Highly Regioselective Nucleophilic Carbon−Carbon Bond Formation on Furans and Thiophenes Initiated by Pummerer-Type Reaction
作者:Shuji Akai、Norihito Kawashita、Hideharu Satoh、Yasufumi Wada、Keisuke Kakiguchi、Ikumi Kuriwaki、Yasuyuki Kita
DOI:10.1021/ol0484310
日期:2004.10.1
[reaction: see text] The reactions of (phenylsulfinyl)furans or -thiophenes with carbon nucleophiles in the presence of trifluoroacetic anhydride allowed the nucleophilic installation of carbon functional groups on the furan and thiophene nuclei with complete regioselectivity.
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。
Transition-Metal-Free Arylations of In-Situ Generated Sulfenates with Diaryliodonium Salts
作者:Hao Yu、Zhen Li、Carsten Bolm
DOI:10.1021/acs.orglett.8b03046
日期:2018.11.16
A transition-metal-free arylation of sulfenate anions generated from β-sulfinyl esters with diaryliodoniumsalts was developed. In this process, a new C–S bond is formed under mild reaction conditions providing a wide range of S,S-diaryl and S-alkyl S-aryl sulfoxides.
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