%0 Journal Article
%T An Alternative Synthetic Access to cis-4a-Methyloctahydrophenanthrene, a Biomarker of Sergipe-Alagoas Basin Petroleum in Brazil
%A Rodrigues
%A Denise C.
%A Meijere
%A Armin de
%A Marsaioli
%A Anita J.
%J Journal of the Brazilian Chemical Society
%D 2002
%I Sociedade Brasileira de Qu¨Şmica, SBQ
%R 10.1590/S0103-50532002000500020
%X cis-4a-methyloctahydrophenanthrene (1) was prepared in 8 steps (23% overall yield) from 2-bromophenyl)acetic acid (3) and cyclohexane-1,3-dione (6). a highly cis-diastereoselective michael-type heck coupling served as the key step in the assembly of the tricyclic skeleton. this compound 1 was used as gas chromatography standard which allowed the unequivocal identification of a minor biomarker present in carmopolis oil from the sergipe-alagoas basin in brazil.
%K cis-4a-methyloctahydrophenanthrene
%K biomarker
%K carmopolis petroleum
%K sergipe-alagoas basin.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532002000500020&lng=en&nrm=iso&tlng=en