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ChemInform Abstract: Photochemical Isomerizations of 5-Alkylidene-4,5-dihydro-3H-1,2,4(λ3)-diazaphospholes (4-Phosphapyrazolines): (5→4) Ring Contraction Generates Azomethineimine Dipoles.

✍ Scribed by B. MANZ; J. KERTH; G. MAAS

Publisher
John Wiley and Sons
Year
2010
Weight
42 KB
Volume
29
Category
Article
ISSN
0931-7597

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Photochemical Isomerizations of 5-Alkyli
Photochemical Isomerizations of 5-Alkylidene-4,5-dihydro-3H-1,2,4(λ3)-diazaphospholes (4-Phosphapyrazolines): (5→4) Ring Contraction Generates Azomethineimine Dipoles
✍ Berthold Manz; Jochen Kerth; Gerhard Maas 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 284 KB 👁 1 views

UV irradiation of the title compounds 1 a ± d results not in extrusion of molecular nitrogen, but in a skeletal rearrangement generating amino(imidoyl)phosphanes 2 a ± c from 1 a ± c and 2-hydrazinobenzo[b]phosphole 4 from 1 d. The first step in these isomerizations is an unprecedented (5 34) ring c

ChemInform Abstract: Thermal Reactions o
ChemInform Abstract: Thermal Reactions of 5-Alkylidene-4,5-dihydro-3H-1,2,4(λ3)-diazaphospholes (4-Phosphapyrazolines) — A Route to Various P-Heterocycles and to 2-Phosphabutadienes.
✍ B. MANZ; U. BERGSTRAESSER; J. KERTH; G. MAAS 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 39 KB 👁 1 views

## Thermal Reactions of 5-Alkylidene-4,5-dihydro-3H-1,2,4(λ 3 )diazaphospholes (4-Phosphapyrazolines) -A Route to Various P-Heterocycles and to 2-Phosphabutadienes. -The title diazaphospholes have a much higher thermal stability than their analogues without the exocyclic double bond. On thermolys