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67902-75-4

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67902-75-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67902-75-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,9,0 and 2 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 67902-75:
(7*6)+(6*7)+(5*9)+(4*0)+(3*2)+(2*7)+(1*5)=154
154 % 10 = 4
So 67902-75-4 is a valid CAS Registry Number.

67902-75-4Relevant articles and documents

α-Methylphenacyl thioesters as convenient thioacid precursors

Hatanaka, Toru,Yuki, Ryosuke,Saito, Ryota,Sasaki, Kaname

, p. 10589 - 10592 (2016/11/30)

α-Methylphenacyl (Mpa) thioesters are described as precursors of thioacids. Mpa thioesters are accessible via the condensation of carboxylic acids and phenacyl thiol, which is easily prepared without column chromatography. The Mpa thioesters are selectively deprotected by reduction with zinc dust in the presence of conventional thioacid protecting groups. In addition, the Mpa group exhibits orthogonal reactivity to the Boc group. These features are expected to facilitate the preparation of complex thioacids, including those in peptides.

Synthesis of multisubstituted furans, pyrroles, and thiophenes via ynolates

Shindo, Mitsuru,Yoshimura, Yutaka,Hayashi, Maiko,Soejima, Hiroe,Yoshikawa, Takashi,Matsumoto, Kenji,Shishido, Kozo

, p. 1963 - 1966 (2008/02/02)

An efficient synthetic method for the preparation of multisubstituted furans, thiophenes, and pyrroles using ynolates was developed. This novel formal [4 + 1] annulation by C2-C3 and C3-C4 bond formations Includes cycloaddition, cyclization, decarboxylati

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