Gold-Catalyzed Hydroamination of Propargylic Alcohols: Controlling Divergent Catalytic Reaction Pathways To Access 1,3-Amino Alcohols, 3-Hydroxyketones, or 3-Aminoketones
作者:Victor Laserna、Michael J. Porter、Tom D. Sheppard
DOI:10.1021/acs.joc.9b00988
日期:2019.9.20
Alternatively, by using a catalytic quantity of aniline, 3-hydroxyketones can be obtained in high yield directly from propargylic alcohols. Further manipulation of the reaction conditions enables the selective formation of 3-aminoketones via a rearrangement/hydroamination pathway. The utility of the new chemistry was exemplified by the one-pot synthesis of a selection of N-arylpyrrolidines and N-arylpiperidines
[EN] NOVEL PIPERIDINE/8-AZABICYCLO [3.2.1] OCTAN DERIVATIVES AS MODUILATORS OF CHEMOKINE RECEPTOR CCR5<br/>[FR] NOUVEAUX DERIVES DE PIPERIDINE/8-AZABICYCLO [3.2.1] OCTANE UTILISES COMME MODULATEURS DES RECEPTEURS CCR5 DE LA CHEMOKINE
申请人:ASTRAZENECA AB
公开号:WO2006001752A1
公开(公告)日:2006-01-05
Compounds of formula (I) wherein neither R4 nor R5 is hydrogen; compositions comprising them, processes for preparing them and their use in medical therapy (for example modulating CCR5 receptor activity in a warm blooded animal).
An aminoalcohollibrary was constructed by parallelsynthesis based on Mannich-typethree-componentreactions of aldehydes, amines, and polymersupported silyl enol ethers, followed by reductive cleavage from the supports. “FieldSynthesis”, which provides an efficient method for the construction of libraries, is introduced.
5-(4′-chloromethylphenyl)pentylpolystyrene resin (CMPP resin). A new linker resin for solid-phase organic synthesis under Lewis acidic conditions
作者:Shū Kobayashi、Mitsuhiro Moriwaki
DOI:10.1016/s0040-4039(97)00857-5
日期:1997.6
A new linker resin for solid-phaseorganicsynthesis under Lewis acidic conditions has been developed. The resin, 5-(4′-chloromethylphenyl)pentylpolystyrene resin (CMPP resin), has no oxygen or nitrogen atoms in its spacer moiety. Imino aldol reactions of polymer-supported silyl enol ethers using the new resin with imines were demonstrated in the presence of a Lewis acid, and it was shown that the
Polymer-supported silyl enol ethers (thioketene silyl acetals) were prepared from chloromethyl copoly-(styrene-1%-divinylbenzene) resin. The silyl enol ethers reacted with imines in the presence of a catalytic amount of scandium triflate (Sc(OTf)3) to afford β-amino thioesters, which were reduced to amino alcohols in good yields. These reactions provide a convenient method for the preparation of an