- Aryl radical cyclizations: One-pot syntheses of protoberberine and pavine alkaloids
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(equation presented) Treatment of 2-(2′-bromo-β-phenethyl)isocarbostyrils 7 with AIBN Bu3SnH in boiling benzene gave 8-oxoberbines 3 in good yields. A similar treatment of 2-(2′-bromo-β-phenethyl)isoquinolinium bromides 6 and their nor- and hom
- Orito, Kazuhiko,Satoh, Yoshitaka,Nishizawa, Hidetoshi,Harada, Rika,Tokuda, Masao
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p. 2535 - 2537
(2007/10/03)
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- From phenylacetylphenylacetic acids and 1-benzylisoquinolines to 6,11-dihydrobenzo[b]naphtho[2,3-d]furan-6,11-diones, 6H-dibenzo[c,h]chroman-6-ones and 7,12-dihydro-5H-dibenzo[c,g]chroman-5,7,12-triones via 2-phenyl-3-hydroxy-1,4-dihydro-1,4-naphthalenediones or 2-phenyl-1-naphthols
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We describe the synthesis of 6,11-dihydrobenzo[b]naphtho[2,3-d]furane-6,11-diones, 6H-Dibenzo[c,h]chroman-6-ones and 7,12-dihydro-5H-dibenzo[c,g]chroman-5,7,12-triones from 2-(2'-phenyl)-3-hydroxy-1,4-dihydro-1,4-naphthalenediones or 2-phenyl-1-naphthols obtained from 2-(2'-bromophenylacetyl)-phenylacetic acids or 1-benzylisoquinolines. (C) 2000 Elsevier Science Ltd.
- Martínez, Elena,Martínez, Luis,Treus, Mónica,Estévez, Juan C.,Estévez, Ramón J.,Castedo, Luis
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p. 6023 - 6030
(2007/10/03)
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- New, simple total syntheses of benzo[b]naphtho[2,3-d]furan-6,11-diones and benzo[b]naphtho[2,1-d]furans
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Here we account the transformation of 2-[(2'- bromophenyl)acetyl]phenylacetic acids and 1-benzylisoquinolines into benzo[b]naphtho[2,3-d]furan-6,11-diones. Synthesis of benzo[b]naphtho[2,1- d]furans from 1-benzylisoquinolines is also described.
- Martinez, Elena,Martinez, Luis,Estevez, Juan C.,Estevez, Ramon J.,Castedo, Luis
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p. 2175 - 2176
(2007/10/03)
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