Journal
TETRAHEDRON LETTERS
Volume 44, Issue 7, Pages 1445-1447Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(02)02860-5
Keywords
(+/-)-epi-conocarpan; cis-2,3-dihydrobenzofuran; intramolecular C-H insertion; ruthenium(II) porphyrin
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(+/-)-epi-Conocarpan 1 was synthesized via the key intermediate 5-bromo-cis-2-(4-methoxyphenyl)-3-methyl-2,3-dihydrobenzofuran 6 which was synthesized by a ruthenium(II) porphyrin-catalyzed intramolecular C-H insertion reaction using aryl tosylhydrazone salt 5 as the carbene source, starting from the commercially available 5-bromo-2-hydroxyacetophenone. (C) 2003 Elsevier Science Ltd. All rights reserved.
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