Scheme 3.
Synthesis of model HAPs 3c, 5, 10, 11, and 13. i) NaH, 0.5 h, 50%; ii) NaH, 0.5 h, 10%; iii) LiHMDS, 2 h, NaI, 18 h, 49%; iv) LiHMDS, 18 h, 55%; v) K2CO3, 72 h, 47%.
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