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271784-23-7

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271784-23-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 271784-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,1,7,8 and 4 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 271784-23:
(8*2)+(7*7)+(6*1)+(5*7)+(4*8)+(3*4)+(2*2)+(1*3)=157
157 % 10 = 7
So 271784-23-7 is a valid CAS Registry Number.

271784-23-7Downstream Products

271784-23-7Relevant articles and documents

Synthesis of fused systems in the isoquinoline series: Oxazolo- and pyrrolo[3,2-c]isoquinolines

Briere, Jean-Francois,Dupas, Georges,Queguiner, Guy,Bourguignon, Jean

, p. 1371 - 1383 (2007/10/03)

In order to synthesize the pyrrolo[3,2-c]isoquinoline structure, three different routes starting from readily available isoquinolines were tried. The ring closure reaction of a malonic derivative of 4-amino-3- bromoisoquinoline led to an oxazolo[3,2-c]isoquinoline instead of the target molecule. This latter was obtained via Sonagashira coupling reaction followed by ring closure under basic conditions. A study of the lithiation of the N- sulfonated pyrrolo[3,2-c]isoquinoline was undertaken. After optimization of the lithiation conditions, various 2-substituted pyrrolo[3,2-c]isoquinolines were obtained and their oxidation reactions studied.

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