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32142-34-0

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32142-34-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 32142-34-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,1,4 and 2 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 32142-34:
(7*3)+(6*2)+(5*1)+(4*4)+(3*2)+(2*3)+(1*4)=70
70 % 10 = 0
So 32142-34-0 is a valid CAS Registry Number.

32142-34-0Relevant articles and documents

Chiral Phosphoric Acid Catalyzed Enantioselective Synthesis of α-Tertiary Amino Ketones from Sulfonium Ylides

Guo, Wengang,Li, Pingfan,Luo, Yuzheng,Sun, Jianwei,Sung, Herman H.-Y.,Williams, Ian D.

, p. 14384 - 14390 (2020/09/15)

Herein we disclose a new catalytic asymmetric approach for the synthesis of chiral α-Amino ketones, which is particularly useful for the less accessible acyclic α-Tertiary cases. By a protonation-Amination sequence, our approach represents a rare asymmetric H-heteroatom bond insertion by α-carbonyl sulfonium ylides, an attractive surrogate of diazocarbonyls. The mild intermolecular C-N bond formation was catalyzed by chiral phosphoric acids with excellent efficiency and enantioselectivity. The products are precursors to other important chiral amine derivatives, including drug molecules and chiral ligands. The enantioselectivity was controlled by dynamic kinetic resolution in the amination step, rather than the initial protonation. This process opens up a new platform for the development of other related insertion reactions.

Synthesis of α-heterosubstituted ketones through sulfur mediated difunctionalization of internal alkynes

Zhang, Zhong,Luo, Yuzheng,Du, Hongguang,Xu, Jiaxi,Li, Pingfan

, p. 5156 - 5161 (2019/06/05)

Synthesis of α-heterosubstituted ketones was achieved through sulfur mediated difunctionalization of internal alkynes in one pot. The reaction design involves: phenyl substituted internal alkyne attacking triflic anhydride activated diphenyl sulfoxide to

Highly diastereoselective synthesis of tertiary alcohols via intramolecular Baylis-Hillman reaction using less reactive acrylamides as activated alkenes and ketones as electrophiles

Basavaiah, Deevi,Reddy, Guddeti Chandrashekar,Lingaiah, Balthu,Naganaboina, Ram Tilak

, p. 859 - 867 (2017/01/29)

A simple and convenient protocol for highly diastereoselective intramolecular Baylis-Hillman (IBH) reaction of substrates containing less reactive acrylamides as activated alkene and ketones with α-chiral center (racemic) as electrophile components, thus

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