A crystalline sponge based on dispersive forces suitable for X-ray structure determination of included molecular guests
作者:Elena Sanna、Eduardo C. Escudero-Adán、Antonio Bauzá、Pablo Ballester、Antonio Frontera、Carmen Rotger、Antonio Costa
DOI:10.1039/c5sc01838b
日期:——
A new organic material assembled by dispersive forces exhibits stable one-dimensional channels suitable as the solid support in X-ray structural studies by the crystalline sponge method.
Macrocyclic Tetraimines: Synthesis and Reversible Uptake of Diethyl Phthalate by a Porous Macrocycle
作者:Elena Sanna、Eduardo C. Escudero-Adán、Carlos López、Pablo Ballester、Carmen Rotger、Antonio Costa
DOI:10.1021/acs.joc.6b00768
日期:2016.6.17
The imine bond has attracted much attention for the synthesis of macrocycles used to construct porous materials. In the present article, we report on the synthesis of two series of isomeric macrocyclic tetraimines based on bis-alkynylbenzene diamines. Under heterogeneous solid–liquid conditions the condensation of the diamines with isophthalaldehyde or terephthaldehyde afforded mainly the corresponding
Janus‐Like Squaramide‐Based Hosts: Dual Mode of Binding and Conformational Transitions Driven by Ion‐Pair Recognition
作者:Bartomeu Soberats、Luis Martínez、Elena Sanna、Angel Sampedro、Carmen Rotger、Antoni Costa
DOI:10.1002/chem.201103345
日期:2012.6.11
complexes. The corresponding stoichiometries and binding affinities of the complexes were evaluated by multi‐regression analysis. The formation of high‐order complexes, supported by ROESY, NOESY and mass spectrometry experiments, has been attributed to the insertion of NR4I ion pairs between the carbonyl and NH protons of the squaramide groups located in adjacent arms of 4. The observed effects reflect the
已经合成了新的基于三脚架方酸酰胺的宿主,并通过分光镜方法对其结构进行了表征。如通过1 H NMR光谱法和UV稀释实验所证明的,在CDCl 3中的2.5%(v / v)[D 6 ] DMSO中,化合物4形成二聚体组装[log K dim = 3.68(8)] 。原子力显微镜和扫描电镜分析揭示了成束纤维网络的形成,这表明了聚集的优先机制。这些C 3对称的三脚架宿主表现出两种不同且互斥的结合方式,通过同时重新定位方胺基团,可以轻松接近每种结合方式。在第一,NH squaramide质子会聚布置允许N中的一个阵列的形成 H⋅⋅⋅X -氢键与阴离子。在第二种模式下,羰基方酰胺基团的重新取向使铵离子与CO·⋅⋅H发生多次相互作用。滴定度4用不同的碘化四烷基铵的化合物持续显示出1:1的配合物,以及1:2和1:3的配合物。通过多元回归分析评估了配合物的相应化学计量和结合亲和力。由ROESY,NOES
Conventional Tetrakis(triphenylphosphine)palladium-Copper(I) Iodide-Catalyzed Sonogashira Coupling of Free and BOC- Protected Propargylic Amines “On Water”
作者:Bartomeu Soberats、Luis Martínez、Manuel Vega、Carmen Rotger、Antoni Costa
DOI:10.1002/adsc.200900240
日期:——
Alkynylation of aryl iodides with propargylicamines has been achieved by means of a Sonogashiracoupling using “on water” methods. The use of less than 0.2 mol% of tetrakis(triphenylphosphine)palladium [Pd(PPh3)4] and 1.5 mol% copper(I) iodide [CuI] in the presence of diisopropylethylamine (DIPEA) allows the coupling to proceed at 95 °C yielding moderate to good yields of mono-, bis-, and tris-aminoalkynylbenzene