A novel method for HDDA-derived benzyne trapped by nitrone was developed.This research described a simple and efficient pathway for the synthesis of benzisoxazoles from arynes and PTIO(2-phenyl-4,4,5,5-tetramethylimid...A novel method for HDDA-derived benzyne trapped by nitrone was developed.This research described a simple and efficient pathway for the synthesis of benzisoxazoles from arynes and PTIO(2-phenyl-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl),C-C and C-O bonds were formed in a single step without catalyst under mild conditions.The unexpected cleavage of C-N bond contributed to the formation of isoxazole ring,as indicated by DFT studies.Furthermore,we obtained the structure of benzoxazolopyrrolidine when the trapping agent is DMPO(5,5-dimethyl-1-pyrroline N-oxide).展开更多
为贯彻落实乡村振兴战略,落实国家广播电视总局“智慧广电乡村工程”,本文创新提出了网络电视/地面数字电视/模拟电视三前端(HDDA,High Definition Digital Analog)方案,将广电单向和双向模式结合在一起,取消了机顶盒,大大降低了光纤到...为贯彻落实乡村振兴战略,落实国家广播电视总局“智慧广电乡村工程”,本文创新提出了网络电视/地面数字电视/模拟电视三前端(HDDA,High Definition Digital Analog)方案,将广电单向和双向模式结合在一起,取消了机顶盒,大大降低了光纤到户的入户成本,能够高速低成本地完成广电乡村振兴的光纤覆盖接入。论文详细介绍了HDDA方案的系统建设、技术优势及不同场景中的实现方法。展开更多
This study presents a facile strategy for the formation of highly substituted butterfly 1,4-adducts/9,10-adducts via the Diels-Alder reaction of benzyne intermediates.The method achieves very good to excellent yields ...This study presents a facile strategy for the formation of highly substituted butterfly 1,4-adducts/9,10-adducts via the Diels-Alder reaction of benzyne intermediates.The method achieves very good to excellent yields of the respective anthracene derivative s under mild conditions.This practical protocol is compatible with a variety of sensitive functional groups and provides access to difunctionalized bridge 1,4-adducts/9,10-adducts.展开更多
基金the National Natural Science Foundation of China(No.22071001)The Research Culture Funds of Anhui Normal UniversityDepartment of Human Resources of Anhui Province for financial support。
文摘A novel method for HDDA-derived benzyne trapped by nitrone was developed.This research described a simple and efficient pathway for the synthesis of benzisoxazoles from arynes and PTIO(2-phenyl-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl),C-C and C-O bonds were formed in a single step without catalyst under mild conditions.The unexpected cleavage of C-N bond contributed to the formation of isoxazole ring,as indicated by DFT studies.Furthermore,we obtained the structure of benzoxazolopyrrolidine when the trapping agent is DMPO(5,5-dimethyl-1-pyrroline N-oxide).
文摘为贯彻落实乡村振兴战略,落实国家广播电视总局“智慧广电乡村工程”,本文创新提出了网络电视/地面数字电视/模拟电视三前端(HDDA,High Definition Digital Analog)方案,将广电单向和双向模式结合在一起,取消了机顶盒,大大降低了光纤到户的入户成本,能够高速低成本地完成广电乡村振兴的光纤覆盖接入。论文详细介绍了HDDA方案的系统建设、技术优势及不同场景中的实现方法。
基金the National Natural Science Foundation of China(Nos.21572002,21272005)The Research Culture Funds of Anhui Normal UniversityDepartment of Human Resources of Anhui Province for financial support。
文摘This study presents a facile strategy for the formation of highly substituted butterfly 1,4-adducts/9,10-adducts via the Diels-Alder reaction of benzyne intermediates.The method achieves very good to excellent yields of the respective anthracene derivative s under mild conditions.This practical protocol is compatible with a variety of sensitive functional groups and provides access to difunctionalized bridge 1,4-adducts/9,10-adducts.
