Graphite oxide activated zeolite NaY: applications in alcohol dehydration
作者:Alexander D. Todd、Christopher W. Bielawski
DOI:10.1039/c2cy20474f
日期:——
zeolite NaY (Si/Al = 5.1) was used to dehydrate various alcohols to their respective olefinic products. Using conditions optimized for 4-heptanol (15 wt% GO–NaY (1 : 1 wt/wt), 150 °C, 30 min), a series of secondary and tertiary aliphatic alcohols were cleanly dehydrated in moderate to excellent conversions (27.5–97.2%). Several primary alcohols were also dehydrated, although higher catalyst loadings (200
使用氧化石墨(GO)和沸石NaY(Si / Al = 5.1)的混合物将各种醇脱水为各自的烯烃产物。使用针对以下条件优化的条件4-庚醇(15%(重量)GO-NaY(1:1重量/重量),150°C,30分钟),一系列仲和叔脂族醇以中等至出色的转化率(27.5–97.2%)干净地脱水。尽管需要更高的催化剂负载量(200 wt%GO-NaY(1:1)和更长的反应时间(3 h),但也有几种伯醇被脱水。酸性形式,不需要铵阳离子交换和/或高温煅烧。
Tunable stereoselective alkene synthesis by treatment of activated imines with nonstabilized phosphonium ylides
作者:De-Jun Dong、Yuan Li、Jie-Qi Wang、Shi-Kai Tian
DOI:10.1039/c0cc04739b
日期:——
A broad range of readily accessible N-sulfonyl imines undergo olefination reaction with nonstabilized phosphoniumylides under mild conditions to afford an array of both Z- and E-isomers of 1,2-disubstituted alkenes, allylic alcohols, and allylic amines in good yields and with greater than 99 : 1 stereoselectivity.
Stabilization of long-chain intermediates in solution. Octyl radicals and cations
作者:Aleksandar V. Teodorović、Dalibor M. Badjuk、Nenad Stevanović、Radoslav Z. Pavlović
DOI:10.1016/j.molstruc.2013.02.020
日期:2013.5
The rearrangements of 1-octyl, 1-decyl and 1-tridecyl intermediates obtained from thermal lead(IV) acetate (LTA) decarboxylation of nonanoic, undecanoic and tetradecanoic acid were investigated experimentally through analysis and distribution of the products. The relationships between 1,5-, 1,6- and possibly existing 1,7-homolytic hydrogen transfer in 1-octyl-radical, as well as successive 1,2-hydride shift in corresponding cation have been computed via Monte-Carlo method. Taking into account that ratios of 1,5-/1,6-homolytic rearrangements in 1-octyl- and 1-tridecyl radical are approximately the same, the simulation shows very low involvement of 1,7-hydrogen rearrangement (1,5-/1,6-/1,7-hydrogen rearrangement = 85:31:1) in 1-octyl radical. (C) 2013 Elsevier B.V. All rights reserved.
Huhtasaari, Matti; Schaefer, Hans J.; Luftmann, Heinrich, Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1983, vol. 37, # 6, p. 537 - 548
作者:Huhtasaari, Matti、Schaefer, Hans J.、Luftmann, Heinrich
DOI:——
日期:——
Liu, Hsing-Jang; Ho, Li-Kang, Canadian Journal of Chemistry, 1983, vol. 61, p. 632 - 634