1969-72-8Relevant articles and documents
A Photolabile Carboxyl Protecting Group for Solid Phase Peptide Synthesis
Yang, Hongpeng,Peng, Tao,Wen, Xiaoxue,Chen, Tingting,Sun, Yunbo,Liu, Shuchen,Wang, Gang,Zhang, Shouguo,Wang, Lin
, p. 497 - 502 (2021/05/04)
A new kind of photolabile protecting group (PLPG) for carboxyl moieties was designed and synthesized as the linker between resin and peptide. This group can be used for the protection of amino acid carboxyl groups. The peptide was synthesized on Nph (2-hy
PIII/PV=O Catalyzed Cascade Synthesis of N-Functionalized Azaheterocycles
Li, Gen,Luzung, Michael R.,Nykaza, Trevor V.,Radosevich, Alexander T.,Yang, Junyu
supporting information, p. 4505 - 4510 (2020/02/05)
An organocatalytic method for the modular synthesis of diverse N-aryl and N-alkyl azaheterocycles (indoles, oxindoles, benzimidazoles, and quinoxalinediones) is reported. The method employs a small-ring organophosphorus-based catalyst (1,2,2,3,4,4-hexamethylphosphetane P-oxide) and a hydrosilane reductant to drive the conversion of ortho-functionalized nitroarenes into azaheterocycles through sequential intermolecular reductive C?N cross coupling with boronic acids, followed by intramolecular cyclization. This method enables the rapid construction of azaheterocycles from readily available building blocks, including a regiospecific approach to N-substituted benzimidazoles and quinoxalinediones.
Atroposelective Arene Formation by Carbene-Catalyzed Formal [4+2] Cycloaddition
Xu, Ke,Li, Wenchang,Zhu, Shaoheng,Zhu, Tingshun
supporting information, p. 17625 - 17630 (2019/11/29)
Atroposelective arene formation is an efficient method to build axially chiral molecules with multi-substituted arenes. Reported here is an organocatalyzed atroposelective arene formation reaction by an N-heterocyclic carbene (NHC) catalyzed formal [4+2] cycloaddition of conjugated dienals and α-aryl ketones. This study expands the synthetic potential of NHC organocatalysis and provides a competitive pathway for the synthesis of axially chiral ligands, catalysts, and other functional molecules.