1,3,5-Trisubstituted Pyrazoles via Visible Light Catalysis

Fan, Xiu-Wei,Lei, Tao,Zhou, Chao,Meng, Qing-Yuan,Chen, Bin,Tung, Chen-Ho,Wu, Li-Zhu

, p. 7127 - 7133 (2016/08/30)

A novel efficient tandem reaction of hydrazones and α-bromo ketones is reported for the preparation of 1,3,5-trisubstituted pyrazoles by visible light catalysis. In this system, the monosubstituted hydrazones show wonderful reaction activity with alkyl radicals, generated from α-bromo ketones. A radical addition followed by intramolecular cyclization affords the important pyrazole skeleton in good to excellent yields. This efficient strategy under mild conditions with wide group tolerance provides a potential approach to the 1,3,5-trisubstituted pyrazoles.

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