42856-53-1Relevant academic research and scientific papers
Synthesis of Chiral γ-Lactams via in Situ Elimination/Iridium-Catalyzed Asymmetric Hydrogenation of Racemic γ-Hydroxy γ-Lactams
Yuan, Qianjia,Liu, Delong,Zhang, Wanbin
supporting information, p. 1886 - 1889 (2017/04/11)
Chiral γ-lactams have been synthesized in excellent yields and enantioselectivities (up to 99% yield and 96% ee) from easily accessible racemic γ-hydroxy γ-lactams via an iridium-phosphoramidite catalyzed asymmetric hydrogenation. The reaction was designed based on insight into the reaction mechanism demonstrated in previous work and can be carried out at a reduced catalyst loading of 0.1 mol % on a gram scale. Several potential bioactive compounds can be synthesized from the reduced products. Mechanistic studies indicated that the reduced products were obtained via the hydrogenation of the N-acyliminium cations, generated from γ-hydroxy γ-lactams.
NOVEL COMPOUNDS
-
Page/Page column 89, (2011/08/22)
The present invention relates to new CGRP-antagonists of general formula I wherein U, V, X, Y, R1, R2, R3 and R4 are defined as mentioned in the description, the tautomers thereof, the isomers thereof, the diastereomers thereof, the enantiomers thereof, the hydrates thereof, the mixtures thereof and the salts thereof as well as the hydrates of the salts, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases, medicaments containing these compounds, the use thereof and processes for the preparation thereof.
Synthesis of functionalized isoindolinones: Addition of in situ generated organoalanes to acyliminium ions
Pierce, Joshua G.,Waller, David L.,Wipf, Peter
, p. 4618 - 4629 (2008/03/12)
Addition of in situ generated di- or trisubstituted alkenylalanes to N-acyliminium ions provides rapid access to functionalized isoindolinones. Subsequent ring closing metathesis leads to tricyclic products. These transformations proceed under mild condit
