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-tetramethylimi...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.
