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1757-29-5

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1757-29-5 Usage

Structure

1H-pyrrole-2,5-dicarboxylic acid with two methyl ester groups attached

Type

Ester of pyrrole-2,5-dicarboxylic acid

Usage

Building block in the synthesis of organic compounds and pharmaceuticals, potential use in the development of new materials with specific electronic and optical properties, potential as a ligand in metal coordination chemistry

Safety

Handle with care and in accordance with proper safety protocols.

Check Digit Verification of cas no

The CAS Registry Mumber 1757-29-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,5 and 7 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1757-29:
(6*1)+(5*7)+(4*5)+(3*7)+(2*2)+(1*9)=95
95 % 10 = 5
So 1757-29-5 is a valid CAS Registry Number.

1757-29-5Relevant articles and documents

Lithiations of 1-Trialkylsilylpyrroles: N to C Silyl Group Rearrangement

Chadwick, Derek J.,Hodgson, Simon T.

, p. 1833 - 1836 (2007/10/02)

The sites of metallation with alkyl-lithium reagents of 1-trimethylsilyl- and 1-triethylsilyl-pyrroles have been explored under a variety of conditions.With short reaction times, BunLi reacts with 1-trimethylsilylpyrrole in hexane predominantly at the 2-position though with ButLi in pentane the unusual 3-metallated product is preferred.During prolonged reaction of 1-trimethylsilyl- and 1-triethylsilyl-pyrroles with ButLi, the 2-monolithio- and the 2,4- and 2,5-dilithio-intermediates are formed, in which, unexpectedly, the silyl groups migrate to the pyrrole 2-position.Under conditions favouring enhanced ionicity, BunLi cleaves the N-SiMe3 bond in preference to ring metallation.

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