N12CCCN=C1CCCCC2.[NH:12]1[C:20]2[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=2)[C:14]([C@@H:21]2[C:29]3[C:24](=[CH:25][CH:26]=[CH:27][CH:28]=3)[C@H:23](O)[CH2:22]2)=[CH:13]1.C1(P([N:45]=[N+:46]=[N-:47])(C2C=CC=CC=2)=O)C=CC=CC=1.O>C1COCC1>[N:45]([C@@H:23]1[C:24]2[C:29](=[CH:28][CH:27]=[CH:26][CH:25]=2)[C@@H:21]([C:14]2[C:15]3[C:20](=[CH:19][CH:18]=[CH:17][CH:16]=3)[NH:12][CH:13]=2)[CH2:22]1)=[N+:46]=[N-:47]1,8-Diazabicyclo[5.4.0]undec-7-ene (4.8 mL, 32.1 mmol, 1.45 equiv) was added to (1R,3S)-3-(1H-indol-3-yl)-indan-1-ol (22.2 mmol ) and diphenyl phosphoryl azide (6.0 mL, 27.8 mmol, 1.25 equiv) in 150 mL dry THF at 0° C. The reaction was stirred 0.5 hours at 0° C., then 2 hours at room temperature—TLC showed full conversion. The reaction mixture was poured into water and extracted with ethyl acetate. The organic phase was washed with 100 mL 0.5 N HCl, sat. NaHCO3, dried over MgSO4 and concentrated in vacuo to give the 3-((1S,3S)-3-azido-indan-1-yl)-1H-indole.
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