3-Carboxamide oxindoles as 1,3-C,N-bisnucleophiles for the highly diastereoselective synthesis of CF3-containing spiro-δ-lactam oxindoles featuring acyl at the ortho-position of spiro carbon atom
obtained in moderate to good yields with excellent diastereoselectivities under mild conditions. This work represents the first example of a systematic study of 3-carboxamide oxindoles as 1,3-C,N bisnucleophiles.
Expansion of annulation of allenoates with trifluoroketones: Synthesis of trifluoromethylated dihydropyrans
作者:Tong Wang、Yanpeng Liu、Jinyi Xu
DOI:10.1080/00397911.2017.1402348
日期:2020.2.1
Abstract The DABCO-catalyzed [2 + 2] annulation of allenoates with trifluoroketones could be expanded to [4 + 2] annulation to synthesize trifluoromethylated dihydropyrans with trifluoromethyl oxadienes as the electrophilic annulation partners. GRAPHICAL ABSTRACT
Enantio- and Diastereoselective Formal Hetero-Diels-Alder Reactions of Trifluoromethylated Enones Catalyzed by Chiral Primary Amines
作者:Yong-Jun Lin、Li-Na Du、Tai-Ran Kang、Quan-Zhong Liu、Ze-Qin Chen、Long He
DOI:10.1002/chem.201501897
日期:2015.8.10
Enantioselective formal hetero‐Diels‐Alderreactions of trifluoromethylated enones and 2‐amino‐1,3‐butadienes generated in situ from aliphatic acyclic enones and chiral primary amines are reported. The corresponding tetrahydropyran‐4‐ones are formed in up to 94 % yield and with up to 94 % ee. The reaction was carried out through a stepwise mechanism, including initial aminocatalytic aldol condensation