Hcx

BnO BnO-

dimer

Monomer shown in brackets with a 3-0- benzyl protecting group

BnO' BnO

BnO' BnO

2. TsOH, TEMPO, NaOCI, NaHC03

OBn I 3. Monomer, EDC, HOBT

4. TsOH, TEMPO, NaOCI, NaHC03

2. TsOH, TEMPO, NaOCI, NaHC03

3. Monomer, EDC, HOBT

0 0

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