N-Boc Amines to Oxazolidinones via Pd(II)/Bis-sulfoxide/Brønsted Acid Co-Catalyzed Allylic C–H Oxidation
摘要:
A Pd(II)/bis-sulfoxide/Bronsted acid catalyzed allylic C-H oxidation reaction for the synthesis of oxazolidinones from simple N-Boc amines is reported. A range of oxazolidinones are furnished in good yields (avg 63%) and excellent diastereoselectivities (avg 15:1) to furnish products regioisomeric from those previously obtained using allylic C-H amination reactions. Mechanistic studies suggest the role of the phosphoric acid is to furnish a Pd(II)bis-sulfoxide phosphate catalyst that promotes allylic C-H cleavage and pi-allylPd functionalization with a weak, aprotic oxygen nucleophile and to assist in catalyst regeneration.
[EN] GAMMA-AMINOAMIDE MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY<br/>[FR] MODULATEURS GAMMA-AMINOAMIDES DE L'ACTIVITE DE RECEPTEUR DE CHIMIOKINE
申请人:MERCK & CO INC
公开号:WO2004041279A1
公开(公告)日:2004-05-21
The present invention is directed to compounds of the formula (I), wherein R1, R2, R3, R4, R5, R6, R7, R8, R11, R12, W, X, and n are defined herein, which are useful as modulators of chemokine receptor activity. In particular, these compounds are useful as modulators of the chemokine receptor CCR-2.
Palladium-Catalyzed Allylic Alkylation of Doubly Deprotonated Carboxylic Acids
作者:Manfred Braun、Panos Meletis、Robin Visse
DOI:10.1002/adsc.201100372
日期:2011.12
Doublydeprotonatedcarboxylicacids undergo smooth palladium-catalyzed carbon alkylations with the allylic substrates methyl allyl carbonate and (E)-methyl (pent-3-en-2-yl) carbonate to give γ,δ-unsaturated carboxylicacids. A diastereoselective and enantioselective protocol leads to (2S,3R)-hexenoic acid in 87% ee.
Trialkylamine-mediated intramolecular cyclization of pent-4-enoyl chlorides was studied. Substitution with a tertiary alkyl group at the 2-position gave cyclopent-2-en-1-ones, while substitution with an aromatic group gave enol esters, which were formed by O-acylation of initially formed 3-chlorocyclopentanones with ketenes.
Aminolactonization of Unactivated Alkenes Catalyzed by Aryl Iodine
作者:Lu-Wen Zhang、Xiao-Jun Deng、Dong-Xu Zhang、Qin-Qin Tian、Wei He
DOI:10.1021/acs.joc.1c00074
日期:2021.4.2
protocol of the aryl iodine-catalyzed aminolactonization of unactivated alkenes under oxidation conditions was first reported to efficiently construct diverse amino lactones in a short time using HNTs2 as the compatible nitrogen source. In addition, we investigated the influence of the reaction rate based on the structure of the iodoarene precatalyst, which revealed the selective adjustment effect on aminolactonization
Gamma-aminoamide modulators of chemokine receptor activity
申请人:Butora Gabor
公开号:US20050261325A1
公开(公告)日:2005-11-24
The present invention is directed to compounds of the formula (1), wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
, R
11
, R
12
, W, X, and n are defined herein, which are useful as modulators of chemokine receptor activity. In particular, these compounds are useful as modulators of the chemokine receptor CCR-2.