手性脱氢枞胺拆分1,1′-联-2-萘酚

对外消旋1,1′-联-2-萘酚〔(±)-BINOL〕的拆分方法进行了研究。以廉价的手性脱氢枞胺为拆分剂,用正交实验法考察了反应时间、拆分剂用量、溶剂配比、(±)-BINOL浓度对(S)-BINOL和(R)-BINOL产率的影响。在反应时间1 h、n(脱氢枞胺)∶n〔(±)-BINOL〕=1∶1、V(乙醇)∶V(水)=4∶1、c〔(±)-BINOL〕=0.3 mol/L的最佳条件下,(S)-BINOL和(R)-BINOL的收率分别为72.7%和53.1%,它们的ee值均大于99%,拆分剂的回收率为90.5%。该文研究工作的新颖性已为中国化工信息中心2009年9月18日出具的第2009-234号《科技查新报告》所证实。     

1-(1,4-苯并二噁烷-2-羰基)哌嗪对映体的分离研究

1 (1, 4 苯并二口恶烷2 羰基)哌嗪是制备抗高血压药物多沙唑嗪的重要中间体,手性多沙唑嗪可以通过中间体的手性分离来制备。用柱前衍生化-反相高效液相色谱法对1 (1, 4 苯并二口恶烷2 羰基)哌嗪对映体进行了分离。结果表明,用乙酰葡萄糖异硫氰酸酯(GITC)为柱前手性衍生化试剂,C18柱(4 6mm×250mm)为色谱柱,可以将1 (1, 4 苯并二口恶烷2 羰基)哌嗪对映体分离,其他色谱条件为:流动相组成为V(甲醇)∶V(0 02mol/L磷酸二氢钾水溶液) = 53∶47,流速为0 5mL/min,检测波长为250nm。在选择的测定条件下,非对映异构体分离度约等于1 3(R=1 3)。     

手性2,2’-双二苯基膦基-1,1’-联萘的合成

以(S)-(-)-1,1'-联萘-2,2'-二酚为原料,经三氟甲基磺酸基保护后与二苯基氧膦偶联,最后经三氯硅烷还原得到(S)-(-)-2,2'-双二苯基膦基-1,1'-联萘,采用~(31)PNMR、~1HNMR和HRMS对目标化合物进行结构表征,通过考察各步的反应条件,得出最佳的工艺条件:n〔(S)-(-)-1,1'-联-2-萘酚二(三氟甲磺酸酯)〕∶n(二苯基氧膦)∶n(1,4-二氮杂二环[2.2.2]辛烷)∶n〔Ni(dppe)Cl_2〕∶n(HSiCl_3)=1∶2.1∶2.5∶0.1∶3,在催化偶联步骤反应温度为100℃,反应时间为48 h,三氯硅烷还原步骤加热回流5 h,得到手性2,2'-双二苯基膦基-1,1'-联萘的收率可达82.3%,e.e.值为99.3%。     

2,2′-二羟基-1,1′-联萘合成方法综述

综述了 2 ,2′ 二羟基 1,1′ 联萘 (联萘酚 )的合成方法 ,包括外消旋体的合成以及手性合成。参考文献 5 1篇     

1,1′-联-2-萘酚的拆分进展

综述了近几年来1,1′-联-2-萘酚的拆分研究状况,并对其今后的发展提出展望。     

1-(1,4-苯并二(口恶)烷-2-羰基)哌嗪对映体的分离研究

1-(1,4-苯并二(口恶)烷-2-羰基)哌嗪是制备抗高血压药物多沙唑嗪的重要中间体,手性多沙唑嗪可以通过中间体的手性分离来制备.用柱前衍生化-反相高效液相色谱法对1-(1,4-苯并二(口恶)烷-2-羰基)哌嗪对映体进行了分离.结果表明,用乙酰葡萄糖异硫氰酸酯(GITC)为柱前手性衍生化试剂,C18柱(4.6 mm×250 mm)为色谱柱,可以将1-(1,4-苯并二(口恶)烷-2-羰基)哌嗪对映体分离,其他色谱条件为流动相组成为V(甲醇)V(0.02 mol/L磷酸二氢钾水溶液)= 5347,流速为0.5 mL/min,检测波长为250 nm.在选择的测定条件下,非对映异构体分离度约等于1.3(R=1.3).     

1-叔丁氧羰基-(S)-2-羟甲基氮杂环丁烷的合成

报道了一种合成(S)-2-羟甲基氮杂环丁烷的新方法,即以γ-丁内酯为起始原料,经溴代开环成2,4-二溴丁酸甲酯(■),然后与(S)-α-苯乙胺双取代环化生成氮杂1-[(S)-1-苯乙基]-2-甲氧羰基氮杂环丁烷的两种非对映异构体■(2S,1′S)和■(2R,1′S),经柱层析分离,氢化铝锂还原成醇(■)后,氢解脱去(S)-1-苯乙基和引入Boc保护基生成标题化合物1-叔丁氧羰基-(S)-2-羟甲基氮杂环丁烷。总共4步反应,总收率为40%。~1H NMR和MS表征确证了关键中间体和目标产物结构。     

核壳型色谱柱-高效液相色谱法快速分离检测水飞蓟素中7种非对映异构体

采用核壳型色谱柱-高效液相色谱法快速分离检测水飞蓟素中7种非对映异构体,优化了液相色谱条件,实现了7种非对映异构体的快速完全分离,并应用于市售水飞蓟制剂的分离检测。优化色谱条件如下:核壳型Halo C_(18)色谱柱(150mm×4.6mm,2.7μm)、甲醇-水-甲酸(30∶70∶0.1)-甲醇为流动相、梯度洗脱、流速0.35mL·min~(-1)、进样量2μL。该方法在0.01~0.1mg·mL~(-1)浓度范围内线性关系良好(R20.997),色谱峰峰面积和保留时间的相对标准偏差(RSD)分别为1.74%和0.67%(n=6)。该方法操作简单、省时、分离度好,可用于水飞蓟制剂的分析检测,也为水飞蓟素中非对映异构体的分离检测提供新的思路。     

多沙唑嗪中间体的手性分离方法优化研究

多沙唑嗪是一种抗高血压手性药物,1-(1,4-苯并二口恶烷-2-羰基)哌嗪(BCP)是合成该药物的重要手性中间体。手性多沙唑嗪的光学纯度可以通过BCP的光学纯度来控制。该文采用柱前衍生化-反相高效液相色谱法优化了BCP的手性分离方法,以便对其进行光学纯度检测。结果表明:以乙酰葡萄糖异硫氰酸酯(G ITC)为柱前手性衍生化试剂,C18柱(4.6 mm×250 mm)为色谱柱,可以将BCP对映体分离,优化的其他色谱条件为:流动相组成V(CH3OH)∶V〔c(KH2PO4的水溶液)=0.02 mol/L〕=50∶50,流速0.6 mL/m in,检测波长250 nm。在选择的测定条件下,BCP与G ITC形成的非对映异构体达到基线分离,分离度约等于1.5(R=1.5),在2~250μg.mL-1内,非对映体的色谱峰面积与质量浓度之间线性相关系数大于0.998。     

球磨机中无溶剂高效合成1,1’-联二萘酚

球磨机中机械力化学作用下,β-萘酚经CuCl2·2H2O氧化偶联,无溶剂固态直接合成1,1’-联二萘酚,产率达91%。最佳反应条件为:球磨机转速350 r/min,n(CuCl2·2H2O)∶n(β-萘酚)=2∶1,研磨时间2 h。同时考察了其他Cu(Ⅱ)/Fe(Ⅲ)的金属盐氧化剂作用的β-萘酚的氧化偶联。     

1,1’-联-2-萘酚拆分工艺研究

研究了用手性苯乙胺和硼酸拆分消旋联萘酚,当消旋联萘酚与手性苯乙胺之比为1∶1.5(mol)、拆分时间为12h时,可以得到收率为44%、光学收率高于99%的手性联萘酚。     

Facile electrosynthesis of novel free-standing electroactive poly((S)-(−)-1,1′-bi-2-naphthol dimethyl ether) films with enhanced main chain axial chirality

Direct anodic oxidation of (S)-(−)-1,1′-bi-2-naphthol dimethyl ether (BNME) in CH₂Cl₂/CHCl₃ containing boron trifluoride diethyl etherate (BFEE) as the supporting electrolyte led to facile electrodeposition of high-quality free-standing poly((S)-(−)-1,1′-bi-2-naphthol dimethyl ether) (PBNME) film on stainless steel (SS)/indium tin oxide (ITO) electrodes. As-formed PBNME films showed good electroactivity and redox stability in CH₂Cl₂-BFEE, BFEE, and even in concentrated sulfuric acid. Both doped and dedoped PBNME films were partly soluble in strong polar solvents, such as dimethyl sulfoxide (DMSO). Quantum chemistry calculations of BNME and FT-IR spectrum of dedoped PBNME films demonstrated that the polymerization probably occurred at 4- and 4′-positions. Optical rotation determination showed that the conformation of the monomer was maintained during the electrochemical polymerization process and the polymer exhibited greatly enhanced optical rotation value with main chain axial chirality compared with that of the monomer. Fluorescent spectral studies indicated that soluble PBNME was a good blue-light emitter with maximum emission at 415 nm and fluorescence quantum yield of 0.15, while solid-state PBNME film showed its emission centered at 380 nm. Furthermore, as-formed PBNME manifested favorable thermal stability and relatively high electrical conductivity of about 10⁻¹ S cm⁻¹ at room temperature.     

联萘酚纳米孔道配位聚合物催化剂的研究进展

纳米多孔材料可用作催化剂、气体储存材料和光电子器件,是目前新型多孔材料的研究热点之一。手性联萘酚配体所修饰的催化剂是一种很优异的C2轴对称手性诱导源,可以催化各种α,β-不饱和羰基化合物,具有良好的催化活性和对映选择性。本文对由手性联萘酚类配体所修饰的小分子催化剂、聚合物负载的催化剂和自负载催化剂,在不饱和羰基化合物催化不对称环氧化反应中的应用进行了综述。本文介绍了对手性联萘酚纳米多孔配位聚合物的研究。     

Epoxy resins from dinaphthols

Epoxy resins were prepared from di-α-naphthol(4,4′-dihydroxy-1,1′-dinaphthyl) and di-β-naphthol(2,2′-dihydroxy-1,1′-dinaphthyl). The resins consisted mainly of the reaction product of 1 mole of dinaphthol with 2 moles of epichlorhydrin. They contained chlorine, however, and were correspondingly deficient in diepoxide functionality. The resins from di-α-naphthol were crystalline, had m.p. 200°C., and were not miscible with conventional curing agents. Di-β-naphthol gave resins with softening points in the range 50–70°C., which cured with diethylenetriamine or the anhydrides of dibasic acids, giving hard but brittle products. The brittleness was not removed by curing with plasticizing curing agents, such as tetrapropenyl succinic anhydride. The cured di-β-naphthol-based resins had thermal stabilities similar to analogous epoxy resins based on bisphenol A.     

1-氨基-2-萘酚-4-磺酸的合成工艺研究

以 β 萘酚为原料 ,在水 醇混合溶剂存在下 ,经亚硝化、加成、磺化制得 1 氨基 2 萘酚 4 磺酸 ,考察了原料配比、混合溶剂配比、反应时间、反应温度及过滤等因素对反应的影响 ,确定了优惠工艺条件。亚硝化条件 :n(酚 )∶n(亚硝酸钠 )∶n(硫酸 ) =1∶1∶0 5 ,以 10 gβ 萘酚计 ,有机溶剂异丙醇用量 15ml,混合溶剂配比V(水 )∶V(异丙醇 ) =(1～ 1 5 )∶1。亚硝化完毕后将物料过滤 ,水洗。加成反应时间控制在 6h ,n(酚 )∶n(亚硫酸氢钠 ) =1∶2 ,碘化反应时间6h ,温度 5 0～ 6 0℃。在此条件下 ,收率达到 72 1%。     

Binaphthol-strapped chiral bis(porphyrinato) cerium double-decker complexes

(R)-(+)- or (S)-(−)-1,1′-bi-2-naphthol (BINOL) was applied as a remote chiral auxiliary to connect the two facing porphyrin rings, resulting in the BINOL-strapped chiral bis(porphyrinato) cerium double-decker complexes (R)-/(S)-1 and (R)-/(S)-2, which were carefully characterized by a range of spectroscopic and electrochemical methods. Perfect mirror images were observed in their circular dichroism (CD) spectra with a negative sign in the Soret band for (R)-enantiomers and a positive sign for (S)-enantiomers, which suggests the C₂-chirality of a BINOL strap is transcribed to the double-decker core as a defined chiral twist in the inter-porphyrin arrangement. Furthermore, the CD intensities of (R)-/(S)-1 are always larger than those of (R)-/(S)-2, indicating that the intramolecular chirality transfer efficiency can be finely tuned by changing the length of interlocking moieties.     

Synthesis, Characterization and Catalytic Properties of Chiral BINOL Functionalized Mesoporous Silicas for Enantioselective Morita-Baylis-Hillman Reaction

Several Chiral BINOL functionalized mesoporous silicas were prepared by post grafting of organosilane derivatives of (S)-BINOL (1,1′-bi-2-naphthol) on SBA-15 and characterized by ¹³C CP/MAS NMR, FT-IR, UV–visible absorption spectra, elemental analysis, powder XRD, nitrogen adsorption–desorption isotherms and TEM techniques. Their catalytic properties were demonstrated in enantioselective Morita-Baylis-Hillman reaction of 3-phenylpropanal and cyclohexenone. Among them, 3BSBA-15 linked through the 3 position of BINOL exhibit higher enantioselectivity (26% e.e.) and yield (88%) which are similar to the homogeneous catalyst (S)-BINOL (27% e.e. and 92% yield) as Brønsted acids catalyst, while complex of 3BSBA-15 and calcium 3BSBA-15-Ca show lower enantioselectivity (21% e.e.) than its homogeneous complex (S)-BINOL-Ca (32% e.e.) as ligand catalyst. 3BSBA-15 and 3BSBA-15-Ca can be reused with no significant decrease in enantioselectivity and yield.     

虎舌红生物碱类成分的提取分离与结构鉴定

采用生物碱系统提取、硅胶柱层析分离,V(苯)∶V(乙酸乙酯)∶V(二乙胺)=7∶2∶1及V(氯仿)∶V(乙酸乙酯)∶V(二乙胺)=8∶1∶1溶剂系统梯度洗脱,从虎舌红中分离出2种淡黄色油状生物碱SW-Ⅰ及SW-Ⅱ,前者经元素分析、红外光谱(IR)、紫外光谱(UV)及核磁共振氢谱(1HNMR)鉴定,其化学结构为去氢飞廉碱(C16H22N4O2)。