Stereostructure of 8-chloro-5,6-di(methoxycarbonyl)-4,7-dimethyl-2-ethoxy-2-phosphabicyclo[2.2.2]octa-5,7-diene 2-oxide
✍ Scribed by György Keglevich; László Tőke; Zsolt Böcskei; Dóra Menyhárd; Louis D. Quin
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 263 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1042-7163
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✦ Synopsis
Stereost ruct u re of 8-C h loro-5,6di( met hoxycarbonyI)-4,7=di met hyl-2-et hoxy-2phosphabicyclo[2.2.2]octa-5,7-diene 2-Oxide
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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
The stable 7-phosphanorbornadiene derivative, 2,3-benzo-1,4,5,6,7-pentaphenyl-7-phosphabicyclo[2.2.1]hepta-2,5-diene-7-oxide (1) was synthesized in 45% yield via the Diels-Alder reaction of pentaphenylphosphole oxide and benzyne. The reaction occurs specifically to give a single isomer, which was ch
## Differential thermal analysis and differential scanning calorimetry showed that the title compounds decomposed at 240-260°C with release of the fragment RP(0) = CH,. Mass spectral studies also showed this to be a fragmentation pathway. The extruded methylenephosphine oxide could be trapped with