Herein we reported an efficient palladium-catalyzed enantioselective arylation of both alkyl and aryl sulfenate anions to deliver various chiral sulfoxides in good yields (up to 98%) with excellent enantioselectivities (up to 99% ee) by the use of our developed chiral O,P-ligands (PC-Phos). PC-Phos are easily prepared in shortsteps from inexpensive commercially available starting materials. The single-crystal
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.
clean generation of sulfenatesalts (R1SO−) by pyrolysis of readily available tert‐butyl sulfoxides to give sulfenic acids (R1SOH) and traceless isobutene, followed by hydrogen abstraction with a weak inorganic base (K3PO4). The relevance of this process was exemplified through an in situ palladium‐catalyzed cross‐coupling reaction with aryl halides/triflates leading to aryl sulfoxides. The operationally
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。
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。
Highly efficient rhenium-catalyzed deoxygenation of sulfoxides without adding any reducing agent
作者:Sara C.A. Sousa、Joana R. Bernardo、Carlos C. Romão、Ana C. Fernandes
DOI:10.1016/j.tet.2012.07.071
日期:2012.9
This work reports a novel method for the deoxygenation of aromatic and aliphatic sulfoxides catalyzed by oxo-rhenium complexes without adding any reducing agent. The oxo-rhenium complex ReOCl3(PPh3)2 proved to be very efficient for the deoxygenation of several sulfoxides with tolerance of different functional groups.