Tetraphenylbismuth chloride

In a similar manner tetraphenylbismuth chloride [42967-53-3], C24H2QBiCl, (162) and tetraphenylbismuthonium tetrafluoroborate [36682-02-7], C24H2qBB1F4, (163) are obtained from pentaphenjlbismuth and hydrogen chloride or hydrogen tetrafluoroborate, respectively. When triphenylboron is used, the tetraphenylborate is obtained (162) ... 

It can also be prepared by the reaction of phenyUithium with tetraphenylbismuth chloride or the /V-triphenylbismuth derivative of 4-toluenesulfonamide... 

An aqueous silver trichloroacetate was prepared by dissolving a calculated amount of silver oxide in an aqueous solution of trichloroacetic acid. One equivalent of tetraphenylbismuth chloride dissolved in cold acetone (0°C) was added to this solution with constant stirring. After stirring for 15 min, the precipitated silver chloride was filtered off and the filtrate was concentrated in vacuo until it became cloudy. Upon cooling the solution in a refrigerator, the trichloroacetate was obtained as fine needles [73JCS(D)1394]. 

Treatment of oestrone with tetraphenylbismuth monotrifluoroacetate gave oestrone phenyl ether and exemplified, in part, a new procedure for aryl ether formation.31 A detailed study was reported of the formation of benzyl ethers by sequential reaction of alcohols with chloro(phenylmethylene)dimethylammonium chloride and sodium hydrogen telluride.32 Steroidal alcohols, inter alia, were converted into hydrolytically stable silyl ethers by reaction with B N Sil or BulPh2I which were generated in situ from the selenosilane and iodine.33 The 5a-hydroxycholestane (21) was protected in this way. 

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