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1339944-20-5

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1339944-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1339944-20-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,3,9,9,4 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1339944-20:
(9*1)+(8*3)+(7*3)+(6*9)+(5*9)+(4*4)+(3*4)+(2*2)+(1*0)=185
185 % 10 = 5
So 1339944-20-5 is a valid CAS Registry Number.

1339944-20-5Downstream Products

1339944-20-5Relevant academic research and scientific papers

Expedient entry to the piperazinohydroisoquinoline ring system using a sequential Ugi/Pictet-Spengler/reductive methylation reaction protocol

Cano-Herrera, Ma.-Angeles,Miranda, Luis D.

, p. 10770 - 10772 (2011)

An expedient entry to the piperazinohydroisoquinoline ring system present in the tetrahydroisoquinoline antitumor alkaloids family is described. The synthetic sequence involves: a sequential Ugi reaction followed by an N-Boc-deprotection process and iminium formation with a spontaneous Pictet-Spengler cyclization and reductive N-methylation, with all these processes performed in a two-operation protocol in the same reaction flask.

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