Säurekatalysierte Umlagerung von 4-Allyl-cyclohex-2-en-1-olen; Beispiele für ladungskontrollierte [3<i>s</i>, 4<i>s</i>]-Umlagerungen von cyclischen Allylkationen
The acid-catalysedrearrangement of the cyclohex-2-en-1-ols 15, d3-15, 16, 17 and 19, the cyclohexa-2,5-dien-1-ols 20 and 21, and also the allyl alcohols 22 and 23 (Scheme 3), using 98-percent sulfuric acid/acetic anhydride 1:99 at room temperature, was investigated. From the rearrangement of 4-allyl-4-phenyl-cyclohex-2-en-1-ol (15), with reaction times greater than 2 hours a single product is obtained
的酸催化的重排的环己-2-烯-1-醇15,d 3 - 15,16,17和19中,环己-2,5-二烯-1-醇20和21,并且还烯丙基醇在室温下使用98%的硫酸/乙酸酐(1:99)研究了图22和23(方案3)。通过4-烯丙基-4-苯基-环己-2-烯-1-醇的重排(15),反应时间大于2小时,可以得到单一产物4-烯丙基-联苯(50),产率为33% (方案9)。低于2小时乙酸反应时间53从隔离了15个,可以将其转换为50个。2',3',3'-d 3 -15在Ac 2 O / H 2 SO 4中的反应导致1',1',2'-d 3 -50(方案11)。4-烯丙基-4-甲基-环己-2-烯-1-醇的重排(16)(方案14)产生39%的相应乙酸盐60和30%的4-烯丙基-甲苯(6)结果是在反应条件下重排60。这些重排均为[3s,4s]-σ反应,其通过环己烯基阳离子a进行(方案12,R = C 6 H 5,CH
Lanthanide-Catalyzed Tandem Addition of Amines to Cyanoalkenes: Synthesis of Cyclic Amidines
作者:Jinsong Hou、Gaosheng Yang、Zhuo Chai
DOI:10.1021/acs.joc.1c02481
日期:2022.1.7
A tandem insertion of aliphatic nitriles and unactivated alkenes to the N–H bond of secondary aliphatic amines catalyzed by simple trialkyl rare-earth metal complexes was disclosed. This reaction provides a highly atom-economic and stereoselective way to a range of cyclic amidines under mild reaction conditions.
Indane derivative and perfumery composition comprising the same
申请人:KAO Corporation
公开号:US04959349A1
公开(公告)日:1990-09-25
Indane derivatives useful as fragrance-imparting components are disclosed. The represented indane derivatives by the formula (I), ##STR1## wherein ring A is a benzene or cyclohexane ring and R.sup.1 is a hydrogen atom, an alkyl group having 1-4 carbon atoms, or an alkanoyl group having 1-6 carbon atoms, provided that when ring A is benzene, R.sup.1 is a group other than hydrogen atom.
Green Organocatalytic Synthesis of Indolines and Pyrrolidines from Alkenes
作者:Alexis Theodorou、Christoforos G. Kokotos
DOI:10.1002/adsc.201601262
日期:2017.5.2
efficient 2,2,2‐trifluoroacetophenone‐catalyzed oxidation of alkenes, which utilizes H2O2 as the green oxidant, a novel and sustainable synthesis of indolines and pyrrolidines was developed. This constitutes a cheap, general and environmentally‐friendly protocol for the synthesis of substituted nitrogen‐containing heterocycles. A variety of substitution patterns, both aromatic and aliphatic moieties, are well
利用绿色,高效的2,2,2-三氟苯乙酮催化的烯烃氧化,利用H 2 O 2作为绿色氧化剂,开发了新颖且可持续的二氢吲哚和吡咯烷的合成方法。这构成了用于合成取代的含氮杂环的廉价,通用且环境友好的方案。芳香族和脂肪族部分的各种取代方式都具有良好的耐受性,从而以良好至极佳的收率产生了所需的氮杂环。
Mild, Rhodium-Catalyzed Intramolecular Hydroamination of Unactivated Terminal and Internal Alkenes with Primary and Secondary Amines
作者:Zhijian Liu、John F. Hartwig
DOI:10.1021/ja710126x
日期:2008.2.6
We report a series of mild, rhodium-catalyzedhydroaminations of unactivated olefins with primary and secondary alkylamines to form the corresponding five- and six-membered products in excellent yields. The reactions form exclusively the product from hydroamination without competitive oxidative amination or olefin isomerization with catalysts generated from a biaryl dialkyl phosphine and an analogue