The authors thank the Spanish Ministry of Economy and Competitiveness (MINECO) and the European Regional Develop‐ment Funds (ERDF) (CTQ2015‐63894‐P) and the Canarian Agency for Research, Innovation and the Information Society (ACIISI) (ProID2017010019 ACIISI/FEDER, EU) for financial support. S. D. H. thanks La Laguna University and Cajasiete for a pre‐doctoral contract.
An environmentally benign protocol that affords propargylic sulfones containing highly congested carbon centers from easily accessible alcohols and sulfinic acids with water as the only byproduct is reported. The reaction proceeded via an in situ dehydrative cross-coupling process by taking advantage of the synergetic actions of multiple hydrogen bonds rather than relying on an external catalyst and/or
Synthesis of Multisubstituted Allenes, Furans, and Pyrroles via Tandem Palladium-Catalyzed Substitution and Cycloisomerization
作者:Taekyu Ryu、Dahan Eom、Seohyun Shin、Jeong-Yu Son、Phil Ho Lee
DOI:10.1021/acs.orglett.6b03561
日期:2017.2.3
A palladium-catalyzed propargyl substitution reaction of propargyl acetates with indium organothiolates is developed for the synthesis of multisubstituted allenyl sulfides. This procedure can be applied to the synthesis of multisubstituted furans and pyrroles via tandem palladium-catalyzed propargyl substitution and cycloisomerization reaction in one pot.
Copper-Catalyzed 1,4-Trifluoromethylthio-Arylsulfonylation of 1,3-Enynes via the Insertion of Sulfur Dioxide
作者:Hongzhuo Song、Xuemei Zhang、Gang Chen、Xiaochun He、Zhong Lian
DOI:10.1021/acs.orglett.3c02293
日期:2023.8.11
A copper-catalyzed trifluoromethylthio-arylsulfonylation between 1,3-enynes, AgSCF3, aryldiazonium tetrafluoroborates, and SO2 (from SOgen) is presented, which could introduce sulfone, SCF3, and allene moieties into one molecule simultaneously. This strategy features mild reaction conditions, good substrate compatibility, and excellent regioselectivity. The products obtained have the potential for
提出了一种铜催化的 1,3-烯炔、AgSCF 3、芳基重氮四氟硼酸盐和 SO 2 (来自 SOgen)之间的三氟甲硫基芳基磺酰化反应,该反应可以同时将砜、SCF 3和丙二烯部分引入一个分子中。该策略具有反应条件温和、底物相容性好、区域选择性优异等特点。获得的产品有可能进一步转化为其他有价值的化合物。对反应机制的初步研究表明它可能通过自由基途径进行。值得注意的是,SOgen 被证明是这一转化中独特有效的 SO 2替代品。
Copper-catalyzed photoredox 1,4-amidocyanation of 1,3-enynes with N-amidopyridin-1-ium salts and TMSCN: Facile access to α-amido allenyl nitriles
作者:Liangfeng Yang、Liang Zeng、Yanping Zhu、Qiuan Wang、Jinheng Li
DOI:10.1016/j.cclet.2024.109685
日期:2024.11
A new 1,4-amidocyanation of 1,3-enynes with N-amidopyridin-1-ium salts and TMSCN using a copper and photoredox synergetic catalysis for producing α-amido allenyl nitriles is developed. Employing N-amidopyridin-1-ium salts as the amidyl radical precursors, the reaction enables the formation of two new bonds, one C(sp)-N bond and one C(sp)-C(sp) bond, in a single reaction step. This reaction represents