Bu4NI-Catalyzed CO Bond Formation by Using a Cross-Dehydrogenative Coupling (CDC) Reaction
作者:Long Chen、Erbo Shi、Zhaojun Liu、Shulin Chen、Wei Wei、Hong Li、Kai Xu、Xiaobing Wan
DOI:10.1002/chem.201100192
日期:2011.4.4
crème de la crème! A practical and simple Bu4NI‐catalyzed CO bondformation was achieved by using a cross‐dehydrogenative coupling (CDC) reaction with tert‐butyl hydroperoxide (TBHP) as the ultimate oxidant (see scheme; R1=aryl, heteroaryl, alkyl; R2, R3=alkyl, alkyl halide). This approach is the most straightforward method to date for the synthesis of α‐acyloxy ethers. A plausible mechanism has been proposed
奶油!通过使用叔丁基过氧化氢(TBHP)作为最终氧化剂的交叉脱氢偶联(CDC)反应,实现了实用且简单的Bu 4 NI催化的CO键形成(参见方案; R 1 =芳基,杂芳基,烷基; R 2,R 3=烷基,烷基卤)。该方法是迄今为止合成α-酰氧基醚的最直接方法。已经提出了一种合理的机制。
Ultrasound-promoted synthesis of a copper–iron-based catalyst for the microwave-assisted acyloxylation of 1,4-dioxane and cyclohexene
作者:Pablo Macías-Benítez、Alfonso Sierra-Padilla、M. Pilar Yeste、José María Palacios-Santander、Laura Cubillana-Aguilera、José M. Gatica、Hilario Vidal、Francisco M. Guerra、F. Javier Moreno-Dorado
DOI:10.1039/d2ob02117j
日期:——
A copper–iron-based catalyst has been prepared by a low-temperature co-precipitation and sonication method. The use of high-energy ultrasound reduces the time required for the preparation process from one workweek to one day with respect to the catalysts obtained by conventional coprecipitation and thermal treatment methods. The resulting material has been characterized at compositional, textural, structural
Unexpected Copper-Catalyzed Aerobic Oxidative Cleavage of C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Bond of Glycol Ethers
作者:Zhong-Quan Liu、Lixing Zhao、Xiaojie Shang、Zili Cui
DOI:10.1021/ol301220s
日期:2012.6.15
An unexpected Cu-catalyzed oxidative cleavage of the C(sp(3))-C(sp(3)) bond in glycol ethers by using air or molecular oxygen as the terminal stoichiometric oxidant is demonstrated. As a result, the corresponding alpha-acyloxy ethers and formates of 1,2-ethanediol are formed by direct coupling of carboxylic acids and aldehydes with glycol ethers under the reaction conditions. This method represents the first example of Cu-catalyzed aerobic cleavage of saturated C-C bond in ethers.