General, Green, and Scalable Synthesis of Imines from Alcohols and Amines by a Mild and Efficient Copper-Catalyzed Aerobic Oxidative Reaction in Open Air at Room Temperature
A general, green, and scalablesynthesis of the useful imines and α,β-unsaturated imines is successfully achieved by a low-loading and powerful, mild and efficientcopper-catalyzedaerobicoxidativereaction of alcohols and amines in the openair at roomtemperature under base- and dehydrating reagent-free conditions. This practical reaction can use air as the economic and green oxidant, tolerates
One-pot synthesis of γ-lactams in a reaction cascade from α,β-unsaturated imines, CO and ethylene catalysed by Ru3(CO)12†
作者:Daniel Berger、Wolfgang Imhof
DOI:10.1039/a903266e
日期:——
The formation of 1,3-dihydropyrrol-2-one derivatives in moderate to excellent yields may be achieved by sequential insertion of CO and ethylene into CâH bonds of 1-azadienes catalysed by Ru3(CO)12; thus two new CâC bonds and a new center of asymmetry at C3 are produced via an intramolecular aldol condensation-like cyclization.
Ruthenium Catalyzed One-pot Synthesis of Dihydro-pyrrol-2-one Derivatives from α,β-unsaturated Imines, Carbon Monoxide and Ethylene
作者:Daniel Berger、Wolfgang Imhof
DOI:10.1016/s0040-4020(00)00118-6
日期:2000.3
Ru3(CO)12 as a precatalyst induces a catalytic C–C coupling reaction of α,β-unsaturated imines with CO to yield imines with an aldehyde function in β-position with respect to the C–N double bond. An intramolecular cyclization reaction takes place via the nucleophilicattack of the imine nitrogen towards the carbonyl carbon atom building up a pyrrol-2-one system. A second ruthenium catalyzed C–C coupling
使用Ru 3(CO)12作为预催化剂可引起α,β-不饱和亚胺与CO的催化C–C偶联反应,生成相对于C–N双键在β位具有醛功能的亚胺。分子内环化反应是通过亚胺氮对羰基碳原子的亲核攻击而形成的吡咯-2-酮系统而发生的。第二步钌催化的C–C偶联反应导致一个乙烯分子正式插入邻位吡咯-2-一的C–H键中相对于酮基的位置。通过这种选择性反应,分别衍生自肉桂醛或巴豆醛的级联亚胺产生1,3-二氢-吡咯-2-酮衍生物。从β-萘基亚胺开始的类似反应产生作为新型杂环化合物的9b-乙基-4-丙酰基-2,9b-二氢-苯并[ e ]异吲哚-1-酮衍生物。
Copper(II) Triflate Catalyzed Rearrangement of Amino 2,3-Epoxides to α-Amino Ketones
作者:Sunisa Akkarasamiyo、Saranya Chitsomkhuan、Supawadee Buakaew、Joseph S. M. Samec、Pitak Chuawong、Jenjira Saymaya、Punlop Kuntiyong、Wanchai Pluempanupat
DOI:10.1055/s-0043-1775367
日期:2025.1
α-Amino ketones were synthesized by a Meinwald rearrangement of biomass-based amino epoxides using copper(II) triflate as a catalyst. The regioselectivity of the rearrangement can be rationalized in terms of the reaction proceeding via the most stable carbocationic intermediate to give various α-amino α′-aryl ketones in moderate to good yields. This is an attractive method to prepare α-amino ketones
Enantioselective Rhodium-Catalyzed [4 + 2] Cycloaddition of α,β-Unsaturated Imines and Isocyanates
作者:Kevin M. Oberg、Tomislav Rovis
DOI:10.1021/ja200766k
日期:2011.4.6
A [4 + 2] cycloaddition of alpha,beta-unsaturated imines and isocyanates catalyzed by a phosphoramidite rhodium complex provides pyrimidinones in good yields and high enantioselectivities.