An efficient and green method has been developed for the synthesis of kojic acid derivatives by employing 20 mol% β-cyclodextrin in aqueous media.

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Spiro[4H-pyran-3,3'-oxindoles]. -The title catalyst, derived from bioglycerol, is successfully used for the one-pot three-component condensation of isatins or acenaphthenequinone with 1,3-dicarbonyl compounds and malononitrile or ethyl cinnnamate. -(RAO, B. M.; REDDY, G. N.; REDDY, T. V.; DEVI, B. L. A. P.; PRASAD, R. B. N.; YADAV, J. S.; REDDY*, B. V. S.; Tetrahedron Lett. 54 (2013) 20, 2466-2471, http://dx.

A new CuI/DMSO-mediated oxidative domino process has been developed for the synthesis of tryptanthrin derivatives. This is the first example of the synthesis of tryptanthrin deriv-

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A strategy has been devised for the stereoselective synthesis of hexahydroindeno[2,1‐c]pyran scaffolds through a domino cyclization of (E)‐3,5‐diphenylpent‐4‐en‐1‐ol with aldehydes using BF3⋅OEt2 at 70 °C. It is an approach for the construction of the indeno[2,1‐c]pyran skeleton in a one‐pot operation through a cascade cyclization.

A novel method is devised for the synthesis of 2,4-disubstituted oxazole derivatives via the coupling of α-diazoketones with amides using copper(II) triflate as the catalyst. The synthetic versatility of this approach is exemplified in the synthesis of an analogue of balsoxin.

A variety of aldehydes undergo smooth coupling with N-tosyltryptamine in the presence of carbon−SO3H in ethanol at 80 °C to furnish the corresponding tetrahydro-β-carbolines in excellent yields with high selectivity. The coupling of tryptamine with isatins affords the respective spiro-tetrahydro-β-carbolines in good yields. The use of a recyclable solid acid catalyst makes this method simple, convenient, and cost-effective.