Publications by authors named "Ruilong Feng"
An efficient nickel-catalyzed direct fluorosulfonylation of vinyl bromides and benzyl bromides under mild reaction conditions has been developed for sulfonyl fluorides utilizing NaSO and NFSI as the sulfur dioxide and fluorine sources, respectively. This reaction system tolerates organic bromide compounds, such as β-styryl bromides, alkyl vinyl bromides, and benzyl bromides, to achieve corresponding sulfonyl fluorides in moderate to good yields, with convenient operation, mild conditions, broad substrate scope, good functional group compatibility, and excellent retention of configuration to vinyl bromides.
View Article and Find Full Text PDFA practical synthetic method for the synthesis of vinyl sulfonyl fluorides through copper-promoted direct fluorosulfonylation has been developed. The reaction of the vinylboronic acids with DABSO and then NFSI is performed under mild reaction conditions. This transformation efficiently affords aryl or alkyl vinyl sulfonyl fluorides with good reaction yields, exclusive -configuration, broad substrate scope, excellent compatibility, and operational simplicity.
View Article and Find Full Text PDFArticle Synopsis
- - The paper focuses on identifying weed species in densely populated crop fields using advanced image processing techniques to improve accuracy in complex environments.
- - It employs a local variance pre-processing method to enhance data quality and utilizes an optimized DenseNet network with a new Efficient Channel Attention mechanism to highlight crucial features while diminishing irrelevant background noise.
- - The resulting model achieves a high accuracy of 97.98%, outperforming several established models, thereby contributing to the potential development of intelligent weeding robots.