Tryptophan (Trp) and tryptophan derivatives are C2-arylated. A C–Hactivation process allows the preparation of both protected and unprotected arylated-Trp amino acids, directly from the amino acid precursor and aryl iodides. The obtained compounds are suitable for standard solid-phase peptide synthesis.
申请人:LIPACO Co., Ltd. 리파코 주식회사(119990457451) Corp. No ▼ 150111-0032635BRN ▼301-81-32627
公开号:KR20150002928U
公开(公告)日:2015-07-29
본 고안은 서로 인접하는 매트 블록들의 측면이 서로 결합 되어 조립되는 조립식 매트에 관한 것으로서, 설정된 두께를 가지는 판형의 매트 블록; 및 상기 매트 블록의 측면에 구비되며 자력으로 서로 다른 매트 블록의 측면을 결합시키는 결합 부재;로서, 동일한 형상과 면적을 가지는 서로 다른 매트 블록의 각 측면이 서로 일치되도록 자력에 의해 결합시키는 결합 부재;를 포함하는 조립식 매트가 제공된다. 이에 의하면 자석이 형성되어 있는 매트 블록을 사용함에 있어서, 조립은 물론 분리가 간편하고 편리하게 이루어질 수 있는 효과가 있다.
Sulfonylation of Aryl Halides by Visible Light/Copper Catalysis
作者:Qiuli Yan、Wenwen Cui、Xiuyan Song、Guiyun Xu、Min Jiang、Kai Sun、Jian Lv、Daoshan Yang
DOI:10.1021/acs.orglett.1c01050
日期:2021.5.7
An efficient visible-light-assisted, copper-catalyzed sulfonylation of arylhalides with sulfinates is reported. In our protocol, a single ligand CuI photocatalyst formed in situ was used in the photocatalytic transformation. Diverse organosulfones were obtained in moderate to good yields. This strategy demonstrates a promising approach toward the synthesis of diverse and useful organosulfones.
Achieving Nickel Catalyzed C–S Cross-Coupling under Mild Conditions Using Metal–Ligand Cooperativity
作者:Rina Sikari、Suman Sinha、Siuli Das、Anannya Saha、Gargi Chakraborty、Rakesh Mondal、Nanda D. Paul
DOI:10.1021/acs.joc.9b00075
日期:2019.4.5
thiols and (hetero)aryl halides under mild conditions, mostly at room temperature, catalyzed by well-defined singlet diradical Ni(II) catalysts bearing redox noninnocent ligands is reported. Taking advantage of ligand centered redox events, the high-energetic Ni(0)/Ni(II) or Ni(I)/Ni(III) redox steps were avoided in the catalyticcycle. The cooperative participation of both nickel and the coordinated ligands
Deoxygenative cross-electrophile coupling of benzyl chloroformates with aryl iodides
作者:Yingying Pan、Yuxin Gong、Yanhong Song、Weiqi Tong、Hegui Gong
DOI:10.1039/c9ob00628a
日期:——
This work describes Ni-catalyzed cross-electrophile coupling of benzyl chloroformate derivatives with aryl iodides that generates a wide range of diaryl methane products. The mild reaction conditions merit the C–O bond radical fragmentation of benzyl chloroformates via halide abstraction or a single electron reduction by a Ni catalyst. This work offers a new substrate type for cross-electrophile couplings
这项工作描述了镍催化的氯甲酸苄酯衍生物与芳基碘化物的交叉亲电子偶联,生成多种二芳基甲烷产物。温和的反应条件使得氯甲酸苄酯的 C-O 键自由基通过卤化物夺取或 Ni 催化剂的单电子还原而断裂。这项工作为交叉亲电子偶联提供了一种新的底物类型。