Enantioselective Synthesis of 4H‐Pyrans Through Organocatalytic Asymmetric Formal [3+3] Cycloadditions of 2‐(1‐Alkynyl)‐2‐alken‐1‐ones with β‐Keto Esters
作者： Zhenting Yue , Wenbo Li , Lu Liu , Cuihong Wang , Junliang Zhang
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摘要: … the yne-enone scope of the asymmetric [3+3] cycloaddition under the optimal reaction conditions (Table 2). Benzyl 3-oxobutanoate 2a reacted with a variety of yne-enones 1 with …
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