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142890-17-3

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142890-17-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142890-17-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,8,9 and 0 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 142890-17:
(8*1)+(7*4)+(6*2)+(5*8)+(4*9)+(3*0)+(2*1)+(1*7)=133
133 % 10 = 3
So 142890-17-3 is a valid CAS Registry Number.

142890-17-3Relevant articles and documents

Synthetic studies of carzinophilin. Part 1: Synthesis of 2-methylidene-1-azabicyclo[3.1.0]hexane systems related to carzinophilin

Hashimoto, Masaru,Matsumoto, Miyoko,Terashima, Shiro

, p. 3019 - 3040 (2003)

Synthesis of the model compounds of carzinophilin carrying 2-methylidene-1-aza-bicyclo[3.1.0]hexane systems was achieved. Formation of malonylidenes or N-acyl-glycinylidenepyrrolidines was carried out by utilizing Eschenmoser's sulfide contraction or Herdeis's condensation between the 2-methylthio-Δ1-pyrrolone derivatives and ethyl nitroacetate, respectively. The 1-azabicyclo-[3.1.0]hexane systems were constructed by base-promoted aziridine formation.

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