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16723-77-6

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16723-77-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16723-77-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,7,2 and 3 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 16723-77:
(7*1)+(6*6)+(5*7)+(4*2)+(3*3)+(2*7)+(1*7)=116
116 % 10 = 6
So 16723-77-6 is a valid CAS Registry Number.

16723-77-6Relevant 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.

A novel methodology for synthesis of dihydropyrazole derivatives as potential anticancer agents

Wang, Xu,Pan, Ying-Ming,Huang, Xiao-Chao,Mao, Zhong-Yuan,Wang, Heng-Shan

supporting information, p. 2028 - 2032 (2014/03/21)

A novel, simple, and efficient method for the synthesis of 4,5-dihydropyrazole derivatives has been developed. The reaction proceeded through the base-induced isomerization of easily accessible propargyl alcohols followed by cyclization of α,β-unsaturated hydrazones. Furthermore, selected compounds 3ab and 3ac exhibited good activities against Bel-7404 (human hepatoma cancer), HepG2 (human liver cancer), NCI-H460 (human lung cancer) and SKOV3 (human ovarian cancer) cell lines with IC50 in the range of 22-46 μmol L-1.

Synthesis of 3,5-disubstituted pyrazoles and their derivatives

Ingle,Doshi,Raut,Kadu

, p. 1691 - 1698 (2012/06/15)

2-Acetylthiophene condenses with different aromatic aldehyde in ethanol in the presence of aqueous NaOH to give 1-(2′-thienyl)-3-(substituted phenyl)-2-propen-1-one (Ia-e) which reacts with hydrazine hydrate in ethanol to give pyrazoline (IIa-e) and also treated with DMSO in presence of catalytic amount of iodine to give pyrazole (II′a-e) Similarly, 1-phenyl pyrazoline (IIIa-e) treated with DMSO/I2 to give 1-phenyl pyrazole(III′a- e), 1-(2,4-dinitro phenyl) pyrazoline (IVa-e) treated with DMSO/I2 to give 1-(2,4-dinitro phenyl) pyrazole(IV′a-e), 1-carboxamido pyrazoline (Va-e) treated with DMSO/I2 to give 1-carboxamido pyrazole (V′a-e), 1-acetyl pyrazoline (VIa-e) treated with DMSO/I2 to give 1-acetyl pyrazole (VI′a-e), 1-benzoyl pyrazoline (VIIa-e) treated with DMSO/I2 to give 1-benzoyl pyrazole (VII′a-e) and 1-nitroso pyrazoline (VIIIa-e) treated with DMSO/I2 to give 1-nitroso pyrazole (VIII′a-e). Characterization and structural elucidation was carried out on the basis of melting points determination, analytical and spectral studies.

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