Convenient Synthesis of Benziodazolone: New Reagents for Direct Esterification of Alcohols and Amidation of Amines
作者:Michael T. Shea、Gregory T. Rohde、Yulia A. Vlasenko、Pavel S. Postnikov、Mekhman S. Yusubov、Viktor V. Zhdankin、Akio Saito、Akira Yoshimura
DOI:10.3390/molecules26237355
日期:——
Hypervalent iodine heterocycles represent one of the important classes of hypervalent iodine reagents with many applications in organic synthesis. This paper reports a simple and convenientsynthesis of benziodazolones by the reaction of readily available iodobenzamides with m-chloroperoxybenzoic acid in acetonitrile at room temperature. The structure of one of these new iodine heterocycles was confirmed
高价碘杂环代表了一类重要的高价碘试剂,在有机合成中有许多应用。本文通过容易获得的iodobenzamides与反应报告benziodazolones的简单且方便的合成米氯过氧苯甲酸在室温下,在乙腈中。这些新的碘杂环之一的结构通过 X 射线分析得到证实。与 PPh 3和吡啶结合,这些苯并咪唑酮可以顺利地与醇或胺反应,分别生成相应的 3-氯苯甲酸酯或酰胺。发现在该酯化反应中,新型苯并碘酮试剂比类似的苯并恶酮试剂反应更有效。
Palladium‐Catalyzed Isocyanide Insertion with Allylic Esters: Synthesis of
<i>N</i>
‐(But‐2‐enoyl)‐
<i>N</i>
‐(
<i>tert</i>
‐butyl)benzamide Derivatives
<i>via</i>
Intramolecular Acyl Transfer Termination
reaction via the palladium-catalyzed insertion of isocyanide has been established. Isocyanides were inserted into C−O bond under mild conditions, using the readily available allylester as the starting materials. In addition, the intramolecular acyl transfer from the ester group oxygen atom to the isocyanide nitrogen atom afforded imide derivatives in moderate to excellent yields. Additionally, this
formula R4N[I(O2CAr)2] is reported. These compounds are air‐ and moisture‐stable iodine(I) reagents, which were characterized including X‐ray analysis. They represent conceptually new iodine(I) reagents with anions as stabilizers. These compounds display the expected performance as electrophilic reagents upon interaction with electron‐rich substrates. The performance of these compounds in a total of
报道了通式为R 4 N [I(O 2 CAr)2 ]的亲电碘试剂的一般合成,分离和表征。这些化合物是空气和水分稳定的碘(I)试剂,其特征包括X射线分析。从概念上讲,它们代表带有阴离子作为稳定剂的新碘(I)试剂。这些化合物在与富电子底物相互作用时作为亲电子试剂显示出预期的性能。研究了这些化合物在烯烃的邻位碘加氧的总共47个不同反应中的性能,并揭示了该试剂的一些关键特征。
A facile method for hydroxytrifluoromethylation of alkenes with Langlois reagent and DMSO
作者:Wei-Guo Shen、Qing-Yan Wu、Xing-Yu Gong、Gui-Zhen Ao、Feng Liu
DOI:10.1039/c9gc00886a
日期:——
A practical hydroxytrifluoromethylation of alkenes using the Langlois reagent as the trifluoromethyl source and DMSO as the oxidant is described. This reaction is mild and operationally simple, without exclusion of either moisture or oxygen, allowing access to a wide range of β-trifluoromethyl alcohols in useful yields. This transformation is environmentally friendly and can be easily scaled up to
RADICALLY POLYMERIZABLE COMPOUND HAVING A CYCLIC DITHIOCARBONATE GROUP
申请人:Ohta Keisuke
公开号:US20090270574A1
公开(公告)日:2009-10-29
A radically polymerizable compound having a group represented by formula (1)
(In the formula, R
1
to R
3
each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, X represents an alkylene group having 1 to 4 carbon atoms.) and a radically polymerizable double bond and a composition for an optical material comprising the same have a high refractive index and excellent transparency and are hard to be oxidized in thermal curing and useful as an optical material with little tinting.