Amino(hetero)arylmethylation of Phenols with N-[α-Amino(hetero)arylmethyl]benzotriazoles
摘要:
N-[alpha-Amino(hetero)arylmethyl]benzotriazole derived from a variety of (hetero)aromatic aldehydes were reacted with sodium phenolates to afford amino(hetero)arylmethylated phenols in high yields.
domino reaction involving Lewis acid-mediated nucleophilic-substitution/intramolecular-cyclization/reverse Claisen condensation of 2-(aryl(piperidin-1-yl)methyl)phenols and 1,3-diketones has been developed for the synthesis of 2-(3-oxo-1-phenylbutyl)phenyl acetates in good to excellent yields (77%–95%). The construction of the products has been accomplished via the domino generation of two new σ-bonds
Über Mannichbasen, 21. Mitt.1) Austauschreaktionen von Phenolmannichbasen
作者:Hans Möhrle、Christoph Miller
DOI:10.1002/ardp.19833160309
日期:——
Verschiedene p‐Phenolmannichbasen und in geringerem Umfang auch o‐Derivate erleiden beim Erhitzen in wäßrig‐alkoholischem Milieu unter Zusatz von Na2EDTA oder Essigsäure Amin‐Eliminierung mit anschließender Addition der Lösungsmittel an das Chinon‐Methid zu entsprechenden Alkoholen und Ethern.
FeCl<sub>3</sub>-Mediated One-Pot Domino Reactions for the Synthesis of 9-Aryl/9-Arylethynyl-2,3,4,9-tetrahydro-1<i>H</i>-xanthen-1-ones from Propargylic Amines/Diaryl Amines and 1,3-Cyclohexanediones
An efficient, environmentally friendly and one-pot route to new 9-aryl/9-arylethynyl-2,3,4,9-tetrahydro-1H-xanthen-1-one derivatives from inexpensive starting materials has been developed. This method proceeded by a domino nucleophilic-substitution/intramolecular cyclization/dehydration sequence of propargylic amines/diaryl amines and 1,3-cyclohexanediones under the promotion of FeCl3, which involved
Selective synthesis of 2‐(5‐oxo‐1‐arylhex‐1‐yn‐3‐yl)phenyl benzoates via FeCl
<sub>3</sub>
‐mediated cascade reactions of propargylamines with
<i>β</i>
‐enamino ketones
A mild and efficient FeCl3‐mediated cascade reaction of ortho‐hydroxyl propargylamines with β‐enamino ketones has been developed. This protocol provided a practical and selective method to synthesize 2‐(5‐oxo‐1‐arylhex‐1‐yn‐3‐yl)phenyl benzoates via in situ generated alkynyl o‐quinone methides following a cascade intermolecular 1,4‐conjugate addition/intramolecular nucleophilic addition/reverse Claisen