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90490-63-4

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90490-63-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90490-63-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,4,9 and 0 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 90490-63:
(7*9)+(6*0)+(5*4)+(4*9)+(3*0)+(2*6)+(1*3)=134
134 % 10 = 4
So 90490-63-4 is a valid CAS Registry Number.

90490-63-4Downstream Products

90490-63-4Relevant articles and documents

A new route to N-substituted heterocycles

Katritzky, Alan R.,Lang, Hengyuan,Lan, Xiangfu

, p. 2829 - 2838 (1993)

N-(Benzotriazol-1-ylmethyl)-indole, - pyrrole, -carbazole, and -benzimidazole, and analogs substituted in the methylene group are converted by lithium aluminum hydride, or by Grignard reagents, or in two cases by organozinc reagents, into the N-substituted heterocycles in good yields.

Base-catalyzed rearrangement of α-benzotriazolyl alkoxide anions: Synthesis of one-carbon homologated α-substituted alkyl ketones

Katritzky, Alan R.,Zhang, Zhongxing,Lang, Hengyuan,Xie, Linghong

, p. 187 - 194 (2007/10/03)

Deprotonated benzotriazole derivatives (1a-c) reacted with aldehydes to give the α-oxyanion substituted intermediates (2), which upon further treatment with butyllithium, without separation, resulted in the formation of one-carbon homologated α-substituted alkyl ketones (6a-f). Similar treatment of benzotriazole derivatives (1d-f) generated the benzotriazole ring-opening and rearranged products (7a-f). Plausible mechanisms for these reactions have been proposed.

A Facile and Convenient Synthesis of the Unknown 1-Aroylmethyl-1H-pyrroles

Artico, Marino,Corelli, Federico,Massa, Silvio,Stefancich, Giorgio

, p. 931 (2007/10/02)

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