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32121-42-9

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32121-42-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 32121-42-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,1,2 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 32121-42:
(7*3)+(6*2)+(5*1)+(4*2)+(3*1)+(2*4)+(1*2)=59
59 % 10 = 9
So 32121-42-9 is a valid CAS Registry Number.

32121-42-9Relevant academic research and scientific papers

Blue light-promoted cyclopropenizations of N-tosylhydrazones in water

Yan, Kaichuan,He, Hua,Li, Jianglian,Luo, Yi,Lai, Ruizhi,Guo, Li,Wu, Yong

, p. 3984 - 3987 (2021/06/15)

Carbene transfer reactions play an important role in the field of organic synthesis because of their ability to construct a variety of molecules. Herein, we reported on blue light-induced cyclopropenizations of N-tosylhydrazones in water, which avoids the use of expensive metal-based catalysts and toxic organic solvents. This metal-free and operationally simple methodology enable highly efficient cyclopropenizations, X-H insertion reactions, and cyclopropanation under mild reaction conditions.

Visible Light-Promoted Sulfoxonium Ylides Synthesis from Aryl Diazoacetates and Sulfoxides

Lu, Juan,Li, Lei,He, Xiang-Kui,Xu, Guo-Yong,Xuan, Jun

, p. 1646 - 1650 (2021/05/28)

A visible light-promoted reaction of donor/acceptor diazoalkanes with sulfoxides towards the synthesis of synthetically useful sulfoxonium ylides was reported. The reaction occurred under sole visible light irradiation without the need of any transition-metals or additives, affording the corresponding sulfoxonium ylides in moderate to good yields. The success of late-stage modification of natural isolates or drug candidates, scale-up reaction and transformation of sulfoxonium ylides to other useful molecules further rendered the approach valuable.

Blue Light-promoted Carbene Transfer Reactions of Tosylhydrazones

Xu, Yingying,Lv, Guanghui,Yan, Kaichuan,He, Hua,Li, Jianglian,Luo, Yi,Lai, Ruizhi,Hai, Li,Wu, Yong

supporting information, p. 1945 - 1947 (2020/06/08)

Metal-free photochemical carbene-transfer reactions of tosylhydrazones were developed under blue light irradiation at room temperature. This reaction constructs C?X (X=C, N, O, S) bonds and cyclopropanes from readily available and stable starting material

α-Thiocarbonyl synthesis via the FeII-catalyzed insertion reaction of α-diazocarbonyls into S-H bonds

Keipour, Hoda,Jalba, Angela,Tanbouza, Nour,Carreras, Virginie,Ollevier, Thierry

supporting information, p. 3098 - 3102 (2019/03/26)

Fe(OTf)2 was used to catalyze the insertion reaction of α-diazocarbonyls into S-H bonds at 40 °C. A wide range of α-thioesters were obtained in yields up to 96% within 24-48 h from their corresponding α-diazoesters. A variety of thiols were use

Synthesis of γ-Sulfur-Substituted Ketones via Rh(II)/Sc(III) a Cocatalyzed Three-Component Reaction of Diazo Compounds with Thiophenols and Enones

Xiao, Guolan,Ma, Chaoqun,Wu, Xiang,Xing, Dong,Hu, Wenhao

, p. 4786 - 4791 (2018/04/26)

A facile method for the synthesis of γ-sulfur-substituted ketones is developed via a Rh(II)/Sc(III) cocatalyzed three-component reaction of diazo compounds with thiophenols and enones. With this method, different γ-sulfur-substituted ketones were obtained

Copper-Catalyzed Carbenoid Insertion Reactions of α-Diazoesters and α-Diazoketones into Si-H and S-H Bonds

Keipour, Hoda,Jalba, Angela,Delage-Laurin, Léo,Ollevier, Thierry

, p. 3000 - 3010 (2017/03/23)

An efficient copper-catalyzed carbenoid insertion reaction of α-diazo carbonyl compounds into Si-H and S-H bonds was developed. A wide range of α-silylesters and α-thioesters was obtained in high yields (up to 98%) from α-diazoesters using 5 mol% of a simple copper(I) salt as catalyst. Using 0.05 mol% of the same catalyst, α-diazoketones led to α-silylketones in low to good yields (up to 70%).

Catalyst-Free S–S Bond Insertion Reaction of a Donor/Acceptor-Free Carbene by a Radical Process: A Combined Experimental and Computational Study

Zheng, Yang,Bian, Rongjian,Zhang, Xiaolu,Yao, Ruwei,Qiu, Lihua,Bao, Xiaoguang,Xu, Xinfang

, p. 3872 - 3877 (2016/08/16)

Herein, a donor/acceptor-free carbene insertion reaction of an S–S bond through a radical process is presented. This catalyst-free reaction was thermally induced and provided the dithioketal products in moderate to high yields. A mechanism involving radical intermediates was proposed according to the computational study, and these intermediates were verified experimentally and intercepted for the first time by using a cross-coupling reaction.

Enantioselective Synthesis of α-Mercapto-β-amino Esters via Rh(II)/Chiral Phosphoric Acid-Cocatalyzed Three-Component Reaction of Diazo Compounds, Thiols, and Imines

Xiao, Guolan,Ma, Chaoqun,Xing, Dong,Hu, Wenhao

supporting information, p. 6086 - 6089 (2016/12/09)

An enantioselective method for the synthesis of α-mercapto-β-amino esters has been developed via a rhodium(II)/chiral phosphoric acid-cocatalyzed three-component reaction of diazo compounds, thiols, and imines. This transformation is proposed to proceed t

N-H and S-H insertions over Cu(I)-zeolites as heterogeneous catalysts

Saha, Pipas,Jeon, Himchan,Mishra, Pratyush Kumar,Rhee, Hyun-Woo,Kwak, Ja Hun

, p. 10 - 18 (2016/04/05)

N-H and S-H insertion reactions of α-diazoesters into amines and thiols were conducted using various Cu(I)-zeolites, such as zeolite Y, Y USY, ZSM-5, and beta. All the Cu(I)-zeolites successfully catalyzed N-H insertion reactions with high product yields

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