Rh<sub>2</sub>(esp)<sub>2</sub>: An Efficient Catalyst for O-H Insertion Reactions of Carboxylic Acids into Acceptor/Acceptor Diazo Compounds
作者:Arianne C. Hunter、Kiran Chinthapally、Indrajeet Sharma
DOI:10.1002/ejoc.201600064
日期:2016.5
Rh2(esp)2 has been identified as a highly efficient catalyst for O–H insertion of carboxylic acids into acceptor/acceptor diazocompounds. The insertion reaction proceeds in CH2Cl2 within minutes at room temperature in excellent yields and accommodates carboxylic acids having varying functionalities including amino acids, free alcoholic and phenolic O–H, indole N–H, alkenes, alkynes, and substituted
Enantioselective Conjugate Addition of 2-Acylimidazoles with Nitroalkenes Promoted by Chiral-at-Metal Rhodium(III) Complexes
作者:Ganesh Kumar Thota、Gui-Jun Sun、Tao Deng、Yi Li、Qiang Kang
DOI:10.1002/adsc.201701377
日期:2018.3.20
An enantioselective conjugate addition of 2‐acylimidazoles with nitroalkenes catalyzed by chiral‐at‐metal rhodium(III) complex under mild reaction conditions was developed, affording versatile γ‐nitro ketone skeletons in good yields with excellent enantioselectivities (up to >99% ee).
Rapid synthesis of substituted pyrrolines and pyrrolidines by nucleophilic ring closure at activated oximes
作者:Nandkishor Chandan、Amber L. Thompson、Mark G. Moloney
DOI:10.1039/c2ob26423d
日期:——
Substituted pyrrolines are available by ringclosure initiated by direct nucleophilic attack of stabilized enolates at the nitrogen of oximes activated with a leaving group, in a process which effectively out-competes the more usual Beckmann rearrangement. Subsequent reduction provides diastereoselective access to the corresponding pyrrolidines. This provides a rapid route to saturated heterocyclic
A direct route to 2,2,5-trisubstituted pyrrolidines of relevance to kaitocephalin
作者:Nandkishkor Chandan、Mark G. Moloney
DOI:10.1016/j.tetlet.2013.01.130
日期:2013.4
2,2,5-Trisubstituted pyrrolidines of relevance to the core of kaitocephalin are readily available by an oxime ring closure using substrates derived from aspartic acid. (C) 2013 Elsevier Ltd. All rights reserved.