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Enantioselective Friedel-Crafts reaction between indoles and a,b-unsaturated aldehydes catalyzed by recyclable a,a-diarylprolinol derived chiral ionic liquids

期刊: TETRAHEDRON LETTERS, 2023; 116 ()

Imidazolium-based chiral ionic liquid containing a ,a-diaryl-(S)-prolinol trimethylsilyl ether acts as an efficient and reusable organocatalyst for th......

Selective indirect electrochemical oxidation of sulfides and thiols using DDQ as an efficient and cost-effective electrocatalyst

期刊: TETRAHEDRON LETTERS, 2023; 117 ()

The efficient oxidation of sulfides to sulfoxides and the oxidative coupling of thiols to disulfides was per-formed electrochemically in the presence ......

Total synthesis of (±)-pterosin M and (±)-onitisin

期刊: TETRAHEDRON LETTERS, 2023; 117 ()

Total synthesis of phenolic sesquiterpene pterosin M has been achieved from known indanone via bromi-nation, Suzuki-Miyaura cross coupling, oxone medi......

Facile synthesis of stilbene-derivatized Schiff base ligands and their Cu (II) complexes

期刊: TETRAHEDRON LETTERS, 2023; 118 ()

Herein we present the synthesis and characterization of three Schiff base ligands derivatized with stil-bene groups and their Cu(II) complexes CuL1-3,......

Amino-cobalt(II)phthalocyanine supported on silica chloride as an efficient and reusable heterogeneous photocatalyst for oxidation of alcohols

期刊: TETRAHEDRON LETTERS, 2023; 118 ()

The selective photocatalytic oxidation of alcohols is considered as a valuable process in order to produce aldehydes and ketones. In the present study......

Advances in the synthesis of dragmacidin E

期刊: TETRAHEDRON LETTERS, 2023; 125 ()

This paper presents the advances in the synthesis of dragmacidin E. Since its isolation from a southern Australian deep-water marine sponge by Capon e......

Base-promoted facile synthesis of quinoxalines from β, β-dibrominated secondary enamides and o-phenylenediamines

期刊: TETRAHEDRON LETTERS, 2023; 126 ()

Herein, we report a base-promoted reaction of /?, /?-dibrominated secondary enamides and o-phenylenediamines, thus providing facile access to quinoxal......

Acid/base-co-catalyzed cyclization of ketones with o-amino-benzylamines: Direct synthesis of quinoline compounds

期刊: TETRAHEDRON LETTERS, 2023; 128 ()

A novel acid/base-co-catalyzed tandem cyclization of various ketones with o-amino-benzylamines employing molecular oxygen as the clean oxidant has bee......

Deconstruction of 18β-glycyrrhetinic acid into gram scale multifunctional chiral synthons

期刊: TETRAHEDRON LETTERS, 2023; 128 ()

The transformation of 18 beta-glycyrrhetinic acid into two significant chiral synthons has been successfully showcased employing gentle reaction condi......

Rh-catalyzed hydrogenation of the carbon-carbon double bond in carbostyril derivatives using [Rh(cod)2]BF4 and Et3SiH under mild conditions

期刊: TETRAHEDRON LETTERS, 2023; 129 ()

Metal-catalyzed hydrogenation is often conducted in organic synthesis. Although H2 is frequently used as a reducing agent, Et3SiH is also used for the......

Approach to α-fluorinatedacetoxy ketones by fluoroacetoxylation of alkynes with hyper-valent iodine(III) reagents

期刊: TETRAHEDRON LETTERS, 2023; 132 ()

An efficient method for the straightforward synthesis of alpha-fluorinatedacetoxy ketones has been described using fluoro-containing hyper-valent iodi......

Photoinduced stereoselective hydroalkylation of terminal arylalkynes via C(sp3)-H functionalization

期刊: TETRAHEDRON LETTERS, 2023; 115 ()

A photoinduced stereoselective hydroalkylation of terminal arylalkynes via C(sp3)-H activation was developed. This method employed an organic dye 2,4,......

Direct synthesis of amides through transamidation using dichloroimidazolinedione (DCID)

期刊: TETRAHEDRON LETTERS, 2023; 118 ()

The C-N bond of carboxamides is extremely stable under most conditions. The present study reveals an unconventional approach to the transamidation of ......

Transition-metal-free synthesis of 2-arylphenol via SNAr reaction of dibenzothiophene dioxide with KOH

期刊: TETRAHEDRON LETTERS, 2023; 119 ()

2-Arylphenols have been synthesized by KOH/DMSO mediated tandem SNAr/desulfurization reactions of dibenzothiophene dioxide. Diversely substituted phen......

One-pot synthesis of 2,6-diaryl-4,5-dihydropyridazin-3(2H)-ones: Copper catalyzed annulation of aldehydes, arylhydrazines and 3-acryloyloxazolidin-2-one

期刊: TETRAHEDRON LETTERS, 2023; 121 ()

The three-component synthesis of pyridazinones from aldehydes, arylhydrazines and 3-acryloyloxazo-lidin-2-one catalyzed by Cu(OTf)2 has been developed......

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