Synthesis of trifluoromethyl-imines by solid acid/superacid catalyzed microwave assisted approach
作者:Mohammed Abid、Markku Savolainen、Shainaz Landge、Jinbo Hu、G.K. Surya Prakash、George A. Olah、Béla Török
DOI:10.1016/j.jfluchem.2007.01.011
日期:2007.6
deactivated substrates includes the use of a pressure vessel at 175 degrees C temperature, with solidsuperacidcatalysis. Using the solid acid K-10 montmorillonite or the superacidic perfluorinated resinsulfonic acid Nafion-H, a wide variety of trifluoromethylated imines have been synthesized using the above methods. The products have been isolated in good to excellent yields and high selectivities. This
Efficient One-Pot Synthesis of Fluorinated Benzimidazolines, Benzothiazolines, Benzoxazolines, and Dihydrobenzoxazinones Using Gallium(III) Triflate as a Catalyst
作者:G. K. Surya Prakash、Thomas Mathew、Chiradeep Panja、Habiba Vaghoo、Karthik Venkataraman、George A. Olah
DOI:10.1021/ol062562e
日期:2007.1.1
One-pot synthesis of fluorinated benzimidazolines, benzothiazolines, benzoxazolines, and dihydrobenzoxazinones was easily achieved under mild conditions in high yields and purity through gallium(III) triflate mediated condensation-cyclization. Introduction of fluorine atoms favors the formation of the five-membered heterocycles over seven-membered heterocycles. [reaction: see text].