Synthèse et réactivité d'un nouvel hydrure organostannique à “queue polaire”: le dibutyl-4,7,10-trioxaundécylstannane

Synthesis of Boron Substituted Stannacyclohexadienes by a Competitive Metathesis

“…Ethynyl magnesium bromide [11], 3-tosyloxypropyne and 1,4-pentadiyne [11], PhBBr 2 [12], and Bu 2 SnH 2 [13] were prepared according to published procedures. Argon, acetylene and nitrogen were purified by passage through a MnO oxygen-removal column and a Davison 4Ä molecular sieve column.…”

Recent Advances in the Chemistry of the Organotin Hydrides

“…38 The by-products from the fluorous hydride can be extracted from an organic solvent into a fluorous solvent, [39][40][41] and the hydrides with a polyethylene oxide tail give derivatives that can be washed out with water. 42,43 Tin hydride-cyclodextrin complexes can be used for carrying out reactions in water. 44 Polymer-supported tin hydrides provide an alternative solution to the problem of avoiding toxic residues.…”

Tin

“…With dibutyl(4,7,10trioxaundecyl)tin hydride (62) (Scheme 62), the organotin by-products are readily separated by chromatography on a silica column. 348 Tri(4,7-dioxaoctyl)tin hydride (63) (Scheme 63) is soluble enough in water (30 mM at room temperature) to be used in aqueous solution; it can be recovered by acidification o f the solution with H C 1 to give the chloride, which is extracted with chloroform. This principle has been used catalytically by attaching both organotin dichloride and benzo-15crown-5 pendant groups to the polystyrene (66).…”