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.
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