Ammonium formate → 2-(((1,1-Dimethylethyl)diphenylsilyl)oxy)-3-(((1,1-dimethylethyl)-diphenylsilyl)oxymethyl)-1-aminocyclobutane

2-(((1,1-dimethylethyl)diphenylsilyloxy)-3-(((1,1-dimethylethyl)diphenyl-silyl)oxymethyl)-1-azidocyclobutane (800 mg, 1.29 mmol), the product of Step M, was dissolved in 20 mL of methanol. To this solution was added 200 mg of 5% palladium on carbon, followed by 420 mg of ammonium formate. The flask was stoppered and the reaction mixture was stirred at ambient temperature for 23 h. The reaction mixture was filtered and the filtrate concentrated under reduced pressure. The residue was dissolved in 200 mL of diethyl ether and the ether solution was washed with 100 mL of 5% aqueous sodium bicarbonate solution, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to give 707 mg (92% yield) of the title compound; MS DCI-NH3M/Z: 594 (M+H)+ ; 1H NMR (CDCl3) δ 0.88-1.08 (m, 18H), 1.95-2.15 (m, 3H), 3.01 (q, 1H), 3.5 (m, 2H), 3.68 (t, 1H).

1. filtrationThe reaction mixture was filtered
2. concentrationthe filtrate concentrated under reduced pressure
3. dissolutionThe residue was dissolved in 200 mL of diethyl ether
4. washthe ether solution was washed with 100 mL of 5% aqueous sodium bicarbonate solution
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure

ORD record

ord-d7295c19f6b346c7b7c965bccf92eca4

Source dataset

uspto-grants-1993_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05246931