Abstract

CASTRO MANDUJANO, Olivio; PASTOR DE ABRAM, Ana  and  COLLANTES DIAZ, Ingrit E.. Isolation of the usnic acid and parietin of the Caloplaca saxicola Hoffm. Rev. Soc. Quím. Perú [online]. 2011, vol.77, n.2, pp.152-161. ISSN 1810-634X.

In the present work there was investigated the Caloplaca saxicola (Hoffm.), gathered near Chinchaycocha's lagoon (Carhuamayo - Cerro de Pasco), to an altitude of 4100 msnm. To 240 grams sample, it surrendered to an extraction acetonic for maceration; one separated diverse components of the extract, using the chromatography in column, with the system chloroform - acetone increasing the quantity of acetone; then, the obtained fractions they purified using chromatographic techniques and recrystallizations. Finally, they were elucidated and there decided the structures of the obtained solids, analyzing his spectra of IR, H¹NMR, C¹³NMR, and MS; these are: usnic acid and parietin.

Keywords : Lichen; Caloplaca saxicola; usnic acid; parietin.

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