An efficient and convenient method for the chemoselective construction of C−S and C−N bonds via simple Michael addition was reported. Thus, by using benzothiazol‐2‐thiol/benoxazol‐2‐thiol and α, β‐unsaturated ester as starting substrates, C−S and C−N bonds could be chemoselectively constructed by addition reaction in different solvents. This protocol featured high chemoselectivity, high atomic economy, mild conditions, good functional tolerance and good to excellent yields, showing potential value for the preparation of some biologically and pharmaceutically active compounds.
Background
Post-stroke depression(PSD) is one of the most common complications of stroke which affects recovery and quality of patients’ life adversely. PSD also is a significant source of burden for caregivers. Recently, the number of publications on PSD has been an increasing worldwide that means PSD has attracted more and more attention. Therefore, a more comprehensive understanding of the publications on PSD is now required. The purpose of this paper is to analyze the research status, discover the hotspots and frontiers about PSD.
Methods
The publications’ raw data was retrieved from the Web of Science Core Collection on September 19, 2022. Impact Factor (IF) and Journal Citation Reports (JCR) segments of the publications were obtained from the Web of Science website. Visualization analysis was performed on CiteSpace and VOSviewer.
Results
From 2012 to 2022, the number of citations and publications about PSD increased exponentially year by year. Finally, a total of 3268 publications related to PSD were identified. China (867) and the US (738) had the most publications; Capital Med Univ and Univ Melbourne were the most prolific institutions. Ungvari GS and Hackett ML were the most active authors and the most prolific and co-cited, respectively. Journal of stroke cerebrovascular diseases (131 articles) was the highest output. Among the 3268 publications, International journal of stroke had the most citations (43.9 times), Stroke has the most citations (2,990) and the highest H-index value. The citation burst for 8 co-cited references lasts until 2022. Finally, this paper divided the hot spots into four categories: cluster 1 (study on risk factors of PSD), cluster 2 (clinically relevant research on PSD), cluster 3 (mechanisms of PSD), and cluster 4 (the Treatment Study for PSD).
Conclusion
PSD research is one research main area worldwide. This work demonstrated the knowledge structure and the evolution of the PSD research field and predictdresearches trends through visual analysis. The study of clinical treatment and prevention of PSD will instead of the study of the mechanism in the future. This study provides reference for future research of PSD.
An efficient and convenient synthesis of benzoxazole/benzothiazole-substituted esters in a one-pot strategy is reported. In this investigation, a selective construction of C-N and C-S bonds via simple addition is performed. Thus, using substituted 2-aminophenols/2-aminobenzenethiols, TMTD (tetramethylthiuram disulfide) and α,β-unsaturated esters as starting substrates, C-N and C-S bonds can be selectively constructed by means of the Michael addition reaction. This protocol features high selectivity, high atomic economy, mild conditions, good functional tolerance and good to excellent yields, showing the potential value for the preparation of some biologically and pharmaceutically active compounds.
The diversified synthesis of heterocyclic compounds has always been one of the popular subjects of organic chemistry. To this end, great efforts have been devoted to developing new reagents and...
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