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CAS No. : | 6240-11-5 | MDL No. : | MFCD00074756 |
Formula : | C12H20O | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | ZBIDZPHRNBZTLT-UHFFFAOYSA-N |
M.W : | 180.29 | Pubchem ID : | 110810 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With sulfuric acid; hydrogen bromide; In water; for 6h;Reflux; Cooling with ice; | In a 1 L round bottom flask equipped with a reflux condenser, 126.20 g (0.70 mol) of 2- (1-adamantyl) ethanol was added while 164 g of concentrated sulfuric acid and 200 g (48% aqueous solution) of hydrobromic acid were cooled in an ice bath, . The mixture was refluxed for 6 hours, cooled to room temperature and then added to 400 g of ice. The aqueous phase was extracted with 400 ml of pentane. The organic phase was washed with 2 M NaOH solution and water, dried over magnesium sulfate and the solvent was removed in vacuo. The product was distilled in vacuo to give 153.2 g (90%) of (1- (2-bromo-ethyl) -adamantane as a colorless oil. |
Halide 24: 2-(1-Adamantyl)ethyl bromide Using the procedure described in Can. J. Chem., 46, 86, (1968), this bromide was obtained from 2-(1-adamantyl)ethanol (Aldrich) by the conversion of the hydroxyl group to the bromide by carbon tetrabromide with the presence of triphenylphosphine. | ||
Halide 24: 2-(1 -Adamantyl)ethyl bromide Using the procedure described in Can. J. Chem., 46, 86 (1968), this bromide was obtained from 2-(1-adamantyl)ethanol (Aldrich) by the conversion of the hydroxyl group to the bromide by CBr4 and triphenylphosphine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | With Dess-Martin periodane; In dichloromethane; at 20℃; for 4h; | Example 6 <n="97"/>Synthesis of Compound 902To a solution of compound 901 (2.00 g, 11.1 mmol) in dichloromethane (30 niL) was added Dess-Martin periodinane (5.59 g, 153 mmol), and the mixture was stirred at room temperature for 4 hrs. After completion of the reaction, the reaction mixture was diluted with DCM, washed with water followed by brine and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure to afford compound 902 (1.8 g, 91%). 1H NMR (200 MHz, CDCl3): delta 9.6 (s, IH), 2.57 (s, 2H), 1.6-2.0 (m, 15H). |
90% | With sodium hypochlorite; 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; potassium bromide; In dichloromethane; water; for 0.333333h;pH 8.6;Cooling with ice; | General procedure: (1-Adamantyl)methanol (3.0 g, 18 mmol), KBr (214 mg, 1.8 mmol) and TEMPO (28 mg, 0.18 mmol)2 were dissolved in DCM (50 mL). The solution was cooled in an icebath. A commercial 5 % bleach-solution (30 mL) was buffered to pH 8.6 using solid NaHCO3 and then added to the TEMPOsolution. After 20 min of rapid stirring, the layers were separated. The DCM layer was dried over Na2SO4, filtered and concentrated in vacuo. This affords the product as a white to light-orange solid (2.25 g, 74%) |
79% | With Dess-Martin periodane; In dichloromethane; at 0 - 20℃; | 1-Adamantaneethanol (1.0 gram, 5.6 mmol, Sigma, 188115) was dissolved in DCM (15 mL). To the solution was added Dess-Martin periodinane (5.0 mL) at 0 C. After being stirred overnight at room temperature, the mixture was purified by ISCO to afford intermediate 6 (780 mg, 79%). 1H NMR (600 MHz, CDCb) delta 9.86 (t, J= 3.2 Hz, 1H), 2.12 (d, J = 3.2 Hz, 2H), 1.98 (brs, 3H), 1.67 - 1.64 (m, 12H). Intermediate 3 (100 mg, 0.16 mmol) and intermediate 6 (35 mg, 0.20 mmol) were dissolved in DCM (3.0 mL), and methanol (3.0 mL). To the solution was added sodium triacetoxyborohydride (55 mg, 0.26 mmol) at 0 C. After being stirred overnight at room temperature, the mixture was filtered and purified by preparative HPLC to afford AM16-91 A as yellow solid in TFA salt form (99 mg, 80%). 1H NMR (600 MHz, CD3OD) delta 8.53 (brs, 1H), 8.37 (s, 1H), 8.12 - 8.02 (m, 1H), 7.93 (s, 1H), 7.76 (s, 1H), 7.03 (d, J= 8.7 Hz, 1H), 6.14 (s, 1H), 5.11 - 5.03 (m, 1H), 4.57 (s, 2H), 4.49 (brs, 2H), 3.69 (brs, 2H), 3.34 - 3.03 (m, 6H), 2.42 (s, 3H), 2.24 (s, 3H), 1.96 (brs, 3H), 1.79 - 1.73 (m, 3H), 1.70 - 1.65 (m, 3H), 1.59 - 1.54 (m, 14H). |
64% | In ethyl acetate; at 45℃; for 10h;Inert atmosphere; Irradiation; | General procedure: To a three-necked, cylindrical Pyrex glass reaction vessel equipped with a rubber balloon, rubberseptum, and glass stopper, a N2 atmosphere was introduced by flowing via cannula for 5 min. Au(0.6 wt %)/TiO2 (117.3 mg, 0.17 mol % Au), 1a (271.5 mg, 1.99 mmol), and dehydrated ethylacetate (25 mL) were added successively to the vessel. After N2 gas was reintroduced more than 5min, the rubber balloon was connected to the vessel and the mixture was sonicated. The vessel wasimmersed in a oil bath (kept at 45 oC) and stirred for 10 h under irradiation (lambda = 300-470 nm). 1HNMR analysis of this crude mixture using mesitylene as an internal standard indicated 97%conversion of 1a and the formation of 2a in 86% yield, as determined based on the signals at delta 3.61ppm and 2.94 ppm (shifted from 2.89 ppm due to the presence of ethyl acetate), respectively. Theproduct was purified by silica gel column chromatography (n-hexane/ethyl acetate 3:1) to afford 2a(180 mg, 66% yield, with inclusion of small amounts of unidentified impurities). |
With 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; [bis(acetoxy)iodo]benzene; In dichloromethane; for 1h; | Adamantyl acetaldehyde: To a flask containing 2-adamantyl-1-ethanol (5 g, 27.7 mmol) in CH2Cl2 (28 mL) was added TEMPO (433 mg, 2.77 mmol) followed by iodobenzene diacetate (9.8 g, 30.5 mmol). The reaction was stirred 1 hour and then diluted with CH2Cl2 (100 mL). Saturated aqueous solution of Na2S2O3 (100 mL) was added and extracted with CH2Cl2 (3×50 mL). The combined organics were washed with saturated aqueous NaHCO3 (150 mL) and brine (150 mL), dried over Na2SO4, and concentrated in vacuo. The resulting residue was purified by silica gel chromatography (5% Et2O/pentanes) to provide the title compound, which was identical to the reported literature compound (see Luly et al. (1987) J. Org. Chem. 52: 1487). | |
General Procedure: To a dry 25 ml 3-neck round bottom flask equipped with magnetic stirring bar, thermometer, Ar inlet, and dropping funnel was added dry dimethyl sulfoxide (4 mmol, 0.32g, 0.29 ml) diluted with dry DCM ((3 ml), and the solution was cooled bellow -60 C in dry ice-acetone bath. Then trifluoroacetic anhydride (3 mmol, 0.63 g, 0.42 ml), in 2 ml of dry DCM was added. After 10 min of efficient stirring 1-adamantane methanol (2 mmol, 0.33 g) in 2 ml of dry DCM was added dropwise. The rate of addition of alcohol was controlled to keep temperature bellow -60 C. Mixture was stirred for 20 min at -65 C, then ice bath was removed and mixture was allowed to warm up to room temperature. Next, triethylamine (0.8 ml) was added in portions during 10 minutes, and mixture was stirred for another 10 minutes. The reaction mixture was poured into separatory funnel and washed with diluted HCl, then with water, and combined aqueous fractions were extracted once with DCM. Organic fractions were combined, dried over sodium sulfate, and solvent was evaporated. Residue was dried in vacuum giving yellow solid (0.052 g). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
96% | A solution of 1-adamantylethanol (3 g, 16.64 mmol) in methylen chloride (50 mL) and triethylamine (2.8 mL, 19.95 mmol) was stirred for 10 minutes. Then methanesulfonyl chloride (1.55 mL, 20.03 mmol) was added and the resulting reaction mixture was stirred at room temperature for 72 hours. The crude was partitioned between methylen chloride and a solution of sodium hydrogen carbonate (4%). The organic layer was washed with water and brine and the solvent was removed under reduced pressure to give the title compound as a yellow oil (4.1 g, 96%), which was used in the next step without further purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With triethylamine; In dichloromethane; at 0 - 20℃; | To a solution of 1-adamantaneethanol (3.06 g, 16.9 mmol) and triethylamine (2.8 mL, 20.1 mmol) in methylen chloride (30 mL) was added at O0C a suspension of 4- methylbenzene-1-sulfonyl chloride (3.88 g, 20.3 mmol) in methylen chloride (40 mL). The reaction mixture was stirred at room temperature overnight. Then, ice and a solution of ammonia 50% in water were added into the reaction mixture. The mixture was extracted with pentane and the organic layer was washed with water and brine. The solvent was removed under reduced pressure and the title compound was obtained as an oil (5.4 g, 90%). MS (M+): 335. |
89.4% | With pyridine; at 20℃; | 1-Adamantaneethanol (4.80 g, 26.6 mmol) was dissolved in 25 mL of pyridine, cooled to 0 C on ice bath and p-toluenesulfonyl chloride (8.37 g, 43.9 mmol) was added to the solution. The reaction mixture was allowed to warm and stirred overnight at room temperature. The solvent was evaporated under reduced pressure and the product was redissolved in 100 mL of EtOAc. The organic layer was washed once with saturated NaHCO3 and twice with brine, dried over Na2SO4, filtered and evaporated under reduced pressure. The subsequent filtration through a silica pad (40 g, EtOAc/n-heptane = 1/25) yielded the final product as a white solid. |
Under ice bath, 7.0 g (37 mmol) of p-toluenesulfonyl chloride and 5.0 mL (37 mmol) of triethylamine were added to 40 mL of dichloromethane solution.After 10 min, 4.15 g (23 mmol) of adamantane ethanol was slowly added to the mixture.The temperature was controlled to not exceed 8 C. After 5 h of reaction, TLC was detected (petroleum ether: ethyl acetate = 25:1) until the reaction was completed, and 10 mL of dichloromethane was added.The reaction solution was poured into ice water (10 mL × 2), and the reaction was stirred for 15 min.Wash with 10% hydrochloric acid solution, saturated sodium bicarbonate, and saturated brine.The organic phase is dried over anhydrous sodium sulfate, filtered, and the filtrate is evaporated under reduced pressure.The residue is passed through a silica gel column.Compound adamantyl ethyl p-toluenesulfonate(J13),For the preparation of 13j.1.7 g (4.5 mmol) of 10 and 2.1 g (6.8 mmol) of cesium carbonate were added to 9 mL of N,N-dimethylformamide under an oil bath of 55 C for 13 min.1.97 g (5.9 mmol) of (J13) was added in an oil bath at 60 C.The reaction was stirred for 15 h, then brine was added and ethyl acetate was evaporated.The organic layer was dried over anhydrous sodium sulfate, filtered, and evaporated.The residue was subjected to silica gel column chromatography (dichloromethane:methanol = 20:1)2.34g of colorless viscous solid 13j, yield 73.2%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
42% | With lithium aluminium tetrahydride; In tetrahydrofuran; at 0 - 25℃; for 3h; | To a suspension of LiAlH4 (39 mg, 1.03 mmol) in dry THF (3.0 mL) cooled at 0 C, a solution of 2-(adamantan-1-yl)acetic acid (200 mg, 1.03 mmol) in dry THF (3.0 mL) was added. The reactionmixture was stirred for 3 hours at 25 C then water was added dropwise at 0 C and the resultingmixture was extracted with diethyl ether (2 x 10 mL). The organic layers were extracted and driedover anhydrous Na2SO4, filtered and evaporated to afford the title compound 14j as an amorphouswhite solid (42% yield). 1H NMR (300 MHz, CDCl3): delta 3.75 (t, 2H, J = 6.0 Hz), 1.98 (s, 2H), 1.82 - 1.56(m, 12H), 1.38 (t, 2H, J = 6.4 Hz). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
76% | Example 1-11 Synthesis of Monomer 11 By following the same procedures as in Examples 1-1-1 to 1-1-3 aside from using 2-adamantylethanol instead of 2-adamantanol, 1-[(2-adamantyl)ethoxy]-2-methylpropyl methacrylate was produced (four step yield 76%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
53% | With di-isopropyl azodicarboxylate; triphenylphosphine; In 1,4-dioxane; at 20 - 45℃; | 4-[2-(Adamantan-1-yl)ethoxy]benzophenone. In a round-bottom flask equipped with magnetic stirrer, room temperature water bath and dropping funnel 4-hydroxybenzophenone (1.98 g, 10 mmol), 1-adamantaneethanol (1.98 g, 11 mmol) and triphenylphosphine (3.15 g, 12 mmol) were dissolved in dry dioxane (50 mL). DIAD (2.46 ml, 12.5 mmol) was added dropwise within 20 min with stirring. The reaction mixture was heated to 40-45C until starting benzophenone is consumed according to TLC (CHCl3-MeOH 9:1), then cooled to room temperature; the precipitate formed was filtered off, washed successively with cold dioxane and MeOH and dried in vacuo. The solid was purified by column chromatography on silica gel (eluation with benzene). The appropriate fractions were combined and evaporated. The residue was triturated in petroleum ether to give the desired product (1.91 g, 53%), colorless crystals, mp 96C. Rf 0.17 (toluene), 0.57 (toluene-EtOAc, 9:1), 0.64 (toluene-EtOAc, 4:1). NMR (DMSO-d6): 7.74 (d, 2H, J = 8.7 Hz, ArH); 7.70-7.62 (m, 3H, ArH); 7.55 (m, 2H, ArH); 7.07 (d, 2H, J= 8.7 Hz, ArH); 4.14 (t, 2H, J= 7.2 Hz, OCH2); 1.93 (br. s, 3H, H-3,5,7 (adamantane)); 1.70-1.60 (m, 6H, H-4,6,10 (adamantane)); 1.58-1.50 (m, 8H, H-2,8,9 (adamantane), OCH2CH2). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine; In dichloromethane; acetonitrile; | A. A mixture of <strong>[6240-11-5]2-(adamant-1-yl)ethanol</strong> (2.1 g, 12 mmoles), disuccinimidyl carbonate (3.3 g, 13 mmoles) and pyridine (0.86 ml, 10 mmoles) in acetonitrile (50 ml) was stirred at room temperature for 24 hours, then the solvent was evaporated off in the cold and the residue was dissolved in methylene chloride (100 ml). The solution was washed with water (50 ml), 1N HCl (50 ml) and water again (50 ml). The organic phase was dried over anhydrous sodium sulfate and the solvent was evaporated off to give 3 g (9 mmoles) of crude 2-(adamant-1-yl)ethyl-succinimidyl carbonate which was redissolved in THF (30 ml). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
47% | In diethyl ether; water; | Referential Example 11 Production of 2-adamantyl ethanol: 2-adamantyl acetic acid methyl ester 0.57 g (2.47 mill) was added to diethyl ether 20 ml solution of lithium aluminum hydride 0.16 g (4.2 mkf), and the reaction mixture was refluxed under heating for 2 hours. The reaction mixture was cooled and added water. Insoluble material was filtered and the filtrate was extracted with ether, then dried by anhydrous sodium sulfate, which was thereafter removed by filtration. The filtrate was concentrated in vacuo to obtain the product. Yield: 0.23 g (Yield 47%) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine; In diethyl ether; | a. 4-Nitrophenyl 2-[tricyclo(3.3.1.13,7)dec-1-yl]ethyl carbonate To a solution of p-nitrophenyl chloroformate (1.17 g, 5.82 mmol) in Et2 O (25 ml) at 0 C. was added pyridine (5 ml) followed by addition of 2-(1-adamant-yl)ethanol (1.00 g, 5.54 mmol) in Et2 O (20 ml) dropwise over 1 hr. The resulting mixture was stirred at room temperature for 12 hr. and partitioned between H2 O and Et2 O. The ethereal layer was washed with 5% aqueous HCl, pH 7.0 phosphate buffer, dried over MgSO4, filtered and the solvents removed under vacuum. The crude product was purified by flash chromatography on silica gel eluding with EtOAc:hexane (5:95) to give the product (1.10 g) as a white powder; TLC, Rf =0.29, silica gel, EtOAc:hexane (5:95). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
46% | (a) 2-[2-(1-Adamantyl)ethyloxy]ethylamine The desired intermediate was obtained, according to the procedure of Example 11, starting from 1-(2-hydroxyethyl)adamantane. Yield: 46%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydrogen bromide; In water; | (a) Preparation of 1-(Adamantan-1-yl)-2-bromoethane A mixture of hydrobromic acid (26.2 g, 48%), concentrated sulphuric acid (10.82 g), and 2-(adamantan-1-yl)ethanol (10.82 g, 0.06 mol) was stirred and heated under reflux for 6 h. After cooling, water (60 ml) was added to the reaction mixture and the mixture was shaken. The organic layer was separated, and was then extracted with ether (3*100 ml). The extracts were combined, washed with water (1*20 ml) and with sodium carbonate solution (20 ml, 10% w/v) and the ether solution was then dried (MgSO4). The ether solution was concentrated under reduced pressure to give a solid, which was recrystallized from aqueous ethanol, to afford 1-(adamantan-1-yl)-2-bromoethane as white plates, m.p. 71-72. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With trifluoromethanesulfonic acid anhydride; N-ethyl-N,N-diisopropylamine; In dichloromethane; | EXAMPLE 1 Methyl-1-(2-(1-adamantyl)ethyl)-5-diphenylacetyl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-6-carboxylate. A solution of 11.8 mL trifluoromethanesulfonic anhydride in 70 mL dichloromethane is chilled to -70 C. and treated dropwise with a solution composed of 12.6 g 1-adamantyl-2-hydroxyethane, 12.2 mL diisopropylethylamine and 70 mL dichloromethane. The solution is allowed to warm to -55 C. over 45 min then a solution of 25 g N,1-bis-BOC-histidine methyl ester (J. Chem. Soc., Perkin Trans. I 1982; 1553-61.) in 70 mL dichloromethane is added dropwise. The reaction is then stirred at 25 C. for 24 hr and poured into pH=7, 0.25M potassium phosphate buffer (500 mL), stirring vigorously. The organic layer is separated, washed with the same buffer, dried and concentrated. 3-(2-(1-Adamantyl)ethyl)-N-BOC-histidine methyl ester is isolated by chromatography on silica gel (chloroform-methanol, 99:1) as a gum. NMR (CDCl3) 3.85 (m,2H,NCH2). | |
With trifluoromethanesulfonic acid anhydride; N-ethyl-N,N-diisopropylamine; In dichloromethane; | EXAMPLE 1. A solution of 11.8 mL trifluoromethanesulfonic anhydride in 70 mL dichloromethane is chilled to -70C and treated dropwise with a solution composed of 12.6 g 1-adamantyl-2-hydroxyethane, 12.2 mL diisopropylethylamine and 70 mL dichloromethane. The solution is allowed to warm to -55C over 45 min then a solution of 25 g N,1-bis-BOC-histidine methyl ester (J. Chem. Soc., Perkin Trans. I 1982; 1553-61.) in 70 mL dichloromethane is added dropwise. The reaction is then stirred at 25C for 24 hr and poured into pH=7, 0.25 M potassium phosphate buffer (500 mL), stirring vigorously. The organic layer is separated, washed with the same buffer, dried and concentrated. 3-(2-(1-Adamantyl)ethyl)-N-BOC-histidine methyl ester is isolated by chromatography on silica gel (chloroform-methanol, 99:1) as a gum. NMR (CDCl3) 3.85 (m,2H,NCH2). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With toluene-4-sulfonic acid; In benzene; | EXAMPLE 19 1-Adamantaneethanol (10 g, 0.05 mol), 4-hydroxyphenylacetic acid (8.43 g, 0.05 mol) and p-toluenesulfonic acid (1 g, 0.006 mol) were refluxed in benzene (100 mL) with continuous water separation for 8 hours, then allowed to stir overnight. The residue was washed, first with 5% aqueous sodium bicarbonate solution (50 mL) and then twice with water (50 mL), then was dried over anhydrous MgSO4 and filtered. The filtrate was concentrated in vacuo. The product, (adamant-1-yl)ethyl 4-hydroxyphenylacetate, was taken up in epichlorohydrin (50 mL) and refluxed for 2 hours in the presence of DBU (1 mL, 0.007 mol). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
at 20℃; | 1- Adamantane ethanol (4.758 g, 26.4 mmol, Aldrich, Milwaukee, WI) was added, and the sealed mixture was stirred overnight at room temperature. It was then poured into 10% NaHCO3 solution (50 mL) and the pyridine was evaporated under vacuum. The slightly yellow solid was dissolved in 1 L of water and extracted with ether (three 150 mL portions). The aqueous phase was acidified with 2 N HCl to pH 1, and then extracted with three 150 mL portions of CHCl3 :H-BUOH (7:3). The combined organic layer (ether and CHCl3 :w-BuOH) was washed with water and a slightly yellow precipitate was formed in the mixed solvents, at which point the solvents were evaporated under vacuum. A slightly yellow solid was formed and was recrystallized from acetone/hexane. The solid was dried under vacuum, yield 60 % |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
22% | With triphenylphosphine; diethylazodicarboxylate; In tetrahydrofuran; at 80℃; for 48h; | To a solution of Intermediate 15 (1 g, 4.3 mmol) in tetrahydrofuran (6 ml_) and 1- Adamantaneethanol (0.77 g, 4.2 mmol) in tetrahydrofuran (6 ml_) was added a solution of diethyl azodicarboxylate (2.9 mL, 6.4 mmol) and triphenylphosphine (1.6 g, 6.4 mmol) in tetrahydrofuran (4 mL). The reaction mixture was stirred at 8O0C for 48 hours. The solvent was removed under reduced pressure and partitioned between methylen chloride and water. The organic layer was washed with water, sodium hydrogen carbonate (4%) and brine. The solvent was removed under reduced pressure and the crude was purified by column chromatography with silica gel, eluting with hexane/ethyl acetate (30:1). The title compound was obtained as a solid (0.39 g, 22%). MS (M+): 414. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
25% | A mixture of 2-(l-adamantyl)ethanol (0.35 g, 1.9 mmol) and CDI (0.63 g, 3.9 mmol) in THF(15 mL) was stirred at room temperature for 2 hours. Methyl (2£)-3-[4- (aminomethyl)phenyl]acrylate.HCl (0.44 g, 1.9 mmol), DBU (0.3 mL, 1.9 mmol) andDIPEA (0.33 mL, 1.9 mmol) were added and stirred at room temperature for overnight.Reaction mixture was diluted with water (100 mL) and extracted with EtOAc (2x100 mL). Collective EtOAc layer was dried over anhydrous Na2SO4. Concentrated and dried to afford the pure title compound (0.2 g, 25% yield). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
153.2 g (90%) | With hydrogen bromide; In sulfuric acid; water; | 1-(2-Bromo-ethyl)-adamantine In a 1 l-roundbottom flask equipped with a reflux condenser 164 g concentrated sulphuric acid and 200 g hydrobromic acid (48% in water) were added subsequently under cooling with an ice bath to 126.20 g (0.70 mole) 2-(1-adamantyl)ethanol. The mixture was refluxed for 6 h and after cooling to room temperature given to 400 g of ice. The aqueous phase was extracted with 400 ml pentane. The organic layer was washed with a 2 M NaOH-solution and with water, dried over magnesium sulphate, and the solvent was removed in vacuo. The product was distilled in vacuo to yield 153.2 g (90%) of (1-(2-Bromo-ethyl)-adamantane as a colourless oil. 1H-NMR (400 MHz, CDCl3): delta=3.29 (t, 2H, CH2Br), 1.71 (t, 2H, CCH2CH2Br), 1.56-1.17 (m, 15H, aliphatic) ppm. |
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