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142312-21-8

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142312-21-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142312-21-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,3,1 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 142312-21:
(8*1)+(7*4)+(6*2)+(5*3)+(4*1)+(3*2)+(2*2)+(1*1)=78
78 % 10 = 8
So 142312-21-8 is a valid CAS Registry Number.

142312-21-8Relevant articles and documents

Catalytic Aerobic Cross-Dehydrogenative Coupling of Azlactones en Route to α,α-Disubstituted α-Amino Acids

Tsuji, Taro,Tanaka, Takafumi,Tanaka, Tsukushi,Yazaki, Ryo,Ohshima, Takashi

, p. 4164 - 4170 (2020/06/04)

We developed a catalytic aerobic method to synthesize α,α-disubstituted α-amino acids through cross-dehydrogenative coupling of azlactones. Combining an iron catalyst with a bisoxazolidine ligand resulted in high catalytic performance, and cross-coupling with an indole proceeded smoothly under aerobic conditions. A wide variety of α-aryl and aliphatic amino acid derived azlactones were applied to the present catalysis. In addition, a quaternary carbon could be constructed using oxindole and benzofuranone under aerobic conditions.

OXAZOLONES. PART VI. REACTION OF 5(4H)-OXAZOLONES WITH NITRILE IMINES: SYNTHESIS OF 1H-1,2,4-TRIAZOLES THROUGH CYCLOADDITION

Gelmi, Maria Luisa,Pocar, Donato,Riva, Raul

, p. 315 - 320 (2007/10/02)

5(4H)-Oxazolones (1) react as dipolarophiles in cycloadditions with nitrile imines generated from tetrazoles (2) in refluxing anisole affording two 1H-1,2,4-triazole derivatives (3) and diarylethylenes (4).

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