Facile one-pot synthesis of 2,3-dihydro-1H-indolizinium derivatives by rhodium(iii)-catalyzed intramolecular oxidative annulation via C–H activation: application to ficuseptine synthesis
Catalytic Asymmetric Total Synthesis of (−)-Galanthamine and (−)-Lycoramine
作者:Lei Li、Qiao Yang、Yuan Wang、Yanxing Jia
DOI:10.1002/anie.201411338
日期:2015.5.18
conceptually new strategy featuring two metal‐catalyzed reactions as the key steps. A new method for the construction of 3,4‐fused benzofurans has been developed through a palladium‐catalyzed intramolecular Larock annulation reaction, which was successfully applied to the construction of the ABD tricyclic skeleton of 1 and 2. To achieve the asymmetric synthesis of 1 and 2, a ScIII/N,N′‐dioxide complex was used
(-)-加兰他敏(1)和(-)-lycoramine(2)的催化不对称全合成反应已通过采用概念上新颖的策略来实现,该策略以两个金属催化的反应为关键步骤。通过钯催化的分子内Larock环化反应,开发了一种3,4-稠合苯并呋喃的构建新方法,该方法已成功应用于1和2的ABD三环骨架的构建。为了实现1和2的不对称合成,Sc III / N,N'-二氧化物络合物被用来催化3-烷基取代的苯并呋喃酮向甲基乙烯基酮的对映选择性共轭加成反应,以构建手性季碳中心。
The Cp2TiMe2-catalyzed intramolecular hydroamination/cyclization of aminoalkynes
作者:Igor Bytschkov、Sven Doye
DOI:10.1016/s0040-4039(02)00644-5
日期:2002.5
Cp2TiMe2 has been found to be a competent catalyst for the intramolecularhydroamination/cyclization of aminoalkynes. In the presence of 5.0 mol% Cp2TiMe2, the hydroamination reactions proceed smoothly at 100–110°C to give five- and six-membered cyclic imines within 4–6 h. After subsequent reduction performed with zinc-modified NaBH3CN at room temperature cyclic amines can be isolated in good yields
已经发现Cp 2 TiMe 2是氨基炔的分子内加氢胺化/环化的有效催化剂。在5.0 mol%Cp 2 TiMe 2的存在下,加氢胺化反应在100–110°C进行得很顺利,在4–6 h内可生成五元和六元环状亚胺。随后在室温下用锌改性的NaBH 3 CN还原后,可以良好的收率分离出环胺。
A One-Pot Procedure for the Synthesis of α-Amino Phosphonates from Alkynes
Synthesis of substituted (α-methylene lactams by rhodium catalysed carbonylation of acetylenic amines
作者:Eva M. Campi、J.Michael Chong、W.Roy Jackson、Marcel Van Der Schoot
DOI:10.1016/s0040-4020(01)86969-6
日期:1994.2
Reactions of gamma- and beta-aminoalkynes, (2) and (5) with hydrogen and carbon monoxide in the presence of rhodium catalysts give substituted alpha-methylene-2-piperidinones (7) and 2-pyrrolidinones (11).
Campi Eva M., Chong J. Michael, Jackson W. Roy, Van Der Schoot Marcel, Tetrahedron, 50 (1994) N 8, S 2533-2542
作者:Campi Eva M., Chong J. Michael, Jackson W. Roy, Van Der Schoot Marcel