本發(fā)明涉及一種應(yīng)用仿生催化體系高度化學(xué)選擇性和對(duì)映選擇性氫化含氟取代的炔基亞胺合成手性含氟手性炔丙胺衍生物的方法。
背景技術(shù):
手性炔丙胺是合成許多天然產(chǎn)物,藥物和復(fù)雜化學(xué)分子的重要合成子,通常具有廣譜的生理活性和藥理活性。這類化合物具有多種潛在的藥物活性,如:抗艾滋、鎮(zhèn)靜、安眠、消炎和利尿等特性。大量研究表明將氟原子或含氟基團(tuán)選擇性地引入有機(jī)分子能顯著地改變?cè)蟹肿拥纳砘钚院驮黾悠溆H脂性。因此對(duì)該類化合物的合成和生物活性研究引起了有機(jī)化學(xué)家和藥學(xué)界的廣泛重視。下面式1的就具有抗艾滋病的含氟炔丙胺的結(jié)構(gòu)單元:
鑒于含氟炔丙胺及其衍生物在藥物和合成化學(xué)領(lǐng)域中的重要性,化學(xué)家們已經(jīng)發(fā)展了一些方法來合成該類化合物。但是僅有的幾例都是通過炔烴對(duì)三氟甲基亞胺的加成來合成三氟甲基炔丙胺。然而通過選擇性不對(duì)稱氫化c=n可以綠色、高效、且原子經(jīng)濟(jì)性較好地合成手性炔丙胺化合物炔沒有報(bào)道。2004年,studer小組和后來的卿小組分別實(shí)現(xiàn)通過手性叔丁基亞磺?;孜镎T導(dǎo),炔基對(duì)亞胺的加成來合成含氟手性炔丙胺(文獻(xiàn)1:a)m.crucianelli,f.deangelis,f.lazzaro,l.malpezzi,a.volonterio,m,zanda,j.fluor.chem.2004,125,573;b)h.xiao,y.huang,f.-l.qing,tetrahedron:asymmetry2010,21,2949.)。之后張和馬等科學(xué)家又分別實(shí)現(xiàn)了以鋅或銠催化炔基對(duì)含氟亞胺的加成來合成含氟手性炔丙胺(文獻(xiàn)6:a)g.huang,j.yang,x.zhang,chem.commun.2011,47,5587;b)f.-g,zhang,h.ma,j.nie,y.zheng,q.gao,j.-a.ma,adv.synth.catal.2012,354,1422;c)f.-g.zhang.;h.ma,y.zheng,j.-a.ma,tetrahedron2012,68,7663;d)k.morisaki,m.sawa,j.nomaguchi,h.morimoto,y.takeuchi,k.mashima,t.ohshima,chem.eur.j.2013,19,8417;e)g.huang,z.yin,x.zhang,chem.eur.j.2013,19,11992.)。
從上述例子中,通過加成反應(yīng)來合成含氟手性炔丙胺取得了一些不錯(cuò)的結(jié)果,但是他們一般條件都較苛刻如需要-78℃,或當(dāng)量的催化劑等等。因此,發(fā)展一種高產(chǎn)率、高立體選擇性的方法合成含氟手性炔丙胺化合物仍然是目 前研究的難點(diǎn)和熱點(diǎn)。
技術(shù)實(shí)現(xiàn)要素:
本發(fā)明的目的是提供一種仿生催化不對(duì)稱選擇性氫化合成手性含氟炔丙胺衍生物的方法,本發(fā)明操作簡(jiǎn)便實(shí)用,原料易得,對(duì)映選擇性高,產(chǎn)率好,且反應(yīng)具有綠色原子經(jīng)濟(jì)性,環(huán)境友好等優(yōu)點(diǎn)。
為實(shí)現(xiàn)上述目的,本發(fā)明的技術(shù)方案如下:
仿生催化不對(duì)稱選擇性氫化合成手性含氟炔丙胺衍生物的方法,其催化體系為(4-異丙基甲苯)碘化釕二聚體和手性磷酸,反應(yīng)式和條件如下:
式中:
溫度:25-100℃;
溶劑:二氯甲烷、甲苯、四氫呋喃、乙酸乙酯、1,4-二氧六環(huán)、1,2-二氯乙烷中的一種或二種以上;
氫氣壓力:13-80個(gè)大氣壓;
時(shí)間:20-48小時(shí);
催化劑:(4-異丙基甲苯)碘化釕二聚體和手性磷酸;
所述r1為苯基或含取代基的苯基或?yàn)檩粱〈鶠?cf3、me、meo、ph以及cl中的一種取代基或二種取代基或三種取代基或四種取代基,取代基個(gè)數(shù)為1-5個(gè);萘基為1或2-位萘基;
所述r2為c1-c20的烷基、c2-c20烯基、c2-c20炔基以及苯基或含取代基的苯基或萘基,苯基上的取代基為-cf3、me、meo、ph以及f中的一種取代基或二種取代基或三種取代基或四種取代基,取代基個(gè)數(shù)為1-5個(gè);萘基為1或2-位萘基;
所述rf為f、cf2h、c1-c6全氟取代的烷基中的一種;
所述磷酸是八氫聯(lián)萘酚骨架或聯(lián)萘酚骨架的手性磷酸,ar為1-位萘基、苯或含有取代基的苯環(huán),苯環(huán)上的取代基為f、cl、cf3、me、meo中的一種取代基或二種取代基,取代基的個(gè)數(shù)為1-5個(gè);
所述菲啶(phenanthridine)及其衍生物是簡(jiǎn)單菲啶,8位是甲基、甲氧基或三氟甲基取代的菲啶中的一種或二種以上。
如上所述將(4-異丙基甲苯)碘化釕二聚體和手性磷酸,菲啶和底物1加入溶劑,在室溫?cái)嚢?-5分鐘;然后充入氫氣13-80個(gè)大氣壓,在25-100℃下攪拌反應(yīng)20-48h后,柱層析得目標(biāo)產(chǎn)物。
所述催化劑為手性磷酸,是由手性binol或h8-binol,將3,3’位碘化后和相應(yīng)的取代苯硼酸arb(oh)2經(jīng)過suzuki偶聯(lián)制備,反應(yīng)中手性磷酸催化劑的使用量和含氟的炔基取代的亞胺的摩爾比0.005:1~0.02:1。
所述菲啶及其衍生物反應(yīng)所需的仿生氫源,反應(yīng)中使用量和含氟的炔基取代的亞胺的摩爾比為0.1:1。
以(4-異丙基甲苯)碘化釕二聚體計(jì),所述配合物摩爾量為氫化底物摩爾量的0.01%到0.05%。
所述溶劑用量為每0.25毫摩爾氫化底物用2到4毫升。
所述反應(yīng)式為對(duì)含氟的炔基取代亞胺通過仿生催化不對(duì)稱選擇性氫化得到相應(yīng)的手性含氟炔丙胺衍生物,釕金屬前體為(4-異丙基甲苯)碘化釕二聚體,仿生氫源為8-甲基菲啶(10mol%),手性磷酸為(r)-cpa的ar為9-蒽基,溶劑為1,2-氯乙烷,溫度為室溫,氫氣壓力為1000psi,所述結(jié)果最佳,對(duì)映體過量可達(dá)到98%。
(4-異丙基甲苯)碘化釕二聚體的制備過程或相關(guān)制備文獻(xiàn)(該金屬可以通過商業(yè)購(gòu)買獲得),也可參考文獻(xiàn)(m.a.bennett,a.k.smith,j.chem.soc.,daltontrans.,1974,233-241.)。
本發(fā)明具有以下優(yōu)點(diǎn):
1.反應(yīng)活性、化學(xué)選擇性和對(duì)映選擇性高,反應(yīng)完全,生成產(chǎn)物專一,分離方便,能獲得高的對(duì)映體過量純品。
2.能得到各種類型的手性含氟炔丙胺衍生物。
3.催化劑制備方便,反應(yīng)操作簡(jiǎn)便實(shí)用。
4.氫化反應(yīng)條件溫和,反應(yīng)在室溫就能進(jìn)行。
5、比較傳統(tǒng)合成方法,此方法采用少量的手性催化劑就可得到大量手性含氟炔丙胺衍生物,實(shí)現(xiàn)手性增值,而且還可以通過改變手性磷酸的構(gòu)型而獲得不同構(gòu)型的手性含氟炔丙胺衍生物,同時(shí)底物范圍較廣泛。
具體實(shí)施方式
下面通過實(shí)施例詳述本發(fā)明;但本發(fā)明并不限于下述的實(shí)施例。
實(shí)施例1:條件的優(yōu)化
往安培瓶中加入稱量好的(4-異丙基甲苯)碘化釕二聚體(0.001毫摩爾,1.0毫克)和手性磷酸(0.0004毫摩爾),8-甲基菲啶(0.02毫摩爾,3.8毫克),氟代炔基亞胺(0.2毫摩爾),1,2-二氯乙烷2.0毫升,攪拌2-5分鐘。然后將安培瓶放入一個(gè)不銹鋼的高壓釜中,通入氫氣1000psi,室溫下反應(yīng)20-48小時(shí)。慢慢釋放氫氣,用旋轉(zhuǎn)蒸發(fā)儀除去溶劑后直接柱層析(淋洗劑石油醚和乙酸乙酯的體積比為30:1)分離得到純的產(chǎn)物,反應(yīng)式及配體如下:
產(chǎn)率為分離收率,產(chǎn)物的對(duì)映體過量用手性液相色譜測(cè)定,見表1。
表1.溶劑和手性磷酸的篩選
[a]反應(yīng)條件:1a(0.1mmol),cpa3(2mol%),溶劑(2.0ml),菲啶(10mol%),[ru(p-cymene)i2]2(0.5mol%),h2(500psi),rt,48h.[b]reactionconversiondeterminedby1hnmrspectroscopy.[c].eewasdeterminedbychiralhplcanalysis.[d]h2(1000psi).[e]8甲基菲啶.
實(shí)施例2:仿生催化不對(duì)稱選擇性氫化合成手性含氟炔丙胺衍生物
往安培瓶中加入稱量好的(4-異丙基甲苯)碘化釕二聚體(0.001毫摩爾,1.0毫克)和手性磷酸((r)-3f,0.0004毫摩爾),8-甲基菲啶(0.02毫摩爾,3.8毫克),氟代炔基亞胺(0.2毫摩爾),1,2-二氯乙烷2.0毫升,攪拌2-5分鐘。然后將安培瓶放入一個(gè)不銹鋼的高壓釜中,通入氫氣1000psi,室溫下反應(yīng)20-48小時(shí)。慢慢釋放氫氣,用旋轉(zhuǎn)蒸發(fā)儀除去溶劑后直接柱層析(淋洗劑石油醚和乙酸乙酯的體積比為30:1)分離得到純的產(chǎn)物,反應(yīng)式如下:
(r)-4-methoxy-n-(1,1,1-trifluoro-4-phenylbut-3-yn-2-yl)aniline(2a):95%yield,paleyellowoil,rf=0.60(petroleumether/ethylacetate=30/1),95%ee,[α]20d=-231.18(c1.16,chcl3);1hnmr(400mhz,cdcl3)1hnmr(400mhz,cdcl3)δ7.43-7.41(m,2h),7.33-7.29(m,3h),6.84-6.77(m,4h),4.75(q,j=5.8hz,1h),3.76(s,4h);13cnmr(100mhz,cdcl3)δ154.2,138.9,132.0,129.1,128.4,123.8(q,j=280.0hz),121.5,117.0,114.9,86.3,80.9,55.7,52.2(q,j=34.0hz);19fnmr(376mhz,cdcl3)δ-75.7;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=11.2min,t2=12.0min(maj).
(r)-4-methoxy-n-(1,1,1-trifluoro-4-p-tolylbut-3-yn-2-yl)aniline(2b):90%yield,paleyellowsolid,mp=56-58℃,rf=0.33(petroleumether/ethylacetate=30/1),95%ee,[α]20d=-249.00(c1.02,chcl3);1hnmr(400mhz,cdcl3)δ7.31(d,j=8.1hz,2h),7.10(d,j=7.9hz,2h),6.83-6.76(m,4h),4.73(q,j=6.3hz,1h),3.75(s,3h),3.73(brs,1h);13cnmr(100mhz,cdcl3)δ154.2,139.4,139.0,131.9,129.1,123.8(q,j=280hz),118.4,116.9,114.9,86.5,80.2(d,j=2.0hz),55.7,52.2(d,j=34.0hz),21.5;19fnmr(376mhz,cdcl3)δ-75.7;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(as-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=8.8min,t2=10.0min(maj).
(r)-4-methoxy-n-(1,1,1-trifluoro-4-(4-methoxyphenyl)but-3-yn-2-yl)aniline(2c):96%yield,paleyellowoil,rf=0.15(petroleumether/ethylacetate=30/1),95%ee,[α]20d=-239.63(c1.20,chcl3);1hnmr(400mhz,cdcl3)δ7.35(d,j=8.9hz,2h),6.83-6.75(m,6h),4.73(q,j=6.2hz,1h),3.79(s,3h),3.75(s,4h);13cnmr(100mhz,cdcl3)δ160.2,154.1,139.0,133.5,123.9(q,j=280.0hz),116.9,114.9,113.5,86.3,79.5(d,j=2.0hz),55.7,52.4,52.2(q,j=34.0hz),;19fnmr(376mhz,cdcl3)δ-75.7;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute: hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=19.6min,t2=20.8min(maj).
(r)-4-methoxy-n-(1,1,1-trifluoro-4-(4-fluorophenyl)but-3-yn-2-yl)aniline(2d):98%yield,paleyellowoil,rf=0.37(petroleumether/ethylacetate=30/1),95%ee,[α]20d=-204.91(c1.26,chcl3);1hnmr(400mhz,cdcl3)δ7.42-7.38(m,2h),7.00(t,j=8.7hz,2h),6.80(dd,j=24.3,9.0hz,4h),4.74(q,j=6.2hz,1h),3.76(s,3h),3.73(brs,1h);13cnmr(100mhz,cdcl3)δ1630(d,j=249.0hz),154.2,138.8,134.0(d,j=8.0hz),123.7(q,j=280.0hz),117.5(d,j=3.0hz),116.9,115.8,115.6,114.9,85.2,80.7,55.6,52.2(q,j=34.0hz);19fnmr(376mhz,cdcl3)δ-75.7,-109.4;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(as-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=11.5min,t2=17.7min(maj);hrms(esi)m/zcalculatedforc17h14f4no[m+h]+324.1006,found324.1011.
(r)-4-methoxy-n-(1,1,1-trifluoro-4-(2-fluorophenyl)but-3-yn-2-yl)aniline(2e):91%yield,paleyellowoil,rf=0.56(petroleumether/ethylacetate=30/1),94%ee,[α]20d=-230.49(c1.18,chcl3);1hnmr(400mhz,cdcl3)δ7.40-7.38(m,1h),7.36-7.26(m,1h),7.11-7.01(m,2h),6.87-6.76(m,4h),4.78(q,6.2hz,1h),3.79(brs,1h),3.75(s,3h);13cnmr(100mhz,cdcl3)δ163.1(d,j=251.0hz),154.3,138.8,133.8(d,j=1.0hz),130.9(d,j=8.0hz),124.5(d,j=280.0hz),124.0(d,j=4.0hz),117.1,115.6(d,j=21.0hz),114.9,110.1(d,j=16.0hz),86.0(t,j=3.0hz),79.9,55.6,52.3(q,j=34.0hz);19fnmr(376mhz,cdcl3)δ-75.6,-109.4;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(as-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=11.1min,t2=14.2min(maj);hrms(esi)m/zcalculatedforc17h14f4no[m+h]+324.1006,found324.1007.
(r)-n-(4-cyclohexenyl-1,1,1-trifluorobut-3-yn-2-yl)-4-methoxyaniline(2f):98%yield,paleyellowoil,rf=0.52(petroleumether/ethylacetate=30/1),94%ee,[α]20d=-200.40(c1.22,chcl3);1hnmr(400mhz,cdcl3)δ6.85-6.77(m,2h),6.77-6.67(m,2h),6.22-6.02(m,1h),4.70-4.52(m,1h),3.75(s,3h),3.66(d,j=9.4hz,1h),2.08(dd,j=6.1,4.3hz,4h),1.67-1.48(m,4h);13cnmr(100mhz,cdcl3)δ154.0,139.1,137.1,123.8(d,j=280.0hz),119.4,116.7,114.8,88.1,78.1(d,j=2.2hz),55.6,52.0(d,j=34.0hz),28.8,25.6,22.1,21.3;19fnmr(376mhz,cdcl3)δ-75.9;enantiomericexcess wasdeterminedbyhplcforthecorrespondingbenzamide(od-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=7.0min(maj),t2=7.8min.
(r)-4-methoxy-n-(1,1,1-trifluorooct-3-yn-2-yl)aniline(2g):98%yield,paleyellowoil,rf=0.57(petroleumether/ethylacetate=30/1),95%ee,[α]20d=-131.87(c1.12,chcl3);1hnmr(400mhz,cdcl3)δ6.73(d,j=9.0hz,2h),6.64(d,j=8.9hz,2h),4.42(q,j=6.3hz,1h),3.68(s,3h),3.53(d,j=8.8hz,1h),2.14-2.09(m,2h),1.44-1.24(m,4h),0.81(t,j=7.3hz,3h);13cnmr(100mhz,cdcl3)δ154.0,139.1,123.9(q,j=280.0hz),116.7,114.8,87.4,72.1(d,j=2.0hz),55.6,51.6(q,j=34.0hz),30.3,21.8,18.3,13.5;19fnmr(376mhz,cdcl3)δ-76.2;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=6.7min(maj),t2=8.5min.
(r)-4-methoxy-n-(1,1,1-trifluoro-6-phenylhexa-3,5-diyn-2-yl)aniline(2h):95%yield,paleyellowoil,rf=0.59(petroleumether/ethylacetate=30/1),94%ee,[α]20d=-334.82(c1.24,chcl3);1hnmr(400mhz,cdcl3)1hnmr(400mhz,cdcl3)δ7.52-7.44(m,2h),7.41-7.27(m,3h),6.87-6.81(m,2h),6.75(d,j=8.9hz,2h),4.67(q,j=6.1hz,1h),3.76(s,3h),3.71(d,j=10.0hz,1h);13cnmr(100mhz,cdcl3)δ154.5,138.3,132.7,129.8,128.5,123.3(q,j=280.0hz),120.8,117.1,114.9,79.1,74.0(d,j=1.8hz),72.7,71.0,55.6,52.4(q,j=34.0hz);19fnmr(376mhz,cdcl3)δ-75.2;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=14.2min(maj),t2=17.4min;hrms(esi)m/zcalculatedforc19h15f3no[m+h]+330.1100,found330.1106.
(r)-4-methyl-n-(1,1,1-trifluoro-4-phenylbut-3-yn-2-yl)aniline(2i):90%yield,paleyellowoil,rf=0.15(petroleumether/ethylacetate=30/1),93%ee,[α]20d=-210.11(c0.82,chcl3);1hnmr(400mhz,cdcl3)δ7.35(dd,j=7.9,1.6hz,2h),7.30-7.18(m,3h),6.98(d,j=8.1hz,2h),6.63(d,j=8.3hz,2h),4.77(q,j=6.1hz,1h),3.81(s,1h),2.19(s,3h);13cnmr(100mhz,cdcl3)δ142.7,132.0,123.0,129.7,129.1,128.4,123.8(q,j=280.0hz),121.5,114.9,86.1,80.8(d,j=2.6hz),51.2(q,j=34.0hz),20.5;19fnmr(376mhz,cdcl3)δ-75.7;enantiomericexcesswasdeterminedbyhplcforthe correspondingbenzamide(ad-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=7.6min,t2=8.5min(maj).
(r)-4-chloro-n-(1,1,1-trifluoro-4-phenylbut-3-yn-2-yl)aniline(2j):93%yield,paleyellowoil,rf=0.65(petroleumether/ethylacetate=30/1),93%ee,[α]20d=-233.58(c1.14,chcl3);1hnmr(400mhz,cdcl3)δ7.46-7.40(m,2h),7.38-7.27(m,3h),7.22-7.16(m,2h),6.77-6.64(m,2h),4.87-4.81(m,1h),4.03(d,j=8.9hz,1h);13cnmr(100mhz,cdcl3)δ143.6,132.0,129.4,128.4,127.8,125.1,123.6(q,j=280.0hz),121.2,115.8,86.5,80.0(t,j=3.0hz),50.7(q,j=34.0hz);19fnmr(376mhz,cdcl3)δ-75.6;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=10.1min,t2=11.6min(maj);hrms(esi)m/zcalculatedforc16h12f3ncl[m+h]+310.0605,found310.0604.
(r)-n-(1,1,1-trifluoro-4-phenylbut-3-yn-2-yl)-4-(trifluoromethyl)aniline(2k):95%yield,paleyellowoil,rf=0.61(petroleumether/ethylacetate=30/1),95%ee,[α]20d=-174.60(c1.30,chcl3);1hnmr(400mhz,cdcl3)δ7.58-7.41(m,4h),7.41-7.27(m,3h),6.80(d,j=8.6hz,2h),5.01-4.94(m,1h),4.36(d,j=9.2hz,1h);13cnmr(100mhz,cdcl3)δ147.5,132.0,129.4,128.5,126.9(q,j=5.0hz),123.5(q,j=280.0hz),123.2(t,j=269.0hz),122.5(q,j=33.0hz),121.0,113.5,86.7,79.5(d,j=3.0hz),49.8(q,j=34.0hz);19fnmr(376mhz,cdcl3)δ–61.5,-75.6;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=10.1min,t2=11.1min(maj);hrms(esi)m/zcalculatedforc17h12f6n[m+h]+344.0868,found344.0879.
(r)-3-methoxy-n-(1,1,1-trifluoro-4-phenylbut-3-yn-2-yl)aniline(2l):92%yield,paleyellowoil,rf=0.56(petroleumether/ethylacetate=30/1),92%ee,[α]20d=-188.83(c1.12,chcl3);1hnmr(400mhz,cdcl3)δ7.43(dd,j=7.6,1.3hz,2h),7.38-7.24(m,3h),7.15(t,j=8.1hz,1h),6.44-6.32(m,3h),4.89(q,j=6.1hz,1h),4.06(d,j=9.2hz,1h),3.77(s,3h);13cnmr(100mhz,cdcl3)δ160.9,146.4,132.0,130.3,129.2,128.4,123.8(q,j=280.0hz),121.4,107.1,105.3,100.8,86.2,80.5(d,j=2.2hz),55.2,50.5(d,j=34.0hz);19fnmr(376mhz,cdcl3)δ-75.7;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute:hexanes/i-proh =95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=12.1min,t2=16.6min(maj).
(r)-n-(1,1,1-trifluoro-4-phenylbut-3-yn-2-yl)aniline(2m):96%yield,paleyellowoil,rf=0.43(petroleumether/ethylacetate=30/1),94%ee,[α]20d=-188.85(c1.06,chcl3);1hnmr(400mhz,cdcl3)δ7.49-7.40(m,2h),7.39-7.21(m,5h),6.95-6.84(m,1h),6.82-6.72(m,2h),4.91(s,1h),4.02(s,1h);13cnmr(100mhz,cdcl3)δ145.0,132.0,129.5,129.2,128.4,124.3(d,j=280.0hz),121.4,120.2,114.5,86.2,80.5(d,j=3.0hz),50.6(q,j=34.0hz);19fnmr(376mhz,cdcl3)δ-75.7;enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(ad-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=8.0min,t2=9.5min(maj).
(r)-4-methoxy-n-(2,2,3,3,3-pentafluoro-4-phenylbut-3-yn-2-yl)aniline(2n):99%yield,paleyellowoil,rf=0.38(petroleumether/ethylacetate=30/1),98%ee,[α]20d=-227.45(c1.42,chcl3);1hnmr(400mhz,cdcl3)δ7.49-7.26(m,5h),6.91-6.72(m,4h),4.84(dd,j=12.2,10.9hz,1h),3.76(s,3h),3.64(s,1h);13cnmr(100mhz,cdcl3)δ154.4,138.7,131.9,129.1,128.4,121.5,117.3,116.2(q,j=285.0hz),114.9,113.1,87.1,80.4(d,j=4.0hz),55.6,50.9(t,j=26.0hz);19fnmr(376mhz,cdcl3)δ-80.7(s,3f);-120.2(d,1f),-123.4(d,1f);enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(od-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=7.3min,t2=9.8min(maj);hrms(esi)m/zcalculatedforc18h15f5no[m+h]+356.1068,found356.1069.
(r)-4-methoxy-n-(2,2,3,3,4,4,4-heptafluoro-4-phenylbut-3-yn-2-yl)aniline(2o):97%yield,paleyellowoil,rf=0.32(petroleumether/ethylacetate=30/1),97%ee,[α]20d=-190.32(c1.50,chcl3);1hnmr(400mhz,cdcl3)δ7.50–7.25(m,5h),6.91–6.68(m,4h),4.91(s,1h),3.76(s,3h),3.66(s,1h);13cnmr(100mhz,cdcl3)δ154.4,138.7,131.9,129.1,128.4,123.9(q,j=269.0hz)121.5,117.3,114.9,114.5,111.9,87.1,80.4(d,j=4.0hz),55.6,51.1(t,j=26.0hz);19fnmr(376mhz,cdcl3)δ-80.8(t,3f);-116.9-117.7.(m,1f),-119.3-120.1(m,1f),-123.8-125.5(m,2f);enantiomericexcesswasdeterminedbyhplcforthecorrespondingbenzamide(od-h,elute:hexanes/i-proh=95/5,detector:254nm,flowrate:0.8ml/min),30℃,t1=6.7min,t2=9.0min(maj);hrms(esi)m/zcalculatedforc19h15f7no[m+h]+406.1036,found406.1038.
產(chǎn)率為分離收率,產(chǎn)物的對(duì)映體過量用手性液相色譜測(cè)定,見表2。
表2.仿生催化不對(duì)稱選擇性氫化合成手性含氟炔丙胺衍生物2
本發(fā)明對(duì)氟代炔基亞胺的不對(duì)稱氫化得到相應(yīng)的手性含氟炔丙胺衍生物,其對(duì)映體過量可達(dá)到98%。本發(fā)明操作簡(jiǎn)便實(shí)用,對(duì)映選擇性高,產(chǎn)率好,且反應(yīng)具有原子經(jīng)濟(jì)性,對(duì)環(huán)境友好等優(yōu)點(diǎn)。