Effect of a proximal oxygen substituent on the efficacy of ruthenium-catalyzed cross-metathesis and RCM
摘要:
Ruthenium-catalyzed cross-metathesis of various derivatives of 1,2-dihydroxy-3-butene reveals that cyclic acetals are best suited as substrates compared to acyclic diethers or diacetates, while RCM is relatively insensitive to the presence of allylic or homoallylic hydroxy or acetoxy groups. (C) 2002 Elsevier Science Ltd. All rights reserved.
Asymmetric Total Syntheses of (−)-Antofine and (−)-Cryptopleurine Using (<i>R</i>)-(<i>E</i>)-4-(Tributylstannyl)but-3-en-2-ol
作者:Sanghee Kim、Taeho Lee、Eunjung Lee、Jaekwang Lee、Gao-jun Fan、Sang Kook Lee、Deukjoon Kim
DOI:10.1021/jo049820a
日期:2004.4.1
The asymmetric total syntheses of the representative phenanthroindolizidine and phenanthroquinolizidine alkaloids, (−)-antofine and (−)-cryptopleurine, are described. An efficient synthetic pathway to the key intermediate 12, in enantiomerically pure form, was achieved by using a chiral building block (R)-9 and the Overman rearrangement with a total transfer of chirality. The problem of constructing
Esters of alkenoic acids, including insect pheromones as examples, have been synthesized using alkene metathesis reactions.
链烯酸的酯,包括昆虫信息素作为例子,已经使用链烯复分解反应合成。
Effect of a proximal oxygen substituent on the efficacy of ruthenium-catalyzed cross-metathesis and RCM
作者:Tarun K Maishal、Dilip K Sinha-Mahapatra、Kavita Paranjape、Amitabha Sarkar
DOI:10.1016/s0040-4039(02)00111-9
日期:2002.3
Ruthenium-catalyzed cross-metathesis of various derivatives of 1,2-dihydroxy-3-butene reveals that cyclic acetals are best suited as substrates compared to acyclic diethers or diacetates, while RCM is relatively insensitive to the presence of allylic or homoallylic hydroxy or acetoxy groups. (C) 2002 Elsevier Science Ltd. All rights reserved.
Orthogonally deconstructable and depolymerizable polysilylethers <i>via</i> entropy-driven ring-opening metathesis polymerization
作者:Alayna M. Johnson、Keith E. L. Husted、Landon J. Kilgallon、Jeremiah A. Johnson
DOI:10.1039/d2cc02718f
日期:——
The synthesis of novel polysilylethers via entropy-driven ring-openingmetathesispolymerization (ED-ROMP) of cyclic bifunctional silyl ether-based monomers is reported. These polymers display good thermal stability and ultra-low Tg (−88 °C). Moreover, they are rapidly deconstructable via the cleavage of the silicon-oxygen linkages with acid or fluoride triggers, and they were partially depolymerizable
报道了通过环状双官能甲硅烷基醚单体的熵驱动开环复分解聚合(ED-ROMP)合成新型聚甲硅烷基醚。这些聚合物显示出良好的热稳定性和超低的T g (-88 °C)。此外,它们可以通过酸或氟化物引发剂裂解硅-氧键来快速解构,并且通过添加外源复分解催化剂可以部分解聚。对解构聚合物产品的分析提供了对聚合物微观结构的深入了解,表明 ED-ROMP 过程是区域随机的。总之,这项工作提供了一类具有一系列潜在应用的新型可解构聚合物。