Conformational Restriction in Novel NAN-190 and MP3022 Analogs and Their 5-HT1A Receptor Activity

N2-Selective β-Thioalkylation of Benzotriazoles with Alkenes

Herein, N²-selective β-thioalkylation of benzotriazoles with unactivated alkenes and styrenes is reported. The N²-selective β-thioalkylation of benzotriazoles is highly stereospecific and works under simple and mild conditions, exhibiting excellent functional group tolerance. The high N²-selectivity is a consequence of the combination of hydrogen bonding and Lewis acid/base activation, which reverses the N²-position to be favored for alkylation.

1,6-Addition of 1,2,3-NH triazoles to para-quinone methides: Facile access to highly selective N1 and N2 substituted triazoles

The regioselective syntheses of N¹ and N² substituted triazoles through a 1,6-addition reaction of 1,2,3-NH triazoles to p-quinone methide were achieved under mild reaction conditions. The present reactions showed superior results in terms of selectivity, mild reaction conditions, short reaction time and broad substrate scope with good functional-group compatibility. Considering the high synthetic value of N¹- and N²-substituted compounds and p-QM related research, the present strategy will greatly benefit researchers in various fields.

Acid-catalyzed three-component addition of carbonyl compounds with 1,2,3-triazoles and indoles

A facile and efficient acid-catalyzed three-component reaction of indoles, 1-tosyl-1,2,3-triazoles and carbonyl compounds has been developed. The use of TsOH with a small amount of water significantly promoted the reaction yield. This method provided a general and one-pot approach for the synthesis of structurally diverse C3-alkylated indole derivatives. The alkylation exclusively occurred at the N² position of triazoles. Various functional groups were tolerated under the optimized simple reaction conditions.

Scandium-catalyzed highly selective N2-alkylation of benzotriazoles with cyclohexanones

A scandium-catalyzed highly N²-selective alkylation of benzotriazoles with cyclohexanones has been developed.

Catalyst-Free Regioselective N2 Arylation of 1,2,3-Triazoles Using Diaryl Iodonium Salts

The widespread application of 1,2,3-triazoles in pharmaceuticals has resulted in substantial interest toward developing efficient postmodification methods. Whereas there are many postmodification methods available to obtain N¹-substituted 1,2,3-triazoles, developing a selective and convenient protocol to synthesize N²-aryl-1,2,3-triazoles has been challenging. We report a catalyst-free and regioselective method to access N²-aryl-1,2,3-triazoles in good to excellent yields (66-97%). This scalable postmodification protocol is effective for a wide range of substrates.

Gold(i) catalysed regio- and stereoselective intermolecular hydroamination of internal alkynes: towards functionalised azoles

Vinyl- and saturated azoles were synthesised through gold(i) catalysed regio- and stereoselective intermolecular hydroamination of internal alkynes and subsequent hydrogenation.