Unusual and Unexpected Reactivity of <i>t-</i>Butyl Dicarbonate (Boc<sub>2</sub>O) with Alcohols in the Presence of Magnesium Perchlorate. A New and General Route to <i>t-</i>Butyl Ethers
[reaction: see text] A new mild method for protecting alcohols as t-butylethers is reported. The reaction proceeds with Mg(ClO4)2 and Boc2O and shows general applicability. The deprotection of t-butylethers has also been revisited. Preliminary results indicate the CeCl3 x 7H2O/NaI system is a very suitable catalyst for their removal.
[反应:见正文]据报道,一种新的温和的保护叔丁醚醇的方法。反应与Mg(ClO4)2和Boc2O进行,显示出一般的适用性。也已经重新考虑了叔丁基醚的脱保护。初步结果表明,CeCl3 x 7H2O / NaI体系是非常适合去除它们的催化剂。
Methylation of arenes via Ni-catalyzed aryl C–O/F activation
作者:Bing-Tao Guan、Shi-Kai Xiang、Tao Wu、Zuo-Peng Sun、Bi-Qin Wang、Ke-Qing Zhao、Zhang-Jie Shi
DOI:10.1039/b718998b
日期:——
Aryl CâO and CâF can be transformed into CâMe viaNi-catalyzed coupling with MeMgBr under mild conditions.
芳基C–O和C–F可以在温和条件下通过Ni催化与MeMgBr的耦合反应转化为C–Me。
Conversion of Phenols into Aryl Tert-Butyl Ethers Under Mitsunobu Conditions Utilizing Neighboring Group Contribution
作者:Annette Wolfgardt、Franz Bracher
DOI:10.2174/1570178611310010003
日期:2013.2.1
Under Mitsunobu conditions N-Boc-2-(hydroxymethyl)piperidine acts as a source of tert-butyl residue for the
conversion of phenols into aryl tert-butyl ethers under neutral conditions. This reactivity can be attributed to a neighboring
group contribution which strongly depends on the structure of the employed N-Boc-aminoalcohol. Five other, closely
related N-Boc-aminoalcohols investigated here did not show this special reactivity, and gave the regular Mitsunobu coupling
products.
Ether Compounds for Treatment of Complement Mediated Disorders
申请人:Achillion Pharmaceuticals, Inc.
公开号:US20150239920A1
公开(公告)日:2015-08-27
Compounds, methods of use, and processes for making inhibitors of complement factor D comprising Formula I, or a pharmaceutically acceptable salt or composition thereof wherein R
12
or R
13
on the A group is an ether (R
32
) are provided. The inhibitors described herein target factor D and inhibit or regulate the complement cascade at an early and essential point in the alternative complement pathway, and reduce factor D's ability to modulate the classical and lectin complement pathways. The inhibitors of factor D described herein are capable of reducing the excessive activation of complement, which has been linked to certain autoimmune, inflammatory, and neurodegenerative diseases, as well as ischemia-reperfusion injury and cancer.
Disclosed herein are compounds of Formula (I) that include a sulfonate ester, ester or ether group. Compounds of Formula (I) can be included in pharmaceutical compositions, and can be used to treating and/or ameliorating a disease or condition, such as cancer, a microbial disease and/or inflammation.