Highly Selective Formation of Cyclopentanol through Liquid-Phase Cyclopentene Hydration over MCM-22 Catalysts
作者:Duangamol Nuntasri、Peng Wu、Takashi Tatsumi
DOI:10.1246/cl.2002.224
日期:2002.2
MCM-22 catalyst exhibits an extremely high shape selectivity not observed on other zeolites of MFI, MOR and BEA structures, in that it effectively catalyzes the liquid-phase hydration of cyclopentene at a conversion up to 10% and a cyclopentanol selectivity as high as 99%.
The Reaction of Organoboranes with Lithium Salts of Trisylhydrazones of Cycloalkanones Followed by Treatment with Iodine
作者:Tsutomu Baba、Kamlakar Avasthi、Akira Suzuki
DOI:10.1246/bcsj.56.1571
日期:1983.5
The titled reaction proceeds smoothly under mild conditions to give corresponding 1-alkylcycloalkenes in excellent yields. The overall reaction provides a convenient synthetic procedure of cycloalkenes for cycloalkanones, with various alkyl substituents readily available by means of hydrobortation.
Hydrazone and Oxime Olefination via Ruthenium Alkylidenes
作者:Daniel J. Nasrallah、Troy E. Zehnder、Jacob R. Ludwig、Daniel C. Steigerwald、John J. Kiernicki、Nathaniel K. Szymczak、Corinna S. Schindler
DOI:10.1002/anie.202112101
日期:2022.5.23
Olefination of carbon–heteroatom double bonds is a powerful approach to access highly functionalized olefins. An approach is reported here that uses air-stable and commercially available rutheniumalkylidenes to promote C=N/olefin ring closure. The enabling strategy for this reaction is the use of hydrazones and oximes as readily accessible substrates that preferentially react with ruthenium alkylidenes
The synergistic effect of Cu<sup>0</sup> and Cu<sup>+</sup> for one-step synthesis of aviation biofuel from biomass-derived ketones
作者:Tan Li、Jing Su、Linjia Yin、Xiangkun Zhang、Cong Wang、Xinbao Li、Jing Zhang、Kaige Wang
DOI:10.1039/d3gc02671j
日期:——
A Cu-based catalyst was developed for one-step solvent-free synthesis of aviation biofuel from biomass-derived ketones, including acetone, cyclopentanone, cyclohexanone, and 2-pentanone. Under the optimal working conditions, the conversion rate of acetone, cyclopentanone, cyclohexanone and 2-pentanone of 100% can be achieved by using Cu/Al2O3. 79.7 c% maximum carbon yield of liquid hydrocarbons with
开发了一种铜基催化剂,用于从生物质衍生的酮(包括丙酮、环戊酮、环己酮和2-戊酮)一步无溶剂合成航空生物燃料。在最佳工况下,采用Cu/Al 2 O 3 ,丙酮、环戊酮、环己酮、2-戊酮的转化率均可达到100% 。在1.0 MPa H 2、280 ℃、2 h -1 WHSV条件下,液态烃最大碳收率为79.7 c%,航空生物燃料选择性为89.5% 。研究了焙烧温度对催化剂酸碱度以及Cu物种价态和分散度的影响。基于DFT计算和原位DRIFTS结果,Cu +上羰基的优先吸附和氢的有效解离增加了催化剂表面上H和原料的局部浓度,加速了Cu 0上占主导地位的速率决定步骤。Cu 0和Cu +的协同作用促进了航空生物燃料的形成。
Hueckel et al., Justus Liebigs Annalen der Chemie, 1930, vol. 477, p. 99,134,136