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Pyridinium dichlorophosphinomethylides by Raj K. Bansal; Neelima Gupta; Mukta Baweja; Leena Hemrajani; Vimal K. Jain is a Chemistry article available to read on EtoBox.

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## Abstract Seven new pyridinium dichlorophosphinomethylides **2** have been obtained from dichlorophosphinylation of the pyridinium methylides generated in situ. **2** give 1,3‐bis(alkoxycarbonyl)‐2‐phosphaindolizines **4** through 1,5‐electrocyclization of the intermediate, bis(pyridinium ylidyl)phosphenium chloride **3** which is generated either from disproportionation of **2** or from the reaction of **2** with pyridinium methylide. Formation of **3** has been confirmed by carrying out a crossed reaction. 3‐Substituted **2** forms **4** regiospecifically. Intramolecular 1,5‐cyclocondensation of 2‐methylpyridinium dichlorophosphinomethylide is preferred over its disproportionation. © 2001 John Wiley & Sons, Inc. Heteroatom Chem 12:602–609, 2001

Who reads Pyridinium dichlorophosphinomethylides?

Author

Raj K. Bansal; Neelima Gupta; Mukta Baweja; Leena Hemrajani; Vimal K. Jain

Publisher

John Wiley and Sons; Hindawi Limited; John Wiley & Sons Inc.; Wiley (ISSN 1042-7163)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)