Against the backdrop of China s accelerated green development and its pursuit of the"dual carbon"goals,green finance,as a crucial instrument for the rational allocation of resources,plays a significant role ...Against the backdrop of China s accelerated green development and its pursuit of the"dual carbon"goals,green finance,as a crucial instrument for the rational allocation of resources,plays a significant role in promoting agricultural green transformation.Taking Henan Province as a case study,this research employs panel data from 18 prefecture-level cities spanning 2014 to 2023,utilizing dynamic panel models and mediating effect models for empirical analysis.The findings reveal that green finance indirectly fosters agricultural green development by driving agricultural technological progress.This promoting effect is significant,with the mediating effect accounting for 3.67%.Based on these results,policy recommendations are proposed:expanding the coverage of green finance and constructing a diversified product system;comprehensively promoting agricultural technological innovation and mechanization development;and coordinating and integrating green financial resources to facilitate agricultural green transformation tailored to local conditions.展开更多
Transition metal-catalyzed[2+2+2]cycloaddition represents a cornerstone methodology in organic synthesis.However,the cobalt-catalyzed asymmetric cycloaddition system remains underexplored despite its synthetic potenti...Transition metal-catalyzed[2+2+2]cycloaddition represents a cornerstone methodology in organic synthesis.However,the cobalt-catalyzed asymmetric cycloaddition system remains underexplored despite its synthetic potential and advantages.This work describes a cobalt-catalyzed atroposelective[2+2+2]cycloaddition/electrocyclic ring-opening cascade between 1,6-diynes and axial pre-chiral biaryl dialdehydes,to generate axially chiral conjugated diene ketones.Notably,aldehydes serve as both oxygen and carbon donors,undergoing formal double bond cleavage to forge new C=O and C=C bonds in a single catalytic cycle.The cascade transformation operates under mild,redox-neutral conditions,achieving exceptional Z/E selectivity,high enantioselectivity,and broad functional group compatibility.Mechanistic investigations combining density functional theory calculations and experimental studies suggest the involvement of a cobaltmediated[2+2+2]cycloaddition and ring-opening step in the cascade process.The deformation energy of the catalyst and substrate steric effects contributed to chiral induction.展开更多
基金Supported by Zhejiang Provincial Philosophy and Social Sciences Planning Project(23FNSQ58YB).
文摘Against the backdrop of China s accelerated green development and its pursuit of the"dual carbon"goals,green finance,as a crucial instrument for the rational allocation of resources,plays a significant role in promoting agricultural green transformation.Taking Henan Province as a case study,this research employs panel data from 18 prefecture-level cities spanning 2014 to 2023,utilizing dynamic panel models and mediating effect models for empirical analysis.The findings reveal that green finance indirectly fosters agricultural green development by driving agricultural technological progress.This promoting effect is significant,with the mediating effect accounting for 3.67%.Based on these results,policy recommendations are proposed:expanding the coverage of green finance and constructing a diversified product system;comprehensively promoting agricultural technological innovation and mechanization development;and coordinating and integrating green financial resources to facilitate agricultural green transformation tailored to local conditions.
基金supported by the National Key R&D Program of China(2024YFA1509704)the National Natural Science Foundation of China(22471034,22193012,22201033)+1 种基金the Natural Science Foundation of Jilin Province(20230101047JC,YDZJ202201ZYTS338)the Fundamental Research Funds for the Central Universities。
文摘Transition metal-catalyzed[2+2+2]cycloaddition represents a cornerstone methodology in organic synthesis.However,the cobalt-catalyzed asymmetric cycloaddition system remains underexplored despite its synthetic potential and advantages.This work describes a cobalt-catalyzed atroposelective[2+2+2]cycloaddition/electrocyclic ring-opening cascade between 1,6-diynes and axial pre-chiral biaryl dialdehydes,to generate axially chiral conjugated diene ketones.Notably,aldehydes serve as both oxygen and carbon donors,undergoing formal double bond cleavage to forge new C=O and C=C bonds in a single catalytic cycle.The cascade transformation operates under mild,redox-neutral conditions,achieving exceptional Z/E selectivity,high enantioselectivity,and broad functional group compatibility.Mechanistic investigations combining density functional theory calculations and experimental studies suggest the involvement of a cobaltmediated[2+2+2]cycloaddition and ring-opening step in the cascade process.The deformation energy of the catalyst and substrate steric effects contributed to chiral induction.
