The Reaction of Tris(diethylamino)bismuthine with Carbonyl Compounds and the Reactivity Comparison of Several Metal Amides
作者:Fumio Ando、Kumao Ohashi、Jugo Koketsu
DOI:10.1246/bcsj.49.727
日期:1976.3
effectiveness of the amination reaction depends both on the reactivity of metal amides to carbonyl groups and also on the affinity for oxygen of metal atoms. Although bismuth amide gives the addition product very rapidly, because of its poor affinity for oxygen, the addition products decompose thermally on prolonged standing or on distillation giving large amounts of starting carbonyl compounds along with small
Highly Diastereo- and Enantioselective Cu-Catalyzed [3 + 3] Cycloaddition of Propargyl Esters with Cyclic Enamines toward Chiral Bicyclo[<i>n</i>.3.1] Frameworks
作者:Cheng Zhang、Xin-Hu Hu、Ya-Hui Wang、Zhuo Zheng、Jie Xu、Xiang-Ping Hu
DOI:10.1021/ja303129s
日期:2012.6.13
Cu-catalyzed asymmetric [3 + 3] cycloaddition of propargyl esters with cyclic enamines is reported. With a combination of Cu(OAc)(2)·H(2)O and a chiral tridentate ferrocenyl-P,N,N ligand as the catalyst, perfect endo selectivities (endo/exo > 98/2) and excellent enantioselectivities (up to 98% ee) for endo cycloadducts were achieved under mild conditions. This method provides a simple and efficient approach
Unsaturated nitrogen compounds containing fluorine. Part 15 [1]. The reactions of 2,5-dichloro-1,1,1,6,6,6-hexafluoro-3,4-diazahexa-2,4-diene and its 2-amino derivative with enamines
作者:Mohamad M. Abdul-Ghani、Salim H.A. Benomar (in part)、Anthony E. Tipping
DOI:10.1016/0022-1139(94)03074-x
日期:1994.11
Reaction of the title dichloroazine (1) with the enamines NR2 [(4), NR2=Net2, n=2; (6), NR2=NEt2, n=3; (7), NR2=H2, n=2] gives initially the 2-substituted enamines C(CF3)=NN=CClCF3 (19a–c) which can undergo tautomerisation to the rearranged enamines R2N=C(CF3)NHN=CClCF3(20a–c). Further reaction of amine 20a takes place with dichloroazine 1 to afford the bicyclic compound CF3CCl=NNHCH(CF3)H2 (5) (34%)
标题二氯嗪(1)与烯胺NR 2 [(4),NR 2= Net 2,n= 2;n= 2。(6),NR 2= NEt 2,n= 3;(7),NR 2 = H2,n = 2]最初给出的是2-取代的烯胺C(CF 3)= NN = CClCF 3(19a–c),该胺可以进行互变异构化成重排的烯胺R 2 N = C(CF 3)NHN = CClCF 3(20a–c)。胺20a与二氯嗪1进一步反应,得到双环化合物CF 3 CCl = NNHCH(CF 3)H 2(5)(34%)。在硅胶上尝试纯化时,通过水解形成所有其他分离的产物,即19a →Et 2 N = C(CF 3)N = NCOCF 3(9)(23%);m / z 2(N )。19b →O =HC(CF)3= NN = CRCF 3 [R = Net 2(11)(21%);N = CRC(3)。R = NHEt(12)(17%)];19c →O
Reaction of Tungsten Vinylcarbene Complexes with Enamines
作者:Junes Ipaktschi、Parham Rooshenas、Ansgar Dülmer
DOI:10.1021/om050610d
日期:2005.12.1
rearrangement to the observed η1-acyl complexes. Furthermore the reaction of the η1-vinylidene complex [(CO)(NO)(Cp)WCCH2)] (1) with the enamines 5 and 9 is described. While enamine 5 preferably reacts as a nucleophile and produces finally the alkene complex 11, the reaction of enamine 9 with 1 begins by a proton transfer step and ends with the η1-acyl complex 10. Single-crystal X-ray diffraction data
Synthesis of Densely Substituted Pyridines through 1,2‐Oxazine‐6‐ones Inverse Electron Demand Diels–Alder Reaction
作者:Dmitrii S. Ivanov、Alexander Yu. Smirnov、Elvira R. Zaitseva、Andrey A. Mikhaylov、Mikhail S. Baranov
DOI:10.1002/ejoc.202301133
日期:2024.1.2
A new simple method for synthesis of densely substituted pyridines from available 1,2-oxazin-6-ones and enamines through tandem hetero-Diels–Alder and retro-Diels–Alder reaction are presented.