Ammonia → 3-Azabicyclo[3.2.1]octan-6-one ethylene ketal
Reaction equation
CS(O[CH2:6][CH:7]1[CH2:15][CH:14]([CH2:16]OS(C)(=O)=O)[CH2:13][C:8]21[O:12][CH2:11][CH2:10][O:9]2)(=O)=O.[NH3:22]>>[CH2:11]1[O:12][C:8]2([CH2:13][CH:14]3[CH2:15][CH:7]2[CH2:6][NH:22][CH2:16]3)[O:9][CH2:10]1Participants
3
Conditions
- Temperature
- 60 °C
Procedure
6,8-Bis(methanesulfonyloxymethyl)-1,4-dioxaspiro[4.4]nonane (14.90 g, 43.3 mmol) was suspended in aqueous ammonia (35%, 150 ml) and heated for 18 h at 60° C. The reaction was cooled to ambient temperature and concentrated by rotary evaporation. The residue was treated with saturated sodium chloride solution (50 ml) and extracted with chloroform (3×50 ml). The organic extracts were combined, dried over sodium sulfate, filtered and concentrated to yield a brown oil (7.69 g, 100%).