Highly Enantioselective Cascade Reaction Catalyzed by Squaramides: the Synthesis of CF<sub>3</sub>‑Containing Chromanes
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A catalytic asymmetric method for the synthesis of 2-CF3 chromanes has been described. Generally, the squaramide-catalyzed cascade reaction of 2-hydroxychalcones with β-CF3-nitroalkenes gave the CF3-containing heterocyclic compounds bearing three contiguous stereogenic centers in excellent yields, diastereoselectivities, and enantioselectivities.
创建时间：
2016-02-13
