The HS-cellulose sulfonate catalysed green and efficient one-step synthesis of xanthene and dihydroquinazolinone derivatives.

Sodium superionic conductor (NASICON)-type electrolytes with high ionic conductivity and moisture/air stability are essential for solid-state batteries. However, they generally suffer from poor electrochemical stability and insufficient contact against Li metal, causing severe performance degradation. To address this challenge, an ionic conductive metal–organic framework (MOF)-incorporated polymeric layer (denoted as ZCPL) is prepared and used as the coating layer of Li1.5Al0.5Ge1.5(PO4)3 (LAGP). As a protective layer, ZCPL can effectively prevent the redox reaciton between LAGP and Li metal, eliminating the formation of detrimental interphases and cracks upon battery cycling. The adhesive ZCPL can also infiltrate into the void/gaps of the LAGP surface, generating a firm connection with intimate contact. Besides, ZCPL with good ionic conductivity and a soft texture provides rich pathways for fast Li+ transport and ensures a uniform Li+ flow through the interface. Benefiting from ZCPL, both the Li symmerical cell and Li/LiFePO4 full cell show long-term cycling stability.

Among the famous Daphniphyllum alkaloids family, the calyciphylline A-type subfamily has triggered particular interest from the organic synthesis community in recent years. Here, we report divergent total syntheses of three calyciphylline A-type alkaloids, namely, (−)-10-deoxydaphnipaxianine A, (+)-daphlongamine E, and (+)-calyciphylline R. Our work highlights an efficient, divergent strategy via late-stage divinyl carbinol rearrangements, including an unprecedented oxidative Nazarov electrocyclization using an unfunctionalized tertiary divinyl carbinol and an unusual allylic alcohol rearrangement. A highly efficient “donor–acceptor” platinum catalyst was used for a critical nitrile hydration step. Moreover, the power of selective amide reductions has also been showcased by novel and classic tactics.

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