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。
ORGANOPHOSPHORUS COMPOUNDS BASED ON TETRAPHENOL (TP)-SUBSTITUTED STRUCTURES
申请人:Christiansen Andrea
公开号:US20120197025A1
公开(公告)日:2012-08-02
The invention relates to the synthesis of tetraphenol-substituted structures, in particular meta-substituted xylenes. Said tetraphenol-type structures are reacted to obtain organic phosphorus compounds, in particular organophosphites. The invention further relates to the production of catalytically active compositions which contain transition metals in addition to the aforementioned organic phosphorus compounds. According to another subject matter of the invention, said catalytically active compositions are used in chemical reactions with small molecules, e.g. HCN, CO, hydrogen, and amines.
Alcohols and Di-<i>tert</i>-butyl Dicarbonate: How the Nature of the Lewis Acid Catalyst May Address the Reaction to the Synthesis of <i>tert</i>-Butyl Ethers
exclusive products with un-delocalized isopropoxide or low-delocalized acetate ions. The metal ion influences only the reaction rate, roughly following standard parameters for calculating Lewis acidity. A reaction mechanism is supposed, and a series of experimental evidences is reported to support it. These studies allowed us to conclude that, to synthesize tert-butyl ethers, in reactions involving aliphatic
Metal ions and complexes in organic reactions. Part IX. Copper(I)-catalysed conversion of aryl halides into alkyl aryl ethers
作者:R. G. R. Bacon、S. C. Rennison
DOI:10.1039/j39690000312
日期:——
heterogeneous catalytic conditions, e.g., in solutions containing a suspension of copper(I) oxide, reaction could in some cases be diverted to nucleophilic sustitution (ArHal → ArOAlk) by operating with a substantially homogeneous liquid medium containing copper(I) salts as catalysts. In a suitably chosen reaction system, e.g., ArHal–NaOAlk–AlkOH–Cul–2,4,6-collidine, at ∼100–120°, high yields of ethers resulted
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.