Synthesis of three brominated enamides, analogs of natural alkaloids isolated from the Tasmanian marine bryozoan Amathia Wilson, were prepared by a sequence of reactions starting from 3-hydroxybenzaldehyde.

From the aerial part of Cuphea hyssopifolia (Lythraceae) diterpenes and flavonoids were isolated. The compounds were identified as: friedelan-3β-ol 1, ursolic acid 2, methyl gállate 3, quercetin 4, quercetin-3-O-α-rhamnopyranoside 5, 1,2,3,4,6-penta-O-galloyl-β-D-glucose 6 and manitol 7.

Synthetic procedures for the preparation of various nitrogen-, oxygen- and sulphur-containing tripodal ligands having a 1,3,5-trimethylbenzene core are reported.

4-Hydroxypyridine undergoes a smooth reaction with dialkyl acetylenedicarboxylates in the presence of triphenylphosphine (15 mol %) to produce the E/Z isomers of dialkyl 2-(4-oxopyridin-1(4H)-yl)but-2-enedioates in high yields.

An efficient protocol for the one pot regioselective synthesis of 4-bromopyrazole derivatives from 1,3-diketones, arylhydrazines and N-bromosaccharin, in the presence of silica gel supported sulfuric acid as heterogeneous catalyst, under solvent free conditions, is reported.

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En la siguiente nota se presentan dos nuevos reportes de tayra (Eira barbara) obtenidos en la Sierra Norte de Puebla.

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