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
Vanadium-Catalyzed Synthesis of Geometrically Defined Acyclic Tri- and Tetrasubstituted Olefins from Propargyl Alcohols
作者:Barry M. Trost、Jacob S. Tracy
DOI:10.1021/acscatal.8b04567
日期:2019.2.1
selective formation of geometricallydefined acyclic tri- and tetrasubstituted alkenes from inexpensive and readily available propargyl alcohols is described. Through vanadium oxo catalysis, tri- and tetrasubstituted α-chloro-, bromo-, and iodo-enone olefins can be synthesized with the kinetic E-geometry. Complementary tetrasubstituted β-chloro-, bromo-, and iodo-enone olefins with Z-geometry can be
Preparation of Triazole Gold(III) Complex as an Effective Catalyst for the Synthesis of
<i>E</i>
‐α‐Haloenones
作者:Yongchun Yang、Wenkang Hu、Xiaohan Ye、Dawei Wang、Xiaodong Shi
DOI:10.1002/adsc.201600243
日期:2016.8.18
The pyridyltriazole ligand was prepared and applied as a new ligand system for the coordination towards gold(III) cations. The resulting complex showed excellent stability and effective catalytic reactivity for the Meyer–Schuster rearrangement of propargyl alcohols and sequential allene halogenation, giving α‐haloenones with excellent yields and good E/Z selectivity. More importantly, by using this
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。
Sulfonylation of Propargyl Alcohols with Sulfinamides for the Synthesis of Allenyl Sulfones
作者:Fei-Fei Zou、Zhen Luo、Yu-Ting Yang、Xin Zhuang、Chuan-Ming Hong、Zheng-Qiang Liu、Wan-Fang Li、Qing-Hua Li、Tang-Lin Liu
DOI:10.1021/acs.joc.2c01495
日期:2022.11.18
A regio- and chemoselective sulfonylation of propargyl alcohols with sulfinamides in 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) was developed. It provided straightforward and mild access to multi-substituted allenyl sulfones by using sulfinamides as the sulfonyl sources. This transformation was promoted by HFIP and did not require any catalysts or oxidants, which allowed for the successful conversion