G. Guichard et al., Solid phase synthesis of oligoureas using O-succinimidyl-(9H-fluoren-9-ylmethoxycarbonylamino)ethylcarbamate derivatives as activated monomers, TETRAHEDR L, 41(10), 2000, pp. 1553-1557
An efficient stepwise synthesis of oligoureas (up to the nonamer) on solid
support using O-succinimidyl-(9H-fluoren-9-ylmethoxycarbonylamino)ethylcarb
amate derivatives as activated monomers is described. These building blocks
were readily prepared starting from N-Fmoc-protected beta(3)-amino acids v
ia Curtius rearrangement of the corresponding acyl azides and treatment of
the resulting isocyanate with N-hydroxysuccinimide. (C) 2000 Elsevier Scien
ce Ltd. All rights reserved.