平面手性1,2,4-吡唑膦Ru~Ⅱ夾心配合物的合成與結(jié)構(gòu)研究
發(fā)布時(shí)間:2018-09-11 13:25
【摘要】:平面手性催化已經(jīng)成為不對(duì)稱(chēng)催化領(lǐng)域的重要研究方向,而合成適用性較強(qiáng)的金屬配合物催化劑就成為此領(lǐng)域的研究熱點(diǎn)。1,2,4-膦雜吡唑雜環(huán)由于N、P原子電負(fù)性差異及配位能力不同,擁有多種配位模式而被廣泛應(yīng)用。本文以二茂鐵結(jié)構(gòu)為基本出發(fā)點(diǎn),設(shè)計(jì)將呋喃、噻吩環(huán)及叔丁基引入到膦雜吡唑環(huán)中,得到3位為呋喃(噻吩)環(huán),5位為叔丁基的新型不對(duì)稱(chēng)1,2,4-膦雜吡唑化合物,并將其作為配體與金屬釕(Ⅱ)配位得到新型帶有呋喃(噻吩)雜環(huán)的平面手性金屬釕夾心配合物;谶^(guò)渡金屬銅、銀、金的鹵化物與含氮雜環(huán)配體合成的多核結(jié)構(gòu)的金屬配合物在催化及光化學(xué)方面表現(xiàn)出的優(yōu)良性能,本文以3,5-對(duì)稱(chēng)的1,2,4-膦雜吡唑?yàn)榕潴w與金屬Cu(Ⅰ)配位得到新型的膦雜吡唑銅多核金屬配合物。 具體研究?jī)?nèi)容如下: 設(shè)計(jì)合成出5-叔丁基-3-呋喃基-1,2,4-膦雜吡唑和5-叔丁基-3-噻吩基-1,2,4-膦雜吡唑兩類(lèi)3,5-不對(duì)稱(chēng)化合物,以其為配體利用其鉀鹽與Cp*RuⅡCl進(jìn)行鹽消除反應(yīng)獲得兩種含呋喃(噻吩)雜環(huán)的平面手性1,2,4-吡唑膦RuⅡ夾心配合物,采用1H NMR、31PNMR、XRD和IR等技術(shù)對(duì)其進(jìn)行了表征。配合物[(5-tBu-3-thienyldp)RuCp*]的單晶結(jié)構(gòu)表明Ru與不對(duì)稱(chēng)膦雜吡唑環(huán)和Cp*環(huán)配位模式為η5,所得平面手性化合物為外消旋體。這些結(jié)果為該類(lèi)配合物的手性分離及其在不對(duì)稱(chēng)催化性能方面的研究提供了重要的實(shí)驗(yàn)基礎(chǔ)。 采用3,5-異丙基-1,2,4-膦雜吡唑?yàn)榕潴w,利用其鉀鹽與Cp*RuⅡCl進(jìn)行鹽消除反應(yīng)獲得夾心釕配合物,采用1H NMR、31P NMR、XRD和IR等技術(shù)對(duì)其進(jìn)行了表征。配合物[(3,5-iPrdp)RuCp*]的單晶結(jié)構(gòu)表明Ru與1,2,4-膦雜吡唑環(huán)和Cp*環(huán)配位模式為η5,配合物具有類(lèi)似二茂鐵的平面夾心結(jié)構(gòu)。 此外還采用3,5-取代基為異丙基,叔丁基,,苯基的1,2,4-膦雜吡唑?yàn)榕潴w,通過(guò)其鉀鹽與CuCl反應(yīng),合成出三核或四核配合物,并采用1H NMR、31P NMR和IR等技術(shù)對(duì)其進(jìn)行了表征。
[Abstract]:Planar chiral catalysis has become an important research field in asymmetric catalysis. The synthesis of metal complex catalysts with strong applicability has become a research hotspot in this field. The heteropyrazole ring has been widely used because of the difference of electronegativity and coordination ability of Na-P atom. In this paper, based on the structure of ferrocene, furan, thiophene ring and tert-Ding Ji were designed and introduced into the phosphopyrazole ring. A novel asymmetric 1-dithiophene 4-phosphophosphonopyrazole compound with 3 positions as furan (thiophene) ring and 5 position as tertiary Ding Ji was obtained. A novel planar chiral ruthenium sandwich complex with furan (thiophene) heterocycles was obtained by ligand coordination with ruthenium (鈪
本文編號(hào):2236813
[Abstract]:Planar chiral catalysis has become an important research field in asymmetric catalysis. The synthesis of metal complex catalysts with strong applicability has become a research hotspot in this field. The heteropyrazole ring has been widely used because of the difference of electronegativity and coordination ability of Na-P atom. In this paper, based on the structure of ferrocene, furan, thiophene ring and tert-Ding Ji were designed and introduced into the phosphopyrazole ring. A novel asymmetric 1-dithiophene 4-phosphophosphonopyrazole compound with 3 positions as furan (thiophene) ring and 5 position as tertiary Ding Ji was obtained. A novel planar chiral ruthenium sandwich complex with furan (thiophene) heterocycles was obtained by ligand coordination with ruthenium (鈪
本文編號(hào):2236813
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