tert-Butyldimethylsilyl trifluoromethanesulphonate → Benzyl 4-azido-3-(tert-butyldimethylsilyloxy)azepane-1-carboxylate

HRID 1038833Notes

Reaction equation

[Si:1]([O:8]S(C(F)(F)F)(=O)=O)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[N:16]([CH:19]1[CH2:25][CH2:24][CH2:23][N:22]([C:26]([O:28][CH2:29][C:30]2[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=2)=[O:27])[CH2:21][CH:20]1O)=[N+:17]=[N-:18]>C(Cl)Cl>[N:16]([CH:19]1[CH2:25][CH2:24][CH2:23][N:22]([C:26]([O:28][CH2:29][C:30]2[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=2)=[O:27])[CH2:21][CH:20]1[O:8][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])=[N+:17]=[N-:18]

Participants

Conditions

Temperature: 25 °C

Procedure

TBDMSOTf (0.010 g, 0.038 mmol) was added drop-wise to the mixture of benzyl 4-azido-3-hydroxyazepane-1-carboxylate (0.010 g, 0.034 mmol, WO 2010/114971, Example 90.5) and TEA (0.0096 mL, 0.069 mmol) in DCM (50 mL). The mixture was stirred at about 25° C. for about 3 h. The mixture was concentrated under reduced pressure and the residue was purified by Prep-TLC (EtOAc/pet ether ¼) to give benzyl 4-azido-3-(tert-butyldimethylsilyloxy)azepane-1-carboxylate (0.005 g, 36%). The material was used without characterization.

Workup

concentrationThe mixture was concentrated under reduced pressure
customthe residue was purified by Prep-TLC (EtOAc/pet ether ¼)

Sources & evidence

ORD record: ord-cd727809f23147a6b3238369afe0f150
Source dataset: uspto-grants-2013_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08551981B2

Reaction notes

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