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A variety of 2-amino-3-cyano-5-oxo-4-perfluoroalkyl-5,6,7,8-tetrahydro-4H-chromene derivatives were achieved via a one-pot, three-component reaction from easily available methyl 2-perfluoroalkynoate, malononitrile (or ethyl cyanoacetate), and diverse cyclic 1,3-diketones. Moderate to good yields (up to 93%) were obtained in the presence of catalytic methylamine. This process went through a tandem...
The synthesis of 2-perfluoroalkylated benzoxazolines and benzothiazolines was easily achieved under mild conditions in high yields and purity. The protocol uses readily available methyl 2-perfluoroalkynoates as fluorine-containing building block, and furnished the expected product in good to excellent yields in MeOH under reflux for 10h. This novel synthetic protocol is efficient and general. A plausible...
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