Abstract
The extracts from leaves of Ocotea catharinensis Mez (Lauraceae) were found to contain fourteen neolignans and two sesquiterpenes: nine benzofuran types (including three new compounds 1e, 2f and 4b), one new seco-benzofuran type (3b), two bicyclo[3.2.1]octane types (including the new compound 5c), two new dimers of bicyclo[3.2.1]octane type (7a and 7b) and two sesquiterpenes (including a new humulanol 9). In addition, seven neolignans were also showed to occur in somatic embryos of O. catharinensis including one new bicyclo[3.2.1]octane type (4a).
Highlights
Ocotea catharinensis (Lauraceae) is a woody plant species found in southern Atlantic forest in Brazil, which produces excellent quality of timber
This work describes the isolation and characterization of major secondary compounds from leaves collected at Vale do Itajaí, Santa Catarina State, Brazil and from embryogenic cultures developed from the same plant source
The defatted fraction of hexane extracts from O. catharinensis leaves and from O. catharinensis somatic embryos were submitted to flash chromatography followed by prep
Summary
Ocotea catharinensis (Lauraceae) is a woody plant species found in southern Atlantic forest in Brazil, which produces excellent quality of timber. All the 1H NMR data was similar to that of a neolignan 3a (C H O ) previously isolated The compounds 4a and 4b were characterized as hexahydrobenzofuran neolignans by analysis of their 1H and 13C NMR spectra and comparison with 4c which was previously isolated from O. porosa.[9] The aromatic rings were determined as 3,4-methylenedioxyphenyl and 5-methoxy3,4-methylenedioxyphenyl for 4a and 4b, respectively. Compounds 7a and 7b had their structures determined by analysis of their IR, MS and NMR spectra.
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