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Toluene-4-sulfonic acid (E)-5-(1-ethoxy-ethoxy)-hepta-4,6-dienyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128844-99-5

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128844-99-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128844-99-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,4 and 4 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 128844-99:
(8*1)+(7*2)+(6*8)+(5*8)+(4*4)+(3*4)+(2*9)+(1*9)=165
165 % 10 = 5
So 128844-99-5 is a valid CAS Registry Number.

128844-99-5Relevant academic research and scientific papers

Synthesis of Pyrrolizidines and Indolizidines by the Intramolecular Cycloaddition of Azides with Electron-Rich 1,3-Dienes. A Synthetic Equivalent of a Nitrene-Diene Cycloaddition

Pearson, William H.,Bergmeier, Stephen C.,Degan, Samir,Lin, Ko-Chung,Poon, Yam-Foo,et al.

, p. 5719 - 5738 (2007/10/02)

Alkyl azides were found to undergo intramolecular cycloadditions with certain 1,3-dienes to provide 2,3,5,7a-tetrahydro-1H-pyrrolizines and 3,5,6,7,8,8a-hexahydroindolizines in one operation (e.g., 12 -> 13 and 17 -> 18).The presence of an electron-donati

INTRAMOLECULAR AZIDE-DIENE CYCLOADDITIONS. AN APPROACH TO FUSED BICYCLIC 3-PYRROLINES BASED ON A ONE-POT NITRENE-DIENE CYCLOADDITION EQUIVALENT.

Pearson, William H.,Celebuski, Joseph E.,Poon, Yam-Foo,Dixon, Brian R.,Glans, Jeffrey H.

, p. 6301 - 6304 (2007/10/02)

Cyclization of heterosubstituted ο-azidodienes 11 provides fused bicyclic 3-pyrrolines 12 in one operation.These pyrrolines are potentially useful intermediates for natural products synthesis, as illustrated by further functionalization.

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