<i>tert</i>-Butyl Sulfoxides: Key Precursors for Palladium-Catalyzed Arylation of Sulfenate Salts
作者:Fabien Gelat、Jean-François Lohier、Annie-Claude Gaumont、Stéphane Perrio
DOI:10.1002/adsc.201500368
日期:2015.6.15
clean generation of sulfenate salts (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。