Pd(ii)-catalyzed alkylation of unactivated C(sp3)–H bonds: efficient synthesis of optically active unnatural α-amino acids
作者:Kai Chen、Fang Hu、Shuo-Qing Zhang、Bing-Feng Shi
DOI:10.1039/c3sc51747k
日期:——
A palladium-catalyzedalkylation of primary and secondary C(sp3)–H bonds with alkyl iodides and/or bromides for the synthesis of optically active unnatural α-amino acids (α-AAs) is described. This process is scalable and tolerates a variety of functional groups with complete retention of chirality, providing an efficient new strategy for the synthesis of various unnatural α-amino acid derivatives.
Transamidation and Decarbonylation of <i>N</i>-Phthaloyl-Amino Acid Amides Enabled by Palladium-Catalyzed Selective C–N Bond Cleavage
作者:Hao-Yu Zhang、Xuan-Wen Tao、Li-Na Yi、Zhi-Gang Zhao、Qiang Yang
DOI:10.1021/acs.joc.1c02245
日期:2022.1.7
Amides are important functional synthons that have been widely used in the construction of peptides, natural products, and drugs. The C–N bond cleavage provides the direct method for amide conversion. However, amides, especially secondaryamides, tend to be chemically inert due to the resonance of the amide bond. Here, we describe an efficient Pd-catalyzed transamidation and decarbonylation of multiamide
Palladium‐Catalysed C(sp
<sup>3</sup>
)−H Glycosylation for the Synthesis of C‐Alkyl Glycoamino Acids
作者:Yichu Liu、Yibing Wang、Wenhao Dai、Wei Huang、Yingxia Li、Hong Liu
DOI:10.1002/anie.201914184
日期:2020.2.24
highly efficient and practical approach for palladium-catalyzed trifluoroacetate-promoted N-quinolylcarboxamide-directed glycosylation of inert β-C(sp3 )-H bonds of N-phthaloyl α-amino acids with glycals under mild conditions. For the first time, C(sp3 )-H activation for glycosylation was achieved to build C-alkyl glycosides. This method facilitates the synthesis of various β-substituted C-alkyl glycoamino