Hydrochloric Acid → HCID 66960940, compound

Compound S2 (tricyclo[4.3.1.13,8]undecan-1-aminium chloride) was synthesized from Tricyclo[4.3.1.1˜3,8˜]undecane-1-carboxylic acid (Matrix Scientific Cat. No. #037551) using curtius rearrangement according to the procedure described in previous report. (Nasr, K., Pannier, N., Frangioni, J. V. & Maison, W. Rigid multivalent scaffolds based on adamantane. J. Org. Chem. 73, 1056-1060 (2008). Diphenylphosphorylazide (DPPA) (1.29 ml, 6 mmol) and triethylamine (0.84 ml, 6 mmol) were added to a solution of Tricyclo[4.3.1.1˜3,8˜]undecane-1-carboxylic acid (0.97 g, 5 mmol) in 10 ml CH2Cl2 at ambient temperature. The reaction was stirred for 2 hours. An additional 10 ml CH2Cl2 and 10 ml H2O were added to the reaction mixture, the organic layer was separated and washed sequentially with H2O, saturated NaHCO3 and brine and dried over MgSO4. Solvent was removed by rotary evaporation and t-BuOH (50 ml) was added. The solution was heated to reflux under N2 atmosphere for 5 hours. Excess t-BuOH was removed in vacuo and the residue was treated with 50% TFA/CH2Cl2 at ambient temperature for 2 hours. N2 was purged through the mixture to remove excess TFA and CH2Cl2 to give yellow oil. 4M HCl in dioxane (3 ml) was added and the mixture was added dropwise to cold diethyl ether. A white solid was collected by centrifugation and subsequent decanting of the ether supernatant. Further flash column chromatography purification gave tricyclo[4.3.1.13,8]undecan-1-aminium chloride (compound S2) as a white solid (0.76 g, Yield: 75%). 1H-NMR (360 MHz, CD3OD) δ 2.28-2.24 (m, 3H), 1.96-1.93 (m, 4H), 1.90-1.87 (m, 4H), 1.82-1.72 (m, 4H), 1.55-1.52 (m, 2H); 13C-NMR (90 MHz, CD3OD) δ 53.91, 43.16, 42.46, 40.72, 38.18, 37.36, 35.87, 33.76, 32.54, 30.98, 28.38; ESI-MS: Calculated for C11H19N (M+H)+ 166.3. Found: 166.3.

1. customthe organic layer was separated
2. washwashed sequentially with H2O, saturated NaHCO3 and brine
3. dry with materialdried over MgSO4
4. customSolvent was removed by rotary evaporation and t-BuOH (50 ml)
5. additionwas added
6. temperatureThe solution was heated
7. temperatureto reflux under N2 atmosphere for 5 hours
8. customExcess t-BuOH was removed in vacuo
9. additionthe residue was treated with 50% TFA/CH2Cl2 at ambient temperature for 2 hours
10. customN2 was purged through the mixture
11. customto remove excess TFA and CH2Cl2
12. customto give yellow oil
13. customA white solid was collected by centrifugation
14. customsubsequent decanting of the ether supernatant
15. customFurther flash column chromatography purification

ORD record

ord-0a7b25b44763425e9eb6dd6521348812

Source dataset

uspto-grants-2016_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09301950B2