Electronic and steric tuning of chiral diene ligands for rhodium-catalyzed asymmetric arylation of imines
作者:Kazuhiro Okamoto、Tamio Hayashi、Viresh H. Rawal
DOI:10.1039/b904624k
日期:——
Rhodium-catalyzedasymmetricarylation of imines using electronically and sterically-modified chiral diene ligands gave the corresponding diarylmethylamines in high yield and with high enantioselectivity using just 0.3 mol% of catalyst.
Rhodium-Catalyzed Addition of Alkyltrifluoroborate Salts to Imines
作者:Sumin Lee、Woo Lim Lee、Jaesook Yun
DOI:10.1002/adsc.201500295
日期:2015.7.6
An efficient rhodium‐catalyzed addition of potassium alkyltrifluoroboratesalts to imines is presented. In this reaction, secondary alkyltrifluoroboratesalts were coupled with N‐sulfonylimines in the presence of bis[(1,5‐cyclooctadiene)(hydroxy)rhodium] [Rh(OH)(cod)]2} in good yields under mild reaction conditions, and the γ‐amino ester products could be converted to β,γ‐substituted lactams via cyclization
Diastereoselective Base-Catalyzed Formal [4 + 2] Cycloadditions of <i>N</i>-Sulfonyl Imines and Cyclic Anhydrides
作者:Stephen W. Laws、Lucas C. Moore、Michael J. Di Maso、Q. Nhu N. Nguyen、Dean J. Tantillo、Jared T. Shaw
DOI:10.1021/acs.orglett.7b00468
日期:2017.5.19
A diastereoselective base-catalyzed Mannich reaction of cyclic, enolizable anhydrides and N-sulfonyl imines for the synthesis of δ-lactams is reported. This anhydride Mannich reaction tolerates imines derived from aryl and enolizable aldehydes. A base-catalyzed product epimerization pathway ensures high anti diastereoselectivity in aryl and achiral enolizable imines.