Intramolecular C(sp<sup>3</sup>)N Coupling by Oxidation of Benzylic C,N-Dianions
作者:Jenna L. Jeffrey、Emily S. Bartlett、Richmond Sarpong
DOI:10.1002/anie.201209591
日期:2013.2.18
azacycles is reported. This reaction proceeds through the oxidation of benzylic C,N‐dianions with iodine and builds on an earlier discovery during the synthesis of the natural product lyconadin A. The current study employs conformationally unbiased substrates with less acidic CH bonds and less reactive nitrogen nucleophiles. ZnCl2 was identified as an important additive.
多么一对!据报道,分子内 C(sp 3 ) N 偶联可提供氮杂环。该反应通过用碘氧化苄型 C,N-二价阴离子进行,并建立在合成天然产物 lyconadin A 期间的早期发现的基础上。目前的研究使用具有较低酸性 C H 键和较低活性氮亲核试剂的构象无偏底物. ZnCl 2被确定为一种重要的添加剂。
Isoindolinone Synthesis: Selective Dioxane-Mediated Aerobic Oxidation of Isoindolines
作者:Pawan Thapa、Esai Corral、Sinjinee Sardar、Brad S. Pierce、Frank W. Foss
DOI:10.1021/acs.joc.8b01920
日期:2019.1.18
N-Alkyl and N-aryl-isoindolinones were prepared by a dioxane-mediated oxidation of isoindoline precursors. The transformation exhibits unique chemoselectivity for isoindonlines. A chiral tertiary (3°)-benzylic position was not racemized during oxidation, and methyl indoprofen was prepared by late stage oxidation. Mechanistic studies suggest a selective H atom transfer, which avoids many known oxidation (by-)products
An oxidative desymmetrization of isoindolines was realized by TBN initiated radical sp3 C–H activation relay (CHAR), providing a series of ω-hydroxylactams in high yields. This reaction exhibits broad substrate scope and functional group tolerance, and even N-alkyl isoindolines can be well tolerated. The mechanistic study shows that the C–H bond oxidation, dioxygen trapping and intramolecular 1,5-H
ACYLAMINO-SUBSTITUTED FUSED CYCLOPENTANECARBOXYLIC ACID DERIVATIVES AND THEIR USE AS PHARMACEUTICALS
申请人:Sanofi
公开号:US20130030008A1
公开(公告)日:2013-01-31
The present invention relates to compounds of the formula I,
wherein A, Y, Z, R
3
to R
6
, R
20
to R
22
and R
50
have the meanings indicated in the claims, which are valuable pharmaceutical active compounds. Specifically, they are inhibitors of the endothelial differentiation gene receptor 2 (Edg-2, EDG2), which is activated by lysophosphatidic acid (LPA) and is also termed as LPA
1
receptor, and are useful for the treatment of diseases such as atherosclerosis, myocardial infarction and heart failure, for example. The invention furthermore relates to processes for the preparation of the compounds of the formula I, their use and pharmaceutical compositions comprising them.