Direct ionic liquid promoted organocatalyzed diazo-transfer reactions: diversity-oriented synthesis of diazo-compounds
作者:Dhevalapally B. Ramachary、Vidadala V. Narayana、Kinthada Ramakumar
DOI:10.1016/j.tetlet.2008.02.159
日期:2008.4
A practical and novel ionic liquid promoted organocatalytic selective diazo-transfer process for the synthesis of highly substituted diazo-compounds in high yields is reported. The ionic liquid can be reused without affecting the reaction rates or yields over five runs.
Asymmetric Counter-Anion-Directed Aminomethylation: Synthesis of Chiral β-Amino Acids via Trapping of an Enol Intermediate
作者:Zhenghui Kang、Yongheng Wang、Dan Zhang、Ruibo Wu、Xinfang Xu、Wenhao Hu
DOI:10.1021/jacs.8b12832
日期:2019.1.30
A novel enantioselective aminomethylation reaction of diazo compound, alcohol and α-aminomethyl ether enabled by asymmetric counteranion-directed catalysis is disclosed that offers an efficient and convenient access to furnish optically active α-hydroxyl-β-amino acids in high yield with high to excellent enantioselectivities. Control experiments and DFT calculations indicate that the transformation
Provided is a novel compound represented by the following formula
Wherein each symbol is as defined in the specification, or a salt thereof, which has an angiotensin II receptor antagonistic activity and a peroxisome proliferator-activated receptor γ agonistic activity, and is useful as an agent for the prophylaxis or treatment of circulatory diseases such as hypertension and the like and/or metabolic diseases such as diabetes and the like, and the like.
Synthesis of 1,3-dioxo-substituted allenes via copper(I)-catalyzed coupling of α-oxo-alkynes and α-oxo-diazos by controlling the sequence of adding substrates
作者:Chulong Liu、Yunxiang Weng、Xiaobao Zeng、Weiping Zheng、Xinyan Wang、Yuefei Hu
DOI:10.1016/j.tetlet.2019.01.015
日期:2019.2
A novel direct synthesis of 1,3-dioxo-substituted allenes was developed by copper(I)-catalyzed coupling of α-oxo-alkynes and α-oxo-diazos. It was a sequence of adding substrates-controlled method and the desired products were synthesized chemoselectively by adding α-oxo-alkyne terminally.
Iron catalyzed efficient synthesis of poly-functional primary amines via the direct use of ammonia
作者:Chaoqun Ma、Jianghui Chen、Dong Xing、Yuan Sheng、Wenhao Hu
DOI:10.1039/c7cc00003k
日期:——
An iron catalyzed three-component reaction of alkyl diazoesters, isatins and ammonia is reported. This reaction provided convenient access to non-protected [small beta]-hydroxy-[small alpha]-aminoesters with adjacent quaternary stereocenters. This transformation is achieved via...