1,8-Diazabicyclo(5.4.0)undec-7-ene → (1R)-1-azido-5-t-butyldiphenylsilyloxy-1,2,3,4-tetrahydronaphthalene

HRID 1741362Notes

Reaction equation

O[C@@H:2]1[C:11]2[C:6](=[C:7]([O:12][Si:13]([C:26]([CH3:29])([CH3:28])[CH3:27])([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[CH:8]=[CH:9][CH:10]=2)[CH2:5][CH2:4][CH2:3]1.P([N:46]=[N+:47]=[N-:48])(=O)(OC1C=CC=CC=1)OC1C=CC=CC=1.C1CCN2C(=NCCC2)CC1>C1(C)C=CC=CC=1>[N:46]([C@H:2]1[C:11]2[C:6](=[C:7]([O:12][Si:13]([C:26]([CH3:29])([CH3:28])[CH3:27])([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[CH:8]=[CH:9][CH:10]=2)[CH2:5][CH2:4][CH2:3]1)=[N+:47]=[N-:48]

Participants

Conditions

Temperature: 0 °C

Procedure

A mixture of (1S)-1-hydroxy-5-t-butyldiphenylsilyloxy-1,2,3,4-tetrahydronaphthalene (1.0 g) and diphenyl phosphorazidate (0.65 ml) was dissolved in toluene (10 ml). The mixture was cooled to 0° C. under N2, and neat 1,8-diazabicyclo[5.4.0]-7-undecene (DBU) (0.45 ml) was added. The reaction mixture was stirred for 2 hours at 0° C. then at 20° C. for 16 hours. The resulting mixture was washed with water and 1N-HCl. The organic layer was concentrated in vacuo and purified by silica gel chromatography to give (1R)-1-azido-5-t-butyldiphenylsilyloxy-1,2,3,4-tetrahydronaphthalene (950 mg). MS (m/z): (400 (M+ +() IR (Neat): 2100 cm-1NMR (CDCl3, δ): 1.10 (9H, s), 1.8-2.2 (4H, m), 2.6-3.1 (2H, m), 4.5-4.7 (1H, m), 6.3-6.4 (1H, m), 6.7-7.0 (2H, m), 7.1-7.8 (10H, m)

Workup

waitat 20° C. for 16 hours
washThe resulting mixture was washed with water and 1N-HCl
concentrationThe organic layer was concentrated in vacuo
custompurified by silica gel chromatography

Sources & evidence

ORD record: ord-fe94a9d3bbb74b829570a74a473e12b5
Source dataset: uspto-grants-1999_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05972965

Reaction notes

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