Traceless β-mercaptan-assisted activation of valinyl benzimidazolinones in peptide ligations.
Traceless β-mercaptan-assisted activation of valinyl benzimidazolinones in peptide ligations.
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肽连接中缬氨酰苯并咪唑啉酮的无痕 β-硫醇辅助活化
DOI:
10.1039/c7sc04148a
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发表时间:
2018-02-21
期刊:
影响因子:
8.4
通讯作者:
Dong S
中科院分区:
文献类型:
--
作者:
Wang Y;Han L;Yuan N;Wang H;Li H;Liu J;Chen H;Zhang Q;Dong S
An internal activation strategy-enabled traceless ligation at sterically hindered Val-Xaa site is accomplished under thiol additive-free conditions assisted by a β-mercaptan on the C-terminal valine residue. Peptidyl thioesters or their surrogates with C-terminal β-branched hydrophobic amino acid residues usually exhibit poor reactivities in ligation reactions. Thus, activation using exogenous additives is required to ensure an acceptable reaction efficiency. Herein, we report a traceless ligation at Val-Xaa sites under mild thiol additive-free reaction conditions, whereby the introduction of β-mercaptan on the C-terminal valine residue effectively activates the otherwise unreactive N-acyl-benzimidazolinone (Nbz), and enables the use of a one-pot ligation–desulfurization strategy to generate the desired peptide products. The orthogonality between β-thiovaline-Nbz and a conventional alkyl thioester, as well as the convenient access to the former from readily available penicillamine, also allowed expedited assembly of the peptidic hormone β-LPH and hPTH analogues, based on a kinetically controlled one-pot three-segment ligation and desulfurization strategy.
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影响因子:
16.6
作者:
Haase, Christian;Rohde, Heike;Seitz, Oliver
通讯作者:
Seitz, Oliver
影响因子:
56.9
作者:
DAWSON, PE;MUIR, TW;KENT, SBH
通讯作者:
KENT, SBH
影响因子:
8.4
作者:
Burlina, Fabienne;Papageorgiou, George;Offer, John
通讯作者:
Offer, John
影响因子:
15
作者:
Dong S;Shang S;Li J;Tan Z;Dean T;Maeda A;Gardella TJ;Danishefsky SJ
通讯作者:
Danishefsky SJ
DOI:
10.1039/ct9150701080
发表时间:
1915-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY
影响因子:
--
作者:
Beesley, RM;Ingold, CK;Thorpe, JF
通讯作者:
Thorpe, JF