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Comprehensive Summary: The difunctionalization of bicyclo[1.1.0]butanes is an under‐explored transformation that accesses to moieties that are otherwise difficult to prepare. Herein, a new oxidative radical alkylarylation of N‐aryl bicyclobutyl amides with C(sp3)−H feedstocks is achieved in an atom‐economic and photocatalyst‐ and light‐free manner. This protocol follows a sequential C(sp3)–H/C(sp2)–H functionalization, providing an efficient route for diversity‐oriented synthesis of functionalized 3‐spirocyclobutyl oxindoles. In particular, a wide range of C(sp3)−H feedstocks, including ether, alcohol, amine, thioether, polychlorinated methane, silane, acetone, acetonitrile, toluene, and alkane are all suitable for the C(sp3)−H functionalization, demonstrating the broad applicability of this transformation. [ABSTRACT FROM AUTHOR]

Comprehensive Summary: A novel visible‐light‐induced radical cascade 6‐endo cyclization of dienes (N‐(2‐vinylphenyl)acryl amides) is developed utilizing α‐carbonyl bromides as alkyl reagents. This approach affords an efficient way for synthesizing six‐membered benzo‐fused lactam derivatives with chemo‐ and regio‐selectivity and good functional group tolerance. Primary, secondary, and tertiary bromides are well‐compatible with this cascade cyclization reaction. [ABSTRACT FROM AUTHOR]

The visible‐light‐induced synthesis of 5‐phosphoryl‐functionalized pyrroles has been established by eosin Y catalysis, and different electron‐donating or electron‐withdrawing group substituted secondary H‐phosphine oxides and phenacylmalononitriles showed good reactivity toward the reaction, affording the cascade phosphinoylation/cyclization products in 82–98% yields via P−C/C−N annulation. Step‐by‐step control experiments and 31P NMR tracking experiments were further performed to gain the insights of the plausible reaction mechanism and kinetic reaction process. This reaction may have implications for the construction of C(sp2)−P bonds in organophosphorus chemistry. [ABSTRACT FROM AUTHOR]

In recent years, para- quinone methides (p- QMs) have been recognized as a series of electron-deficient alkenes due to their special conjugate structure, which are widely used as the diarylmethyl motif to synthesize natural products, functional materials, and organic intermediates in organic synthesis. Due to their special thermodynamic and chemical stability, para -quinone methides have emerged as a hot research topic. The construction of diarylmethyl substituted cyclic organic molecules through the intermolecular and intramolecular cyclization of p -QMs is particularly appealing. Thus, this review aims to systematically encapsulate the cyclization reactions and possible mechanisms of p -QMs that have been studied since 2017. This review will provide researchers with fresh ideas to design and synthesize novel p -QMs-derived structures for future applications. [Display omitted] [ABSTRACT FROM AUTHOR]