Metal-Free CH–CH-Type Cross-Coupling of Arenes and Alkynes Directed by a Multifunctional Sulfoxide Group
摘要:
A metal-free CH-CH-type coupling of arenes and alkynes, mediated by a multifunctional sulfoxide directing group, exploits nonprefunctionalized coupling partners, proceeds under mild conditions, is operationally simple, and exhibits high functional group tolerance. The products of the CH-CH coupling are highly versatile, and the metal-free process can be used for the construction and late-stage modification of important molecular scaffolds.
本报告描述了一种高效洁净代次磺酸的盐(R 1 SO - )通过热解容易获得的叔丁基亚砜,得到次磺酸(R 1 SOH)和无痕迹的异丁烯,随后夺氢用弱无机碱( K 3 PO 4)。该过程的相关性通过与芳基卤化物/三氟甲磺酸酯生成芳基亚砜的原位钯催化交叉偶联反应得到了例证。开发的操作简单的CS键形成协议使用Pd(dba)2作为催化剂,Xantphos作为甲苯或甲苯/ H 2中的配体O混合物。进一步的扩展包括使用二叔丁基亚砜作为一氧化硫二价阴离子(SO 2−)的等同物,并开发了[2.2]对环环烷和联芳基系列的非对映选择性形式。
Palladium-Catalyzed Arylation of Aryl Sulfenate Anions with Aryl Bromides under Mild Conditions: Synthesis of Diaryl Sulfoxides
作者:Hui Jiang、Tiezheng Jia、Mengnan Zhang、Patrick J. Walsh
DOI:10.1021/acs.orglett.6b00073
日期:2016.3.4
generated from aryl 2-(trimethylsilyl)ethyl sulfoxides and CsF has been developed. This protocol is effective for the synthesis of diaryl sulfoxides and heteroaryl aryl sulfoxides under mild conditions employing aryl bromides. Various functional groups, including those with acidic protons, are well tolerated.
Sulfoxide and Sulfone Synthesis via Electrochemical Oxidation of Sulfides
作者:Jin Kyu Park、Sunwoo Lee
DOI:10.1021/acs.joc.1c01657
日期:2021.10.1
sulfides to the corresponding sulfoxides and sulfones under electrochemical conditions is reported. Sulfoxides are selectively obtained in good yield under a constant current of 5 mA for 10 h in DMF, while sulfones are formed as the major product under a constant current of 10 or 20 mA for 10 h in MeOH. The oxygen of both the sulfoxide and sulfone function is derivedfrom water.
报道了在电化学条件下二芳基硫化物和芳基烷基硫化物氧化成相应的亚砜和砜。在 DMF 中,5 mA 恒定电流下 10 小时选择性地获得亚砜,而在 MeOH 中,10 或 20 mA 恒定电流下 10 小时形成的主要产物是砜。亚砜和砜官能团的氧均来自水。
Diaryl Sulfoxides from Aryl Benzyl Sulfoxides: A Single Palladium-Catalyzed Triple Relay Process
作者:Tiezheng Jia、Ana Bellomo、Sonia Montel、Mengnan Zhang、Kawtar EL Baina、Bing Zheng、Patrick J. Walsh
DOI:10.1002/anie.201307172
日期:2014.1.3
additional palladium‐catalyzed process. It is noteworthy that palladium‐catalyzed benzylative CS bond cleavage of sulfoxides is unprecedented. A wide range of arylbenzylsulfoxides, as well as alkyl benzylsulfoxides with various (hetero)aryl bromides were employed in the triplerelayprocess in good to excellent yields (85–99 %). Moreover, aryl methyl sulfoxides, dibenzyl sulfoxides, and dimethylsulfoxide