✍ Scribed by Li-Rong Wen; Huai-Yuan Xie; Ming Li
No coin nor oath required. For personal study only.
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A fast, mild, and quantitative procedure for the preparation of tetrahydrobenzo[b]pyran derivatives in the presence of an easily accessible basic ionic liquid—[bmIm]OH(3‐butyl‐1‐methylimidazoliumhydroxide) as the catalyst has been developed. The ionic liquid was stable during the reaction process and could also be reused at least nine times with consistent activity. This procedure may be a practical alternative to the existing procedures to meet the need of academe as well as industries. J. Heterocyclic Chem., (2009).
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## Abstract magnified image A series of pyrimido[4,5‐__b__]quinoline and indeno[2′,1′:5,6]pyrido[2,3‐__d__]pyrimidine derivatives were synthesized __via__ the three‐component reaction of an aldehyde, 6‐aminopyrimidine‐2,4‐dione and 5,5‐dimethyl‐1,3‐cyclohexanedione or 1,3‐indanedione in ionic liqu
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