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. 2021 Mar 24;6(13):9104–9111. doi: 10.1021/acsomega.1c00217

Scheme 1. Synthetic Route of the Longifolene-Derived Diacylhydrazine Compounds 5a–5v (Table 1).

Scheme 1

Reagents and conditions: (a) ZnCl2, 140.0 °C, reflux 8 h; (b) TBHP, CH3CN, CuCl2, 40.0 °C; (c) m-CPBA, Cl2Cl2, rt; and (d) EtOH, a series of different acylhydrazine compounds, 78.0 °C.