本文描述了C–N键断裂反应场与Catellani–Lautens反应系统之间交叉研究的案例。使用该策略合成了一系列高度官能化的C4-取代的吲哚。通过筛选胺的烷基,可减少C–N键断裂反应的能垒,并避免了相应的变态反应产物。最后,密度泛函理论计算表明,惰性C–N键活化反应不是协同过程。相反,偶联反应首先生成吲哚季铵盐,然后通过S N 2过程发生C–N键断裂。
O<sub>2</sub>-Mediated Oxidation of Aminoboranes through 1,2-N Migration
作者:Marian Rauser、Daniel P. Warzecha、Meike Niggemann
DOI:10.1002/anie.201803168
日期:2018.5.14
In analogy to the classical reaction of C−B bonds with peroxides, the first oxidative functionalization of aminoboranes through a 1,2‐N migration was realized. Readily available aliphaticnitrocompounds are thereby transformed into N‐ and O‐functionalized hydroxylamines in a single synthetic operation. Addition of hazardous peroxides is avoided. Instead, the insertion of O2, as the terminal oxidant
Selective C(sp
<sup>3</sup>
)−N Bond Cleavage of
<i>N</i>
,
<i>N</i>
‐Dialkyl Tertiary Amines with the Loss of a Large Alkyl Group via an S
<sub>N</sub>
1 Pathway
alkyne-tethered aryl iodides with tertiary hydroxylamines has been developed for the rapid assembly of 3,4-fused tricyclic indoles with a removable aliphatic N-substituent. This domino reaction was realized by alkyne-directed palladacycle formation, electrophilic amination with tertiary hydroxylamines and selective C(sp3)−N bond cleavage with the loss of the larger alkyl group via an SN1 path.
已经开发了一种新型 Pd 0催化的 [2+2+1] 炔烃连接芳基碘化物与叔羟胺的环化反应,用于快速组装具有可去除脂肪族N取代基的 3,4-稠合三环吲哚。这种多米诺骨牌反应是通过炔烃定向的钯环形成、叔羟胺的亲电胺化和选择性 C(sp 3 )-N 键断裂以及通过 S N 1 路径损失更大的烷基来实现的。
Management of ophthalmologic disorders, including macular degeneration
申请人:Rando R. Robert
公开号:US20060069078A1
公开(公告)日:2006-03-30
A drug may be used in the preparation of a medicament for the treatment or prevention of an ophthalmologic disorder, wherein the drug inihibits, antagonizes, or short-circuits the visual cycle at a step of the visual cycle that occurs outside a disc of a rod photoreceptor cell.
Management of Ophthalmologic Disorders, Including Macular Degeneration
申请人:Rando Robert R.
公开号:US20080176952A1
公开(公告)日:2008-07-24
A drug may be used in the preparation of a medicament for the treatment or prevention of an ophthalmologic disorder, wherein the drug inhibits, antagonizes, or short circuits the visual cycle at a step of the visual cycle that occurs outside a disc of a rod photoreceptor cell.
An efficient catalytic asymmetric dearomatizing amination of 2-naphthols and phenols catalyzed by N,N′-dioxide-copper(I) complex as a chiral catalyst was presented. A variety of optically active β-naphthalenone compounds with a nitrogen-containing quaternary carbon stereocenter were obtained with high yield and enantioselectivity under mild reaction conditions. Mechanistic studies indicated that this