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- Publisher
- Wiley
- Copyright
- "Copyright © 2014 Wiley Periodicals, Inc."
- ISSN
- 1042-7163
- eISSN
- 1098-1071
- DOI
- 10.1002/hc.21132
- Publisher site
- See Article on Publisher Site
Abstract
The [4+2] cycloaddition reaction of 1‐alkyl‐1,2‐diphospholes (1) with N‐phenylmaleimide proceeds at 25°С in toluene to give 1,7‐diphosphanorbornenes (2) as anti‐endo isomer only. Oxidation of 2 with air at room temperature or thionation with excess of sulfur at 80°С results in the formation of mixed valent PIII, PV 7‐oxo(thia)‐1,7‐diphosphanorbornenes (3, 4) in high yield. The polycyclic compounds 3 and 4 are air stable and have small sums of valence angles at the phosphorus atoms.
Journal
Heteroatom Chemistry – Wiley
Published: Jan 1, 2014