Tandem sp3 C-H functionlization/decarboxylation of 2-alkylazaarenes with coumarin-3-carboxylic acids

Bifunctional thiourea catalyzed asymmetric Michael addition of anthrone to methyleneindolinones

Bifunctional thiourea catalyzed asymmetric conjugate addition of anthrones to methyleneindolinones were developed to prepare biologically significant hybrid derivatives of oxindoles and anthrones in high yield, high regioselectivity and stereoselectivity.

Transition metal-free decarboxylative alkylation reactions

This review summarizes recent advances in the transition metal-free decarboxylative alkylation of carboxylic acids and their derivatives.

Tautomerization of 2,6-lutidines in the presence of B(C6F5)3 using catecholborane as a precatalyst

The Lewis pair of 2,6-lutidine and B(C₆F₅)₃ can undergo tautomerization to produce enamine B(C₆F₅)₃ adducts when catecholborane is applied as a precatalyst.

Friedel–Crafts alkylation of heteroarenes and arenes with indolyl alcohols for construction of 3,3-disubstituted oxindoles

An intriguing camphorsulfonic acid catalyzed Friedel–Crafts alkylation of arenes with indolyl alcohols has been developed featuring mild reaction conditions, wide substrate scope and high yields.

Bi(OTf)3-catalyzed C–H bond functionalization of azaarenes for the facile access to oxindoles featuring quaternary carbon centers

Bi(OTf)₃-catalyzed sp³ C–H functionalization of 2-alkyl azaarenes to isatylidene malononitriles has been achieved to give oxindoles containing an all-carbon quaternary center.

Solvent free one-pot multi-component synthesis of β-azaarene substituted ketones via a Sn-catalyzed C(sp3)–H functionalization of 2-alkylazaarenes

A tin-catalyzed solvent free one-pot multi-component cascade reaction strategy for the efficient synthesis of β-azaarene substituted ketones via an aldol–Michael addition/C(sp³)–H functionalization of 2-alkylazaarenes has been developed.

Utilization of methylarenes as versatile building blocks in organic synthesis

This review attempts to describe the latest developments in the utilisation of methylarenes adopting C–H functionalization strategies and covers all the developments until March 2015.

Iron-catalyzed C(sp3)–H functionalization of methyl azaarenes: a green approach to azaarene-substituted α- or β-hydroxy carboxylic derivatives and 2-alkenylazaarenes

An iron-catalyzed C(sp³)–H functionalization of methyl azaarenes with carbonyls to access the title compounds have been described.

Catalyst-free tandem Michael addition/decarboxylation of (thio)coumarin-3-carboxylic acids with indoles: facile synthesis of indole-3-substituted 3,4-dihydro(thio)coumarins

The tandem Michael addition/decarboxylation of (thio)-coumarin-3-carboxylic acids with indoles gives biologically important indole-3-substituted dihydrocoumarins in good to excellent yields under catalyst-free conditions.

Facile synthesis of azaarene-2-substituted chromanone derivatives via tandem sp3 C–H functionalization/decarboxylation of azaarenes with 4-oxo-4H-chromene-3-carboxylic acid

A facile catalyst-free tandem sp³ C–H functionalization/decarboxylation of 4-oxo-4H-chromene-3-carboxylic acid with 2-alkylazaarenes was developed, which can construct the biologically significant azaarene 2-substituted chromanones in a single step.

Pentacyclic coumarin-based blue emitters – the case of bifunctional nucleophilic behavior of amidines

Esters of coumarin-3-carboxylic acids undergo addition to DBU and DBN leading to the formation of a 6-membered ring.