A novel access to bis-carbazole alkaloid
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Amit Chakrabarti; D.P. Chakraborty
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Article
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1989
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Elsevier Science
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French
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Where88 the preaonca of electron raleaaing ~roupa(+r) on the aromatic part and/or hetaronitrogan atom ?aciliteta Bf3-Et20 mediated intermolecular coupling of pyranocarbazolea 2( ) thereby a??ording binary pyranocarbazolea 3((1-c) in T7-35% yield, electron uithdrauing group8 (-I) prevent such couplin