✦ LIBER ✦
A novel access to bis-carbazole alkaloids: substituent effect on the efficiency and regioselectivity in BF3-Et2O mediated intermolecular coupling of pyranocarbazole alkaloids
✍ Scribed by Amit Chakrabarti; D.P. Chakraborty
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- French
- Weight
- 332 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0040-4020
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✦ Synopsis
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 coupling undar similar experimental conditiona. Ronoaeric carbazolea OP various carbon akeletona have bean know