in gas byproducts: hexabutylditin; placing starting material in a porcelain cup in the sublimation chamber of a flash vac. thermolysis apparatus, react. at 800-850°C in the main oven and 250-300°C in the sublimation oven (10E-2 mm), oven packed with broken porcelain; vapors quenched on a dewar cold finger, pyrolysis tube cooled to room temp., product washed with ether from the dewar surface, ether evapd., chromy. (florisil);

React. of starting materials at -100°C.; Mixt. is allowed to warm to -78°C, and quenched at that temp. to give a mixt. of resulting compd. (total yield 98percent).;

copper(l) chloride; lithium bromide; tetrakis(triphenylphosphine) palladium(0) T=60°C; Stille coupling; 8 h;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; PhCH2Pd(PPh3)2Cl; carbon monoxide T=70°C; P=15514.4 Torr; 10 h;