Indole-4-carboxylic acid → tert-butyl 1-(1H-indol-4-yl)-1-oxo-5,8,11-trioxa-2-azatetradecan-14-oate

Reaction equation

[NH:1]1[C:9]2[CH:8]=[CH:7][CH:6]=[C:5]([C:10]([OH:12])=O)[C:4]=2[CH:3]=[CH:2]1.[NH2:13][CH2:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH2:20][CH2:21][O:22][CH2:23][CH2:24][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C>[NH:1]1[C:9]2[C:4](=[C:5]([C:10](=[O:12])[NH:13][CH2:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH2:20][CH2:21][O:22][CH2:23][CH2:24][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[CH:6]=[CH:7][CH:8]=2)[CH:3]=[CH:2]1