PYBOP AND PYBROP - 2 REAGENTS FOR THE DIFFICULT COUPLING OF THE ALPHA,ALPHA-DIALKYL AMINO-ACID, AIB
PYBOP AND PYBROP - 2 REAGENTS FOR THE DIFFICULT COUPLING OF THE ALPHA,ALPHA-DIALKYL AMINO-ACID, AIB
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DOI:
10.1016/s0040-4020(01)80922-4
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发表时间:
1991-01-07
期刊:
影响因子:
2.1
通讯作者:
JOUIN, P
中科院分区:
文献类型:
--
作者:
FREROT, E;COSTE, J;JOUIN, P
The difficult coupling of alpha-aminoisobutyric acid (Aib) was carried out using PyBOP(R) and PyBroP in a comparative study with BOP and BroP. These reagents gave good results under simple conditions (one pot, r.t., 1 h). Coded amino acids could be coupled with Aib using PyBOP under standard conditions of peptide synthesis without racemization whereas the coupling of two Aib residues required PyBroP/DMAP. A fragment containing an Aib C-terminal could be coupled without epimerization of the penultimate residue.