Cope rearrangement phospha

An intriguing [3,3] -phospha-Cope rearrangement has been suggested to underlie the formation of 49 [89]. The initial step is considered to be the addition of transient (OC)5W=P-C(CH3)=CH2 to 2,3-dimethyl-1,3-butadiene to give 48,... 

Cope rearrangement, 33 301, 303 P = C bond energy estimation, 33 299-300 phospha Cope rearrangements, 33 300-301 ring expansion, 33 300-301 structure criteria for 3,3-diphospha Cope rearrangement, 33 301-302 valence isomerization, 33 303-305... 

Phosphabuta 1,3-dienes, 33 321-322 Phospay Cope rearrangement, 33 293 Phospha Cope rearrangement... 

Commercial development of calcium polyphosphate fibres Discovery of new class of aluminophosphate molecular sieves Preparation of first carbophosphene - (bis methylene phosphorane) Discovery of Phospha-Cope rearrangement Synthesis of first compound with an As=P bond Cyclo-P, triple decker compound made First asymmetric hydrogenation catalyst discovered (a metallophosphine complex)... 

Phospha-Cope rearrangements occur with some tetraphosphahexadienes (3.53). 

Derivatives of 1,3,4,6 tetraphosphahexadiene are of special interest because in some of them sigma-tropic rearrangements take place. When equivalent structures are involved, these are known as Phospha-Cope rearrangements and they entail the rapid replacement of R-P= by R-P and vice versa (Chapter 3.2). 

The reactions of bis(trimethylsilyl)diphosphine with 2,4,6-tri-ter-butylphenyl phospha ketene lead to trimethylsiloxy-substituted tetraphosphahexadienes which do not undergo phospha-cope rearrangements. 

Zinc azaenolates Ai-4-Aza-3-ketosteroids 43,916 7-Azaoxindoles 43,422 Aza-oxy-Cope rearrangement 44, 641 Azapeptides -, review 20, 236s44 A phospha-Cope rearrangement 41, 689s43... 

Kawashima, T., Kihara, T., Inamoto, N. The azaphospha-Cope rearrangement of 2-aza-3-phospha-1,5-hexadiene derivatives. Chem. Lett. 1988,577-580. 

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