Bismuth -nitrate.pentahydrate

The possibility that the reaction is catalyzed by nitric acid released from bismuth nitrate pentahydrate in CH3CN was considered. A suspension of bismuth nitrate in water as well as CH3CN is acidic (pH = 2). However, the reaction of benzalde-hyde with acetic anhydride using 0.6 equivalents of HN03 did not afford the desired acylal in good yield. Even when the amount of HN03 was increased to... 

Eash KJ, Pulia MS, Wieland LC, Mohan RS (2000) A simple chemoselective method for the deprotection of acetals and ketals using bismuth nitrate pentahydrate. J Org Chem 65 8399-8401... 

Bismuth is stable to both dry and moist air at ordinary temperatures. At elevated temperatures, the vapors of the metal combine rapidly with oxygen, forming bismuth trioxide, Bi203. The element dissolves in concentrated nitric acid forming bismuth nitrate pentahydrate, Bi(N03)3 5H20. Addition of water to this salt solution precipitates an oxysalt, Bi203N205 2H20. Reaction with hydrochloric acid followed by evaporation of the solution produces bismuth trichloride, BiCB. 

Bismuth nitrate (0-2m). To 500 ml water add cautiously 50 ml concentrated nitric acid, HN03. Dissolve 97 0 g bismuth nitrate pentahydrate, Bi(N03)3. 5HzO, in this mixture, and dilute with water to 1 litre. 

A general approach to dithiabismuth(m) heterocycles 10-12 involved a high-yield metathesis reaction of bismuth chloride or bismuth nitrate pentahydrate with the dithiol at appropriate stoichiometry (1 1 or 3 2) in ethanol. 

BiHl0N3O14 bismuth nitrate pentahydrate 10035-06-0 25.00 2.8300 1 767 Ca207P2 calcium pyrophosphate 7790-76-3 25.00 3.0900 1... 

Pyridines. Hantzsch 1,4-dihydropyridines undergo dehydrogenation on exposure to bismuth nitrate pentahydrate in HOAc at room temperature (7 examples, 50-90%). 

Bismuth nitrate pentahydrate (Bi(N03)3-5H20) is found as lustrous hygroscopic crystals and smells like nitric acid. It is readily decomposed by water to subnitrate BiO(N03), but dissolves without decomposition in water containing nitric acid. It is soluble in organic solvents such as acetone, acetic acid and glycerol, but practically insoluble in ethanol and ethyl acetate. By heating above 590°C, it is converted to bismuth oxide. Bismuth subnitrate is a white, odorless and tasteless powder of non-stoichiometric composition its properties and composition vary considerably depending on... 

To a hot aqueous solution of L-malic acid (1.34 g, 10.0 mmol) was added slowly bismuth nitrate pentahydrate (4.85 g, 10.0 mmol). The homogeneous reaction mixture gradually turned into a suspension. The mixture was stirred for 15 min at 60°C and the insoluble materials were removed by filtration. The clear filtrate was kept hot in a Dewar bath for crystallization. During the course of 4 weeks, colorless cubic crystals deposited gradually. These were separated, washed with acetone and dried [93CB51]. 

To a solution of S,S-acetal (0.5 mmol) in dry benzene or dichloromethane (10 ml) was added finely powdered bismuth nitrate pentahydrate (2-20 mol%) followed by water (1 mmol). When needed, bismuth chloride (5 mol%) was also added. The mixture was magnetically stirred in a stoppered flask for an appropriate time at ambient temperature, while the progress of the reaction was intermittently monitored by GLC. The stopper was loosened at intervals in order to admit fresh air into the reaction vessel. After the reaction, the mixture was worked up as usual to give the parent carbonyl compound in 65-98% yields [96CC1847]. 

Keywords bismuth nitrate pentahydrate, iodine, co-grinding Experimental procedures ... 

Bismuth nitrate pentahydrate Bi(N03)3-5Hj0 -159 Cesium superoxide CsO, +1534... 

The ability of bismuth(III) nitrate pentahydrate as effective catalyst in the Biginelli reaction was reported, while the oxidative property of this salt has been also investigated. By combining both of these characteristics, the authors developed a convenient alternative method for the Biginelli reaction. The direct synthesis of 3,4-dihydropyrimidin-2(lH)-ones by three-component condensation in one pot, using benzyl halides in place of aldehydes in the presence of bismuth nitrate pentahydrate in tetrabutylammonium fluoride (TBAF), afforded the products in good to excellent yields. Some chemoselectivity was observed, the aliphatic halides gave less than 30% of the respective dihydropyrimidinones under the present reaction conditions (Equation 12) [33a]. 

A.K. Bhattacharya, T. Kaur, An efficient one-pot s)mthesis of alpha-amino phosphonates catalyzed by bismuth nitrate pentahydrate, Synlett 5 (2007) 745-748. 

Bandyopadhyay et al. [50] synthesized a series of novel N-substituted pyrrole derivatives. The autiiors sought a simple and solvent-free ultrasound-assisted reaction for tiie synthesis of N-substituted pyrroles (12) by reacting 2,5-dime-thoxytetrahydrofuran (10) with aromatic, aliphatic, polyaromatic, and heteropolyaromatic amines (11) using bismuth nitrate pentahydrate as catalyst (Scheme 4). It should be mentioned that the addition of the bismuth salt, which is environmentally benign and nontoxic, increased tiie reaction yield from 55% to 99% and reduced the reaction time from 5h to 5 min. 5-(lH-Pyrrol-l-yl)-l,10-phenantiiroline and l-(phenanthren-2-yl)-lH-pyrrole have demonstrated cytotoxic specificity against liver cancer cell lines in vitro when compared with normal cultured primary hepatocytes. 

Bismuth nitrate pentahydrate induced nitration of eugenol has been investigated by Canales et al. (2011) in detail. They have studied 20 five different conditions and found that microwave induced solvent-free reaction was the best. 5-Nitroeugenol was the sole product in all the cases and no oxidized or isomerized products were detected. 

KBil solution Dissolve 1.7g basic bismuth nitrate or bismuth nitrate pentahydrate in 20 mL glacial acetic acid and 80 mL distilled water. Mix with a solution of 65 g potassium iodide in 200 mL H2O, add 200 mL acetic acid, and dilute to 1 L with water. 

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