Cross-coupling of 1,1-difluoro-1-en-3-yn-2-yl tosylates with arylboronic acids: A new approach to 2-aryl-1,1-difluoro-1,3-enynes
作者:Su Jin Kim、Hyun Gyu Ryu、Sung Lan Jeon、In Howa Jeong
DOI:10.1016/j.jfluchem.2016.08.014
日期:2017.4
The palladium-catalyzed direct alkynylation of 2,2-difluoro-1-tributylstannylethenyl p-toluenesulfonate 1 with alkynyl bromides provided the corresponding 1,1-difluoro-1,3-enynyl tosylates 2 in good yields. The Suzuki-Miyaura arylation reaction of 2 with arylboronicacids afforded the cross-coupled products, 2-aryl-1,1-difluoro-1,3-enynes 3, in good yields.
Preparation of (2,2-difluoroethenylidene)bis(tributylstannane) and arylation reaction: efficient approach to 1,1-diaryl-2,2-difluoroethenes
作者:Seung Yeon Han、Hyo Young Lee、Jong Hee Jeon、In Howa Jeong
DOI:10.1016/j.tetlet.2012.01.127
日期:2012.4
Reaction of 2,2-difluoro-1-tributylstannylethenyl p-toluenesulfonate (1) with bis(tributyltin) in the presence of 5 mol % Pd(PPh3)4 and 30 equiv LiBr in THF at reflux temperature for 7 h afforded (2,2-difluoroethenylidene)bis(tributylstannane) (2) in a 70% yield. Coupling reaction of 2 with aryl iodides in the presence of 5 mol % Pd(PPh3)4 and 5 mol % CuI in DMF at 80 °C for 3–4 h provided the coupled
Efficient Synthesis of 2,2-Diaryl-1,1-difluoroethenes via Consecutive Cross-Coupling Reactions of 2,2-Difluoro-1-tributylstannylethenyl <i>p</i>-Toluenesulfonate
作者:Seung Yeon Han、In Howa Jeong
DOI:10.1021/ol1024037
日期:2010.12.3
2,2-Difluoro-1-tributylstannylethenyl p-toluenesulfonate (2) was reacted with aryl iodides in the presence of 10 mol % of Pd(PPh3)4 and 10 mol % of CuI in DMF at 80 °C for 10−20 h to give the cross-coupled products 3 in 35−97% yields. Further coupling reaction of 3 with arylstannanes in the presence of 5 mol % of Pd(PPh3)4 and 3 equiv of LiBr in DMF at 100 °C for 2−24 h afforded the desired products
Cross‐Electrophile Coupling between Aryl/Vinyl Triflates and Vinyl Tosylates for the Synthesis of
<i>gem</i>
‐Difluoroalkenes via Ni/Pd Cooperative Catalysis
作者:Baojian Xiong、Yue Li、Jinyu Zhang、Jiangjun Liu、Xuemei Zhang、Zhong Lian
DOI:10.1002/adsc.202101388
日期:2022.3
A dual nickel-/palladium-catalyzed direct gem-difluorovinylation of readily available aryl/vinyltriflates with substituted gem-difluorovinyl tosylates is presented. This protocol affords various diaryldifluoroalkene, arylalkyldifluoroalkene and 1,1-difluoro-2-substituted-1,3-dienes under mild reaction conditions with excellent functional group compatibility, and provides a potential pathway to the