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422570-19-2

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422570-19-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 422570-19-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,2,5,7 and 0 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 422570-19:
(8*4)+(7*2)+(6*2)+(5*5)+(4*7)+(3*0)+(2*1)+(1*9)=122
122 % 10 = 2
So 422570-19-2 is a valid CAS Registry Number.

422570-19-2Relevant articles and documents

Temperature-Dependent Enantio- and Diastereodivergent Synthesis of Amino Acids with One or Multiple Chiral Centers

Fan, Shiming,Liu, Shouxin,Zhu, Sufang,Feng, Juan,Zhang, Zhiwei,Huang, Jing

, p. 4660 - 4663 (2017)

A general and facile methodology for temperature-dependent enantiodivergent and diastereodivergent synthesis of amino acids with one or multiple chiral centers was developed. Camphor-based tricyclic iminolactones attack electrophiles from the endo face at low temperature (-78 to -40 °C) and from the exo face at high temperature (-10 to 25 °C).

Chiral tricyclic iminolactone derived from (1R)-(+)-camphor as a glycine equivalent for the asymmetric synthesis of α-amino acids

Xu, Peng-Fei,Chen, Yuan-Shek,Lin, Shu-I,Lu, Ta-Jung

, p. 2309 - 2314 (2007/10/03)

The development of a highly efficient and stereoselective methodology for the preparation of α-amino acids is described. The chiral template, tricyclic iminolactone 7, was synthesized from (1R)-(+)-camphor in five steps in 50% overall yield. Alkylation of iminolactone 7 afforded the α-monosubstituted products in good yields (74-96%) and excellent diastereoselectivities (>98%). Hydrolysis of the alkylated iminolactones furnished the desired α-amino acids in good yields and enantioselectivities with nearly quantitative recovery of the chiral auxiliary 4.

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