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943784-90-5

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943784-90-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 943784-90-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,3,7,8 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 943784-90:
(8*9)+(7*4)+(6*3)+(5*7)+(4*8)+(3*4)+(2*9)+(1*0)=215
215 % 10 = 5
So 943784-90-5 is a valid CAS Registry Number.

943784-90-5Relevant articles and documents

Chiral bisformamides as effective organocatalysts for the asymmetric one-pot, three-component strecker reaction

Wen, Yuehong,Xiong, Yan,Chang, Lu,Huang, Jinglun,Liu, Xiaohua,Feng, Xiaoming

, p. 7715 - 7719 (2007)

(Chemical Equation Presented) C2-symmetric chiral bisformamides have been shown to catalyze the asymmetric one-pot, three-component Strecker reaction, which produced the α-amino nitriles in excellent yields (up to 99%) with good enantioselectiv

Modular synthesis of new bicyclic carbene precursors

Li, Jie,Yao, Jiaqi,He, Weiping,Yang, Fan,Liu, Xiaoming

, p. 951 - 954 (2019/11/22)

A series of new N-heterocyclic carbene (NHC) precursors, containing bicyclic pyrrolo[1,2-c]imidazole framework, were prepared from N-(tert-butoxycarbonyl)-L-proline (1-Boc-L-proline). The sequential attachment of nitrogen nucleophiles and subsequent ring

Chiral Lewis Base-Catalyzed, Enantioselective Reduction of Unprotected β-Enamino Esters with Trichlorosilane

Ye, Jianheng,Wang, Chao,Chen, Lin,Wu, Xinjun,Zhou, Li,Sun, Jian

, p. 1042 - 1047 (2016/04/19)

Catalytic asymmetric reduction of N-unsubstituted β-enamino esters represents a major challenge for asymmetric catalysis. In this paper, the first organocatalytic system that could be used for the asymmetric hydrosilylation of N-unsubstituted β-enamino esters has been developed. Using N-tert-butylsulfinyl-L-proline-derived amides and L-pipecolinic acid-derived formamides as catalyst, a broad range of β-aryl- and β-alkyl-substituted free β-amino esters could be prepared with high yields and enantioselectivities. The practicality was illustrated by the gram-scale asymmetric synthesis of ethyl (R)-3-amino-3-phenylpropanoate and isopropyl (S)-3-amino-4-(2,3,5-trifluorophenyl)butanoate. The resulting product can be smoothly transformed to the FDA approved medicines dapoxetine and sitagliptin in a short synthetic route.

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