<i>Meta</i>- and <i>Para</i>-Difunctionalization of Arenes via a Sulfoxide−Magnesium Exchange Reaction
作者:Christian B. Rauhut、Laurin Melzig、Paul Knochel
DOI:10.1021/ol801431z
日期:2008.9.1
The aryl sulfoxide moiety (ArSO) allows an expedient two-step meta-, para-difunctionalization of readily available diarylsulfoxides. In the first step, the sulfoxide plays the role of a directing metalation group. In the second step, triggered by i-PrMgCl x LiCl, it becomes a leaving group and undergoes a regioselective sulfoxide-magnesiumexchange.
芳基亚砜部分(ArSO)可以方便地进行易得的二芳基亚砜的两步间,对二官能化。在第一步中,亚砜起着直接金属化基团的作用。在第二步中,由i-PrMgCl x LiCl触发,它成为一个离去基团,并进行区域选择性的亚砜-镁交换。
Baliah,V.; Kanagasabapathy,V.M., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1978, vol. 16, p. 810 - 814
作者:Baliah,V.、Kanagasabapathy,V.M.
DOI:——
日期:——
Method of modulating the immune response system in mammals
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0102476B1
公开(公告)日:1986-11-05
Sodium Iodide (NaI)-Catalyzed Cross-Coupling for C−S Bond Formation via Oxidative Dehydrogenation: Cheap, Direct Access to Unsymmetrical Aryl Sulfides
yields with high regioselectivity from readily available aromatic compounds and aryl/alkyl thiols, even on gramscale. To demonstrate the practicability of this reaction, two bioactive compound skeletons were synthesized in good yields. This method can also be used to late‐stage modification of curcumin.
Difunctionalisation of Arenes and Heteroarenes by Directed Metallation and Sulfoxide–Magnesium Exchange
作者:Laurin Melzig、Christian B. Rauhut、Nikolaus Naredi‐Rainer、Paul Knochel
DOI:10.1002/chem.201003657
日期:2011.5.2
The aryl sulfoxide moiety allows an expedient two‐step difunctionalisation of readily available diaryl sulfoxides. Highly functionalised 1,2,4‐trisubstituted arenes and difunctionalised heteroarenes (furans, thiophenes, benzofurans and pyridines) were prepared in a two‐step sequence, triggered by an aryl sulfoxide group. In the first step, the sulfoxide moiety acts as a metallation‐directing group