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56271-34-2

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56271-34-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56271-34-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,2,7 and 1 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 56271-34:
(7*5)+(6*6)+(5*2)+(4*7)+(3*1)+(2*3)+(1*4)=122
122 % 10 = 2
So 56271-34-2 is a valid CAS Registry Number.

56271-34-2Relevant articles and documents

Iodine-Catalyzed Synthesis of Chiral 4-Imidazolidinones Using α-Amino Acid Derivatives via Dehydrogenative N-H/C(sp3)-H Coupling

Kanyiva, Kyalo Stephen,Tane, Marina,Shibata, Takanori

, p. 12773 - 12783 (2019/09/09)

An efficient method for the asymmetric synthesis of 4-imidazolidinones via an iodine-catalyzed intramolecular N-H/C(sp3)-H activation of readily available and abundant feedstocks, amino acids, and amines is described. The reaction proceeded under visible light irradiation to afford a variety of 4-imidazolidinone derivatives under mild conditions in moderate to excellent yields. Secondary and tertiary C(sp3)-H bonds were aminated, and various functional groups were tolerated.

Palladium-Catalyzed Modular Synthesis of Substituted Piperazines and Related Nitrogen Heterocycles

Montgomery, Thomas D.,Rawal, Viresh H.

, p. 740 - 743 (2016/03/01)

We report here a novel method for the modular synthesis of highly substituted piperazines and related bis-nitrogen heterocycles via a palladium-catalyzed cyclization reaction. The process couples two of the carbons of a propargyl unit with various diamine components to provide nitrogen heterocycles in generally good to excellent yields and high regio- and stereochemical control. (Chemical Equation Presented).

1,5-rhodium shift in rearrangement of N -arenesulfonylazetidin-3-ols into benzosultams

Ishida, Naoki,Shimamoto, Yasuhiro,Yano, Takaaki,Murakami, Masahiro

, p. 19103 - 19106 (2014/01/17)

Benzosultams are synthesized in an enantiopure form starting from α-amino acids through a rhodium-catalyzed rearrangement reaction of N-arenesulfonylazetidin-3-ols. Mechanistically, this reaction involves C-C bond cleavage by β-carbon elimination and C-H bond cleavage by a 1,5-rhodium shift.

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