Manganese-catalyzed C—C bond cleavage of cyclobutanols has attracted great attention due to the high abundance and cheap and eco-friendly behaviour.A manganese-catalyzed ring-opening C—C bond fluorination of cyclobu...Manganese-catalyzed C—C bond cleavage of cyclobutanols has attracted great attention due to the high abundance and cheap and eco-friendly behaviour.A manganese-catalyzed ring-opening C—C bond fluorination of cyclobutanols is reported.Under mild conditions,the reaction provides a straightforward access to γ-fluorinated ketones using 10 mol% Mn(OAc)_(2) as catalyst and electrophilic fluorination reagent,which was generated in situ from HF·Et 3N and PhIO,as fluorine source.The reaction has an excellent functional-group tolerance and displays a broad substrate scope,affording the corresponding products in 50%~76%yields.展开更多
This article introduces four noteworthy papers published in China's top journals in Summer 2021,all of which are phenomenon-driven and design-based case studies.The first paper employs a process tracing approach t...This article introduces four noteworthy papers published in China's top journals in Summer 2021,all of which are phenomenon-driven and design-based case studies.The first paper employs a process tracing approach to analyze the failure of policy coordination based on an empirical case regarding the revision of the price catalog for basic medical services in Province F.The second paper develops a triple mechanism framework to account for the distortions in China's grassroots policies.With a most similar case design,the third paper proposes a typology framework for campaign-style environmental governance and compares the mobilization models for environmental governance.Based on a grounded theory approach,the final paper analyzes data from thirty-eight public crises cases to reveal the mechanism of political mobilization for emergency management.These studies explain clear theoretical puzzles brought about by practical problems,and they provide a sense of the research designs in the case studies.They show three types of case studies:(1)two single case studies,one with a process tracing approach and the other illustrating a developed theoretical framework,(2)a comparative case study,and(3)a multi-case study applying a grounded theory strategy.These studies provide enlightenment and lessons for future Chinese case studies.展开更多
基金Project supported by the National Natural Science Foundation of China(Nos.92156008,22161142016)the Taishan Scholar Program at Shandong Provincethe Natural Science Foundation of Shandong Province(No.ZR2020QB018)。
文摘Manganese-catalyzed C—C bond cleavage of cyclobutanols has attracted great attention due to the high abundance and cheap and eco-friendly behaviour.A manganese-catalyzed ring-opening C—C bond fluorination of cyclobutanols is reported.Under mild conditions,the reaction provides a straightforward access to γ-fluorinated ketones using 10 mol% Mn(OAc)_(2) as catalyst and electrophilic fluorination reagent,which was generated in situ from HF·Et 3N and PhIO,as fluorine source.The reaction has an excellent functional-group tolerance and displays a broad substrate scope,affording the corresponding products in 50%~76%yields.
文摘This article introduces four noteworthy papers published in China's top journals in Summer 2021,all of which are phenomenon-driven and design-based case studies.The first paper employs a process tracing approach to analyze the failure of policy coordination based on an empirical case regarding the revision of the price catalog for basic medical services in Province F.The second paper develops a triple mechanism framework to account for the distortions in China's grassroots policies.With a most similar case design,the third paper proposes a typology framework for campaign-style environmental governance and compares the mobilization models for environmental governance.Based on a grounded theory approach,the final paper analyzes data from thirty-eight public crises cases to reveal the mechanism of political mobilization for emergency management.These studies explain clear theoretical puzzles brought about by practical problems,and they provide a sense of the research designs in the case studies.They show three types of case studies:(1)two single case studies,one with a process tracing approach and the other illustrating a developed theoretical framework,(2)a comparative case study,and(3)a multi-case study applying a grounded theory strategy.These studies provide enlightenment and lessons for future Chinese case studies.
