European Journal of Organic Chemistry p. 3469 - 3474 (2005)
Update date:2022-08-03
Topics:
Ahmed, Zafar
Albrecht, Uwe
Langer, Peter
Calycine and analogues were prepared on the basis of Suzuki cross-coupling reactions of γ-alkylidene-α-hydroxybutenolides - readily available by cyclization of 1,3-dicarbonyl dianions or 1,3-bis(silyl enol ether)s with oxalyl derivatives - and subsequent boron tribromide-mediated lactonization. Leprapinic acid was prepared by chemoselective boron tribromide-mediated deprotection of permethylated leprapinic acid. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.
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