Csp2–Csp2 bond formation via Lewis acid/ammonium salt cocatalyzed tandem addition and oxidative dehydrogenation strategy: alkenylation of indoles with α,β-unsaturated ketones
摘要:
The alkenylation of indoles with alpha,beta-unsaturated ketones through a tandem addition and oxidative dehydrogenation strategy has been developed. This method provides an alternative approach for C3 alkenylation of indoles with alpha,beta-unsaturated ketones. Using inexpensive and readily available BF3 center dot Et2O and an ammonium salt as the efficient cocatalyst constitutes the attractive advantage of this reaction. (C) 2012 Published by Elsevier Ltd.
Triethylbenzylammonium Chloride as a Useful and Efficient Catalyst for the Alkylation of Indole/substituted Indoles in Water: A Comparative Study between Conventional and Microwave Irradiation
green and facile method for the alkylation of indole/substituted indole in water using a phase Transfer catalyst (Triethylbenzylammonium Chloride, TEBA) to synthesise bis‐indolyl methanes (BIMs) and Michael addition of indole to α,β‐unsaturated carbonyl compounds is reported. The substitution of indoles occurred exclusively at the 3‐position and products of N‐alkylation has not been observed. However