Diastereoselective intermolecular coupling of chiral α-imino amides with ketones by electroreduction
摘要:
The electroreductive intermolecular coupling of chiral alpha-imino N,N-dialkylamides derived from (S)-alpha-amino N,N-dialkylamides and aromatic aldehydes with ketones in the presence of chlorotrimethylsilane and triethylamine gave beta-amino alcohols with moderate to good (R)-stereoselectivity. (C) 2011 Elsevier Ltd. All rights reserved.
[EN] GLUCOCORTICOID RECEPTOR MODULATORS<br/>[FR] MODULATEURS DE RÉCEPTEURS DES GLUCOCORTICOÏDES
申请人:ORIC PHARMACEUTICALS INC
公开号:WO2018191283A1
公开(公告)日:2018-10-18
Described herein are glucocorticoid receptor modulators and pharmaceutical compositions comprising said compounds. The subject compounds and compositions are useful for the treatment of cancer and hypercortisolism.
The first primary aminocatalytic direct cross-aldol reaction of acetaldehyde is presented. Among the various vicinal diamines screened, the L-tert-leucine derivative 1c in conjunction with (H4SiW12O40)0.25 was identified as the optimal catalyst; good catalytic activity (up to 99 % yield in 4 h), and high enantioselectivities (up to 92 % ee) were achieved for a range of donors, including aromatic aldehydes
Merrifield resin and on poly(ethyleneglycol) are reported. The latter is shown to work excellently in asymmetric copper(II)-catalyzed Michael reactions of cyclic β-oxo esters 2 with methyl vinyl ketone (4), yielding the corresponding addition products 5 with quaternary stereocenter in selectivities of 97–99 % ee. The PEG-supported auxiliary 1d can be precipitated from diethyl ether solutions and reused
Dialkyl amides of L-valine, L-isoleucine, and L-tert-leucine (2) are excellent chiral auxiliaries for the construction of quaternary stereocenters at ambient temperature. Enaminoesters 3, prepared from these auxiliaries 2 and Michael donors 1, undergo a copper-catalyzed asymmetricMichaelreaction with methyl vinyl ketone (MVK, 4) to afford products 5 in 70-90% yield and 90-99% ee (enantiomeric excess)
A convergent synthesis of new β-turn mimics by click chemistry
作者:Keunchan Oh、Zhibin Guan
DOI:10.1039/b606185k
日期:——
Alkyne-azide cycloaddition ("click" chemistry) between two peptide strands derivatized with terminal azide and alkyne, respectively, provides an efficient convergentsynthesis of triazole ring-based new beta-turn mimics.