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4042-39-1

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4042-39-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4042-39-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,4 and 2 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 4042-39:
(6*4)+(5*0)+(4*4)+(3*2)+(2*3)+(1*9)=61
61 % 10 = 1
So 4042-39-1 is a valid CAS Registry Number.
InChI:InChI=1/C15H14O3/c1-9(2)7-8-12-13(16)10-5-3-4-6-11(10)14(17)15(12)18/h3-9,16H,1-2H3/b8-7+

4042-39-1Relevant articles and documents

Synthesis and cytotoxicity evaluation of a series of 3-alkenyl-2-hydroxy-1,4-naphthoquinones obtained by an efficient knoevenagel condensation

David, Cibelle C.,Lins, Antonio C.S.,Silva, Tania M.S.,Campos, Júlia F.,Silva, Teresinha G.,Milit?o, Gardenia C.G.,Camara, Celso A.

, p. 8 - 18 (2018/12/13)

A modified and efficient Knoevenagel condensation procedure was developed to synthesize the title compounds using β-alanine and acetic acid as catalysts, showing good to excellent yields. We used lawsone with suitable aliphatic aldehydes including isobuty

Palladium(II)-Catalyzed C-H Bond Activation/C-C Coupling/Intramolecular Tsuji-Trost Reaction Cascade: Facile Access to 2 H -Pyranonaphthoquinones

Bian, Jinlei,Qian, Xue,Wang, Nan,Mu, Tong,Li, Xiang,Sun, Haopeng,Zhang, Lianshan,You, Qidong,Zhang, Xiaojin

supporting information, p. 3410 - 3413 (2015/07/28)

An efficient one-pot synthesis of 2H-pyranonaphthoquinone was achieved via a palladium-catalyzed C-H bond activation/C-C bond formation/intramolecular Tsuji-Trost reaction cascade. The unprecedented procedure exhibits excellent functional group tolerance, giving the target naphthoquinones in moderate to good isolated yields (40-88%) under mild reaction conditions. Scalable production of the product can make this reaction a method of choice for the synthesis of 2H-pyranonaphthoquinones.

Reaction of 2-Hydroxy-1,4-naphthoquinone with Aldehydes. Synthesis of 2-Hydroxy-3-alk-1-enylnaphthoquinones.

Bock, Klaus,Jacobsen, Niels,Terem, Bulent

, p. 659 - 664 (2007/10/02)

In the course of an unsuccessful attempt to prepare 2-(3,7-dimethylocta-1,6-dienyl)-3-hydroxy-1,4-naphthoquinone (1a) by acid catalyzed condensation of 2-hydroxy-1,4-naphthoquinone (2) with citronellal, a tetracyclic quinone (3) was obtained.This quinone

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