Condensation-silatropy method

The silyl migration method involves intramolecular 1,3-silyl migration which is useful for introducing phosphorus multiple bonds. Variations of this 1,3-silyl migration have been classified as the condensation-silatropy method and the addition-silatropy method (Scheme 3)8. Becker reported a reaction involving rearrangement of silyl-substituted acylphosphine for the first time in 1976 (equation 3)9. 

Compound 1 was also used in the preparation of various l-trimethylsilyl-2-trimethyl-silyloxy-l-phosphethenes and phosphaethynes by the condensation-silatropy method 18 and condensation-silatropy-elimination method , respectively (Scheme 4)19. 

Zurmtihlen and Regitz prepared silyloxyiminophosphine by the condensation-silatropy method in the reaction of the silylphosphide lib with nitrosyl chloride (equation 96)70. The condensation-silatropy method has also been utilized for the introduction of pln=pln bonds. Romanenko and coworkers prepared diphosphene via phosphaethene (equation 97), in a reaction where one of the trimethylsilyl groups migrated onto the carbon atom121. 

---

See also in sourсe #XX -- [ , , , ]

---