Abstract The formation of carbon–carbon bonds through the functionalization of aromatic carbon–nitrogen bonds is a highly attractive synthetic strategy in the synthesis of aromatic molecules. In this paper, we report a novel aromatic carbon–nitrogen bond functionalization reaction by using a simple dearomatization strategy. Through this process para ‐substituted anilines serve as a potential aryl source in the construction of a range of functionalized aromatic molecules, such as quaternary carbon centers, α‐keto esters, and aldehydes.
Abstract Fungal communities play an essential role in soil nutrient cycling, but the mechanism of their response to soil dry–wet cycles under alternate drip irrigation (ADI) is uncertain, which limits the improvements in crop yield that can be achieved through fungal community management in controlled environmental agriculture. In this study, surface drip irrigation was used as the control (CK) to study the effects of ADI with different thresholds of irrigation (designated A50, A60, and A70) on the soil fungal community and root–fungus interactions and to analyze the contribution of root–fungus interactions to tomato yield. Compared with CK, ADI increased the tomato fine root length and specific root fork number but decreased fungal community richness while shaping fungal communities with different compositions and functional metabolisms. For example, the relative abundance of Basidiomycota in A70 was 8.73, 3.25, and 2.81 times those of CK, A50, and A60 respectively. Among the well‐defined fungal functional guilds, the fungal community of A50 was dominated by pathotroph‐saprotroph‐symbiotroph; however, that of A60 was dominated by pathotroph‐saprotroph‐symbiotroph and pathotroph‐symbiotroph, and that of A70 was dominated by pathotroph‐symbiotroph. The root–fungus interaction model showed significant one‐way direct positive effects between adjacent pairs of variables among the four variables (from tomato specific root fork number and fine root length to Basidiomycota, total nitrogen in roots and then tomato yield). These results provide insights into the possibility of regulating the fungal community by optimizing drip irrigation techniques to improve water use efficiency and tomato yield.
An anodic oxidative dearomatization reaction of 2-alkynylanilines was developed. The formed dearomatized compounds were used as versatile precursors in the synthesis of a variety of benzenoid ring multi-functionalized indoles through simple conversions.
Abstract 2‐Alkynylanilines are attractive starting materials in indole synthesis because of their ready availability. Herein, a one‐pot stepwise procedure is reported for efficient construction of multisubstituted oxocino[4,3,2‐ cd ]indoles from 2‐alkynylanilines and 2‐alkynylbenzaldoximes. The method comprises the oxidative dearomatization of 2‐alkynylanilines, the silver‐catalyzed [3+3] cycloaddition with 2‐alkynylbenzaldoximes, and subsequent thermal radical skeletal rearrangement and aromatization.
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