Development and Application of O-(Trimethylsilyl)aryl Fluorosulfates for the Synthesis of Arynes
摘要:
A class of o-(trimethylsilyl)aryl fluorosulfates was synthesized by a concise method and successfully used as aryne precursors for the first time. Different trapping agents such as azides, furans, and acyl acetoacetates could successfully react with the aryne precursors under mild conditions with good to excellent yields.
The heterocyclic ionic liquid-catalyzed direct oxidative amination of benzylic sp3 C–H bonds via intermolecular sp3 C–N bond formation for the synthesis of N-alkylated azoles under metal-free conditions is reported for the first time. The catalyst 1-butylpyridinium iodide can be recycled and reused with similar efficacies for at least eight cycles.
Oxidation of 1-[(aryl)(phenylseleno)methyl]-, 1-[(aryl)(arylthio)-(phenylseleno)methyl]-, and l-[(aryl)(diphenylseleno)methyl]benzotriazoles with<i>m</i>-chloroperbenzoic acid
作者:Yoon Ho Kang、Kyongtae Kim
DOI:10.1002/jhet.5570340617
日期:1997.11
During the last decade, benzotriazole (1) has received much attention as an excellent synthetic auxiliary [1]. Recently Katritzky, et al. [2] studied the oxidation of 1-(phenylthiomethyl)benzotriazole (2a) and 1-(2-phenyl-1-phenylthioethyl)benzotriazole (2b) and obtained their sulfones and sulfoxides by treatment with wj-chloroperbenzoic acid (m-CPBA) and sodium periodate, respectively. No compounds
Convenient and Stereoselective Synthesis of Symmetrical (E)-Stilbenes via Homocoupling of 1,3-Dibenzylbenzotriazolium Bromides
作者:Xiaohui Xiao、Daqin Lin、Shuitian Tong、Hong Luo、Yinfeng He、Hailan Mo
DOI:10.1055/s-0030-1260814
日期:2011.7
Using NaH as the base and DMSO as the solvent, a series of symmetric (E)-stilbenes were prepared in good yields via the homocoupling of 1,3-dibenzylbenzotriazolium bromides at room temperature.
以 NaH 为碱基,DMSO 为溶剂,在室温下通过 1,3-二苄基苯并三唑溴化物的均偶联反应制备了一系列对称 (E)- 二苯乙烯,收率良好。
Metal-free, highly efficient organocatalytic amination of benzylic C–H bonds
A new synthetic approach toward direct CâN bond formation through sp3 CâH activation has been developed under metal-free conditions. Both primary and secondary benzylic CâH substrates could react smoothly with various amines to give only mono-amination products with good to excellent yields.
TBHP/I2-Promoted Oxidative Coupling of Azoles with Benzyl Compounds via Cleavage of Nonactivated C(sp3)-H Bonds under Solvent-Free Conditions
作者:Baohua Chen、Xiang Liu、Guiqin Yu、Jihui Li、Dong Wang、Yongxin Chen、Keqin Shi
DOI:10.1055/s-0033-1338871
日期:——
A novel and efficient TBHP/I 2 -promoted oxidative coupling of azoles with benzyl compounds via cleavage of nonactivated C(sp 3 )–H bonds under metal-free, base-free, and solvent-free conditions for the synthesis of N-alkylated azoles has been developed. The procedure, using I 2 as the catalyst, is a simple, economical, and environmentally friendly protocol, which could be applied to various available