Phenylsilane → Fmoc-Dap-OH

Reaction equation

[CH:1]1[C:13]2[CH:12]([CH2:14][O:15][C:16]([NH:18][C@H:19]([C:28]([OH:30])=[O:29])[CH2:20][NH:21]C(OCC=C)=O)=[O:17])[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[C:5]=2[CH:4]=[CH:3][CH:2]=1.C1([SiH3])C=CC=CC=1>ClCCl.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:21][CH2:20][C@@H:19]([C:28]([OH:30])=[O:29])[NH:18][C:16]([O:15][CH2:14][CH:12]1[C:11]2[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=2[C:5]2[C:13]1=[CH:1][CH:2]=[CH:3][CH:4]=2)=[O:17]

Participants

Procedure

A mixture of N-[(9H-fluoren-9-ylmethoxy)carbonyl]-3-[(2-propenyloxy)carbonyl]amino-L-alanine resin (Example 64; 2 g), tetrakis(triphenylphosphine)palladium(0) (509 mg, 0.45 mmol), and phenylsilane (21.9 mmol) in dichloromethane (20 mL) was shaken for 35 min. The resin was washed with dichloromethane and methanol, then vortexed with dimethylformamide/water (1:1) at room temperature for 10 min, and washed again with dichloromethane and methanol to give 3-amino-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-alanine on Wang resin.