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Fragmentation-Related Phosphinylations Using 2-Aryl-2-phosphabicyclo[2.2.2]oct-5-ene- and -octa-5,7-diene 2-Oxides.

✍ Scribed by Gyoergy Keglevich; Helga Szelke; Agnes Balint; Timea Imre; Krisztina Ludanyi; Zoltan Nagy; Miklos Hanusz; Kalman Simon; Veronika Harmat; Laszlo Toeke

Publisher
John Wiley and Sons
Year
2003
Weight
117 KB
Volume
34
Category
Article
ISSN
0931-7597

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Fragmentation-related phosphinylations u
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## Abstract A series of new P‐methylphenyl P‐heterocycles are introduced. The para and ortho substituted 2,5‐dihydro‐1H‐phosphole oxides (**__1a__** and **__1b__**) were converted to the double‐bond isomers (**__A__** and **__B__**) of 1,2‐dihydrophosphinine oxides (**__3a__** and **__3b__**) via t

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## Abstract The [4 + 2] cycloaddition of the double‐bond isomers (**__A__** and **__B__**) of dihydrophosphinine oxide **__1__** afforded novel phosphabicyclo[2.2.2]oct‐5‐ene derivates (**__2–4__**), formation of which was justified by PM3 semiempirical calculations. The compounds of dimer type (**

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A 2-phosphabicyclo[2.2.2]oct-7-ene oxide (2) and a 2-phosphabicyclo[2.2.2]octa-5,7-diene oxide (3) with ethyl substituent on the phosphorus atom was synthesized and their fragmentation properties were studied. The phosphabicyclooctadiene oxide (3) could be utilized in both the UV light-mediated phos