通过采用两种不同的方法,我们合成了四个带有六个硼二吡咯亚甲基染料N 3 P 3(BODIPY)6的环三磷腈环的例子。在方法I,1个当量N中的3 P 3氯6用的6当量处理的内消旋( - Ö -或米-或p -羟基苯基)硼-二吡咯亚甲基在碳酸铯的存在四氢呋喃(THF)。这样得到的N 3 P 3(BODIPY)6的产率为80-90%。在方法II中,我们首先制备了六(对甲酰基苯氧基)环三磷腈N3 P 3(CHO)6通过在THF中碳酸铯存在下用6当量的4-羟基苯甲醛处理1当量的N 3 P 3 Cl 6来实现。在第二步骤中,在室温下在CH 2 Cl 2中在催化量的三氟乙酸(TFA)存在下,将N 3 P 3(CHO)6与过量的吡咯缩合,得到六(对-苯氧基二吡咯甲烷)环三磷腈。在最后一步中,首先在CH 2 Cl 2中用6当量的DDQ氧化六(对苯氧基二吡咯甲烷)环三磷腈。在室温下反应1小时,然后用三乙胺中和,再与过量的BF
通过采用两种不同的方法,我们合成了四个带有六个硼二吡咯亚甲基染料N 3 P 3(BODIPY)6的环三磷腈环的例子。在方法I,1个当量N中的3 P 3氯6用的6当量处理的内消旋( - Ö -或米-或p -羟基苯基)硼-二吡咯亚甲基在碳酸铯的存在四氢呋喃(THF)。这样得到的N 3 P 3(BODIPY)6的产率为80-90%。在方法II中,我们首先制备了六(对甲酰基苯氧基)环三磷腈N3 P 3(CHO)6通过在THF中碳酸铯存在下用6当量的4-羟基苯甲醛处理1当量的N 3 P 3 Cl 6来实现。在第二步骤中,在室温下在CH 2 Cl 2中在催化量的三氟乙酸(TFA)存在下,将N 3 P 3(CHO)6与过量的吡咯缩合,得到六(对-苯氧基二吡咯甲烷)环三磷腈。在最后一步中,首先在CH 2 Cl 2中用6当量的DDQ氧化六(对苯氧基二吡咯甲烷)环三磷腈。在室温下反应1小时,然后用三乙胺中和,再与过量的BF
Synthesis of BF<sub>2</sub> Complexes of Prodigiosin Type Oligopyrroles
作者:M. Rajeswara Rao、Manu D. Tiwari、Jayesh R. Bellare、M. Ravikanth
DOI:10.1021/jo201183s
日期:2011.9.2
We developed a simple, facile route for the synthesis of BF2 complexes of prodigiosin type oligopyrroles and their cholesterol conjugates. This route gives an access to synthesize any desired meso-aryl-substituted 3-pyrrolyl BODIPYs which were not easily accessible earlier.
A mild, efficient and metal-free method was described for the green synthesis of dipyrromethanes from aldehydes and unsubstituted pyrrole catalyzed by SO3H-functionalized ionicliquids (SO3H-ILs) in aqueousmedia at room temperature. Notably, SO3H-ILs, 1-butylsulfonic-3-methylimidazolium hydrogen sulfate ([bsmim][HSO4]) was the most efficient catalyst for moderate to good yields of the corresponding
Structural diversity in heteroleptic dipyrrinato copper(II) complexes
作者:Rakesh Kumar Gupta、Rampal Pandey、Amit Kumar、K.V. Ramanujachary、Samuel E. Lofland、Daya Shankar Pandey
DOI:10.1016/j.ica.2013.09.044
日期:2014.1
Synthesis and characterization of the heteroleptic dipyrrinato complexes [Cu-2(2-pcdpm)(2)(acac)(2)] (1), [Cu-2(2-pcdpm)(2)(hfacac)(2)] (2), [Cu-3(4-OHdpm)(2)(acac)(4)] (3), [Cu-3(4-OHdpm)(2)(hfacac) 4] (4), [Cu-2(3-OHdpm)(acac)(3)] (5), [Cu-2(3-OHdpm)(hfacac)(3)] (6), [Cu(2-OHdpm)(acac)] (7) and [Cu((2)OHdpm)(hfacac)] (8) (acac = acetylacetone; hfacac = hexafluoroacetylacetone; 2-pcdpm = 4-(2-methoxypyridyl) phenyldipyrromethene; 3-pcdpm = 4-(3-methoxypyridyl) phenyldipyrromethene; 4-pcdpm = 4-(4-methoxypyridyl) phenyldipyrromethene; 4-/3-/2-OHdpm = 4-/3-/(2-hydroxyphenyl)dipyrromethene) have been described. The complexes 1-8 have been characterized by elemental analyses, ESI-MS, IR, UV-Vis, EPR and electrochemical (CV and DPV) studies. Electronic absorption spectra of 1-8 clearly suggested that position of the absorption bands depend on the nuclearity and coordination geometry about the copper(II) centres. Structures of 1, 2, 3 and 7 have been determined by X-ray single crystal analyses. The spectral and structural studies revealed that copper(II) in 1 and 2 adopted square pyramidal geometry, whereas in 7 a square planar geometry. On the other hand in trinuclear complex 3 one copper(II) adopted square planar, while other two square pyramidal geometry. In their cyclic voltammo-grams, 1-6 exhibited an irreversible oxidation and two reduction waves whereas 7 and 8 displayed one oxidation and reduction wave. Variable temperature magnetic susceptibility measurements suggested paramagnetic nature of the complexes 1-3. The X-ray photoelectron spectroscopic (XPS) studies indicated that copper(II) centres in complex 3 are present in two different coordination environments. Room temperature EPR studies on 1-8 (g(parallel to) > g(perpendicular to) > 2.003) suggested a typical d(9) copper(II) with unpaired electron lying in a d(x2-y2) orbital. (C) 2013 Elsevier B. V. All rights reserved.