A Brønsted Acid Catalyzed Cascade Reaction for the Conversion of Indoles to α‐(3‐Indolyl) Ketones by Using 2‐Benzyloxy Aldehydes
作者:Ankush Banerjee、Modhu Sudan Maji
DOI:10.1002/chem.201902268
日期:2019.9.2
A Brønstedacid catalyzed, operationally simple, scalable route to several functionalized α-(3-indolyl) ketones has been developed and the long-standing regioisomeric issue has been eliminated by choosing appropriate carbonyls. A readily available and cheap bottle reagent was used as the catalyst. This protocol was also applicable to the synthesis of densely functionalized α-(3-pyrrolyl) ketones. A
Total Synthesis of Marine Alkaloid Hyellazole and its Derivatives
作者:Suchandra Chakraborty、Chandan Saha
DOI:10.1002/ejoc.201800187
日期:2018.5.8
The synthesis of the marine alkaloid hyellazole, based on a carbazole moiety, was achieved by means of classic Fischer indole cyclization with a synthesized appropriately substituted bromoaniline and subsequent use of Suzuki–Miyaura cross‐coupling with phenylboronic acid in the presence of a palladium catalyst.
Synthesis of carbazoles related to carbazomycin, hyellazole and ellipticine.
作者:Jan Bergman、Benjamin Pelcman
DOI:10.1016/s0040-4020(01)86029-4
日期:1988.1
2-disubstituted carbazoles are described. The first involves condensation of 2-alkyl-substituted indoles with 2,3-unsaturated ketones in the presence of Pd/C and molecular sieves, the second is based on the reaction of a 2-vinylic indole with the Vilsmeier reagent. The vinylic indoles were prepared by a Fischer indole synthesis, or via 1-benzenesulphonyl-2-lithioindole.