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137043-30-2

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137043-30-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137043-30-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,0,4 and 3 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 137043-30:
(8*1)+(7*3)+(6*7)+(5*0)+(4*4)+(3*3)+(2*3)+(1*0)=102
102 % 10 = 2
So 137043-30-2 is a valid CAS Registry Number.

137043-30-2Relevant articles and documents

One-pot α-amidosulfone-mediated variation of the pictet-Spengler tetrahydroisoquinoline synthesis, suitable for amide-type substrates

Arroyo, Francisco J.,López-Alvarado, Pilar,Ganesan,Menéndez, J. Carlos

, p. 5720 - 5727 (2014/11/07)

The development of Pictet-Spengler reactions from amide substrates is a challenging problem. We report here that the reaction between amide-type compounds (including carbamates, amides, ureas and diketopiperazines), aldehydes and p-toluenesulfinic acid constitutes an efficient method for the preparation of tetrahydroisoquinolines or pyrazino-[2,1-b]isoquinolines. Unlike previously known methods, this one-pot Pictet-Spengler protocol avoids the need for strong Lewis or Br?nsted acid catalysts.

Saframycin synthetic studies

Shawe, Thomas T.,Liebeskind, Lanny S.

, p. 5643 - 5666 (2007/10/02)

A conceptually simple and direct synthetic route to racemic saframycyn B, a bis-isoquinoline quinone antitumor antibiotic, was studied relying on transformations of a key C-2 symmetric intermediate.

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