Bismuth triacetate

Bismuth salts, 4 25 Bismuth sesquisulfide, 4 24 Bismuth subcarbonate, 4 36 Bismuth subgallate, 4 36 Bismuth subhalides, 4 19 Bismuth subnitrate, 4 36 Bismuth subsalicylate, 4 1, 36 medical applications of, 22 11-12 Bismuth(III) sulfate, 4 25 Bismuth(III) sulfide, 4 24 Bismuth sulfides, 4 24-25 Bismuth thiolates, 4 25 Bismuth-tin alloy waterfowl shot, 4 15 Bismuth triacetate, 4 25 Bismuth tribromide, 4 21 physical properties of, 4 20t Bismuth trichloride, 4 19-20 physical properties of, 4 20t Bismuth trifluoride, 4 19 physical properties of, 4 20t Bismuth trihalides, 4 19 Bismuth triiodide, 4 21-22 physical properties of, 4 20t Bismuth trinitrate pentahydrate, 4 25 Bismuth trioxide, 4 23-24 physical properties of, 4 20t Bismuth triperchlorate pentahydrate, 4 25... 

Reaetiou mth amines and alcohob, Bismuth triacetate reacts with amines (equation 1) and with alcohols (equation 2) at 150° to give N- and 0-acetylatcd derivatives, respectively. Yields in both cases arc in the range 30-80%. The inorganic residue in both cases is bismuthyl acetate. 

Finne and Albertsson prepared four-arm star-shaped PLLA using novel spirocyclic tin initiators [77]. Kricheldorf et al. [78] polymerized LLA using bismuth triacetate and pentaerythritol as initiator and coinitiator, respectively. Kim et al. [79] and Arvanitoyannis et al. [80] used Sn(Oct)2 or tetraphenyl tin and pentaerythritol or glycerol, respectively, as the initiator and coinitiator system for LLA polymerization. Similar star-shaped polymers using multifunctional alcohols were reported by Korhonen et al. [81]. 

The a-arylation of ketones, such as cyclohexanone, can be achieved using different methods. A convenient route by Pinhey et al.89), reacts cyclohexanone-2-carboxylic esters with aryllead triacetates in pyridine. The protection of the P-carboxylic ester prevents a,a-di- or even higher arylations in a -positions. The ester group can be removed by basic hydrolysis and mild thermal decarboxylation or by heating in wet dimethylsulfoxide with sodium chloride (120-180 °C)90). Barton et al. 91) have found a similar a-arylation route using the less electrophilic triphenylbismuth carbonate. In both cases probably the lead- or bismuth-enolates, respectively, are the first inter-... 

Preparation. Bismuth oxide (50 g.) is heated at 140-150° with acetic acid (300 ml.) and acetic anhydride (35 ml.) until it dissolves (1.5 2 hr.). The triacetate separates on cooling as glistening, colorless tablets (yield 90%). 

---