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22073-92-3

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22073-92-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22073-92-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,0,7 and 3 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 22073-92:
(7*2)+(6*2)+(5*0)+(4*7)+(3*3)+(2*9)+(1*2)=83
83 % 10 = 3
So 22073-92-3 is a valid CAS Registry Number.

22073-92-3Relevant articles and documents

Regioselective cyclization of 2-alkynylbenzoic acid in water for the synthesis of isocoumarin

Wang, Yan-Hua,Qiu, Guanyinsheng,Zhou, Hongwei,Xie, Wenlin,Liu, Jin-Biao

supporting information, p. 3850 - 3855 (2019/06/17)

In this work, a regioselective synthesis of isocoumarins from 2-alkynylbenzoic acid is reported. The transformations proceed smoothly with good yields in water via a metal-free radical pathway. When catalytic TBAB is employed, the reaction provides various isocoumarin derivatives according to the structures of the corresponding precursors. It is believed that TBAB serves as a phase transfer catalyst and radical initiator in the reaction. Compared to previous methodologies, the synthetic procedure reported herein provides a more environmentally benign route for the synthesis of isocoumarins.

Design, synthesis, and pharmacological evaluation of N-acylhydrazones and novel conformationally constrained compounds as selective and potent orally active phosphodiesterase-4 inhibitors

Kümmerle, Arthur E.,Schmitt, Martine,Cardozo, Suzana V. S.,Lugnier, Claire,Villa, Pascal,Lopes, Alexandra B.,Romeiro, Nelilma C.,Justiniano, Hélène,Martins, Marco A.,Fraga, Carlos A. M.,Bourguignon, Jean-Jacques,Barreiro, Eliezer J.

, p. 7525 - 7545 (2012/11/06)

Among a small series of tested N-acylhydrazones (NAHs), the compound 8a was selected as a selective submicromolar phosphodiesterase-4 (PDE4) inhibitor associated with anti-TNF-α properties measured both in vitro and in vivo. The recognition pattern of compound 8a was elucidated through molecular modeling studies based on the knowledge of the 3D-structure of zardaverine, a PDE4 inhibitor resembling the structure of 8a, cocrystallized with the PDE4. Based on further conformational analysis dealing with N-methyl-NAHs, a quinazoline derivative (19) was designed as a conformationally constrained NAH analogue and showed similar in vitro pharmacological profile, compared with 8a. In addition 19 was found active when tested orally in LPS-evoked airway hyperreactivity and fully confirmed the working hypothesis supporting this work.

6-endo-dig Cyclization of heteroarylesters to alkynes promoted by Lewis acid catalyst in the presence of Br?nsted acid

Hellal, Malik,Bourguignon, Jean-Jacques,Bihel, Frédéric J.-J.

, p. 62 - 65 (2008/09/17)

We report a regiocontrolled 6-endo-dig cyclization of 2-(2-arylethynyl)heteroaryl esters occurred under Br?nsted acidic conditions and in the presence of a catalytic amount of Lewis acids such as Cu(OTf)2, AuCl3, or (CF3CO

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