- Synthesis of benzo[b]phenanthridines and related naturally occurring 2-aryl-1,4-naphthoquinones by palladium- and copper-catalyzed coupling of organostannanes with bromoquinones
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Syntheses of phenanthroviridone, gilvocarcin BE-12406X2, antibiotic WS 5995B, and a key intermediate for the synthesis of jadomycin are described, based on palladium- and copper-catalyzed coupling reactions of sterically hindered arylstannanes
- De Frutos, Oscar,Atienza, Carmen,Echavarren, Antonio M.
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p. 163 - 171
(2007/10/03)
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- Syntheses of fenanthroviridone, gilvocarcin BE-12406X2, and antibiotic WS 599B based on the palladium and copper catalyzed coupling of organostannanes with bromoquinones
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A total synthesis of fenanthroviridone, gilvocarcin BE-12406X2, antibiotic WS 5995B is described based on the palladium and copper catalyzed coupling reaction of sterically hindered aryl stannanes with a 2-bromonaphthoquinone. Copyright (C) 199
- De Frutos, Oscar,Echavarren, Antonio M.
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p. 8953 - 8956
(2007/10/03)
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- A new convergent synthesis of WS-5995-B, an anticoccidial antibiotic from Streptomyces auranticolor
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A new synthesis of WS-5995-B, an anticoccidial antibiotic isolated from Streptomyces auranticolor is reported via the coupling reaction between 3-bromo-5,6,7,8-tetrahydrojuglone, and 3-methoxy-5-methyl anthranilic acid. A simple method for the preparation of the anthranilate 7 starting from p-toluidine by shorter sequence is reported.
- Rama Devi,Iyengar,Pardhasaradhi
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p. 2543 - 2550
(2007/10/02)
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- THE TOTAL SYNTHESIS OF THE ANTI-COCCIDIAL AGENTS WS-5995
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A total synthesis of the three anti-coccidial agents WS-5995 A, B, and C by a Diels-Alder route is described.An intramolecular lactonization involving the displacement of a chlorine atom on a napthoquinone was the key step in the synthesis of A.
- McKenzie, Thomas C.,Choi, Woo-Baeg
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p. 1523 - 1532
(2007/10/02)
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- 1,4-Naphtoquinone derivatives and their use in treating coccidiosis
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1,4-naphthoquinone derivatives represented by the following general formula: STR1 (wherein R1 represents a hydrogen atom, a hydroxy group, a lower alkoxy group or an arylthio group, R2 represents a carboxy group, an esterified carbox
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