报道了一种合成具有 V 形分子结构的环氧二苯并 [ b , f ] [1,5]重氮辛的新方法。这种独特的方法基于前所未有的碱催化、无溶剂自缩合和氟化邻苯二甲酸的交叉缩合-氨基苯酮。通过 X 射线分析和手性光学方法独立地证实了新合成的重氮辛的结构。重氮辛支架的刚性允许将外消旋体分离成单个对映异构体,这些对映异构体在高达 140 °C 时具有热稳定性。此外,通过进行一系列典型的转化,包括过渡金属催化的反应,在不影响双半胺亚基的情况下进行,证明了重氮辛支架的惰性。
Selective Metal-Controlled Synthesis of Trifluoromethylated (Indolin-2-ylidene)methyl- and Quinolin-3-ylphosphonates
作者:Alexander Yu. Mitrofanov、Valentina A. Bychkova、Sergey E. Nefedov、Irina P. Beletskaya
DOI:10.1021/acs.joc.0c00913
日期:2020.11.20
Metal-catalyzed (Cu, Ag, Au) reactions of alkynylphosphonates with 1-(2-aminophenyl)-2,2,2-trifluoroethan-1-ones were developed. Terminal alkyne diethyl ethynylphosphonate reacted with ketones to give different products depending on the catalyst used. With a CuI/PPh3 catalytic system, the formation of CF3-containing indoline derivatives was observed with good yields. The use of AgSbF6 as a catalyst
regioselective deacylation of N,N-dimethyl-2,4-bis(trifluoroacetyl)-1-naphthylamine with trifluoroacetic acid and water. The aromaticnucleophilic substitutions of 10 with various amines, thiols and alcohols proceeded cleanly to give the corresponding N–N, N–S and N–O exchanged products in moderate to excellent yields.
A novel method for the synthesis of epoxydibenzo[b,f][1,5]diazocines exhibiting a V-shaped molecular architecture is reported. The unique approach is based on unprecedented base-catalyzed, solvent-free autocondensation and cross-condensation of fluorinated o-aminophenones. The structure of the newly synthesized diazocines was confirmed independently by X-ray analysis and chiroptical methods. The rigidity
报道了一种合成具有 V 形分子结构的环氧二苯并 [ b , f ] [1,5]重氮辛的新方法。这种独特的方法基于前所未有的碱催化、无溶剂自缩合和氟化邻苯二甲酸的交叉缩合-氨基苯酮。通过 X 射线分析和手性光学方法独立地证实了新合成的重氮辛的结构。重氮辛支架的刚性允许将外消旋体分离成单个对映异构体,这些对映异构体在高达 140 °C 时具有热稳定性。此外,通过进行一系列典型的转化,包括过渡金属催化的反应,在不影响双半胺亚基的情况下进行,证明了重氮辛支架的惰性。
NHC-Cu(I)-Catalyzed Friedländer-Type Annulation of Fluorinated <i>o</i>-Aminophenones with Alkynes on Water: Competitive Base-Catalyzed Dibenzo[<i>b</i>,<i>f</i>][1,5]diazocine Formation
作者:Paweł Czerwiński、Michał Michalak
DOI:10.1021/acs.joc.7b01235
日期:2017.8.4
good yields. Further investigations proved that o-FMKs could be efficiently transformed into a rare class of heterocyclic compounds—dibenzo[b,f][1,5]diazocines—by a base-catalyzed condensation, also on water. The developed method was applied for gram-scale synthesis of a fluorinated analogue of G protein-coupled receptor antagonist (GPR91).