CN112457338B - 一种缺电子烯烃的α-选择性硼氢化反应方法 - Google Patents
一种缺电子烯烃的α-选择性硼氢化反应方法 Download PDFInfo
- Publication number
- CN112457338B CN112457338B CN202011469689.4A CN202011469689A CN112457338B CN 112457338 B CN112457338 B CN 112457338B CN 202011469689 A CN202011469689 A CN 202011469689A CN 112457338 B CN112457338 B CN 112457338B
- Authority
- CN
- China
- Prior art keywords
- alpha
- beta
- unsaturated
- cdcl
- nmr
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000006197 hydroboration reaction Methods 0.000 title claims abstract description 19
- 230000002950 deficient Effects 0.000 title claims abstract description 16
- 150000001336 alkenes Chemical class 0.000 title claims abstract description 15
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052796 boron Inorganic materials 0.000 claims abstract description 25
- 150000001875 compounds Chemical class 0.000 claims abstract description 23
- LALRXNPLTWZJIJ-UHFFFAOYSA-N triethylborane Chemical compound CCB(CC)CC LALRXNPLTWZJIJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- VDAFLCVOQJYZFA-UHFFFAOYSA-N B.CN(C)C1=CC=NC=C1 Chemical compound B.CN(C)C1=CC=NC=C1 VDAFLCVOQJYZFA-UHFFFAOYSA-N 0.000 claims abstract description 9
- -1 boron free radical Chemical class 0.000 claims abstract description 7
- 150000003254 radicals Chemical class 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 239000012298 atmosphere Substances 0.000 claims abstract description 5
- 239000002243 precursor Substances 0.000 claims abstract description 5
- 239000003999 initiator Substances 0.000 claims abstract description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 63
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 40
- 239000003480 eluent Substances 0.000 claims description 20
- 239000012046 mixed solvent Substances 0.000 claims description 20
- 239000003208 petroleum Substances 0.000 claims description 20
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical group SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 claims description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 150000001408 amides Chemical class 0.000 claims description 4
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 claims description 4
- UORVGPXVDQYIDP-UHFFFAOYSA-N trihydridoboron Substances B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000085 borane Inorganic materials 0.000 claims description 3
- 150000002825 nitriles Chemical class 0.000 claims description 3
- 238000002390 rotary evaporation Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 3
- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-UHFFFAOYSA-N 0.000 claims description 2
- NIFAOMSJMGEFTQ-UHFFFAOYSA-N 4-methoxybenzenethiol Chemical compound COC1=CC=C(S)C=C1 NIFAOMSJMGEFTQ-UHFFFAOYSA-N 0.000 claims description 2
- 125000003368 amide group Chemical group 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 2
- 125000004185 ester group Chemical group 0.000 claims description 2
- 150000003457 sulfones Chemical class 0.000 claims description 2
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 125000000524 functional group Chemical group 0.000 abstract description 3
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 110
- 239000000047 product Substances 0.000 description 27
- 238000004607 11B NMR spectroscopy Methods 0.000 description 18
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 18
- 238000005160 1H NMR spectroscopy Methods 0.000 description 18
- 238000002474 experimental method Methods 0.000 description 17
- 238000002844 melting Methods 0.000 description 15
- 230000008018 melting Effects 0.000 description 15
- 239000007787 solid Substances 0.000 description 15
- 238000002360 preparation method Methods 0.000 description 5
- KBEBGUQPQBELIU-CMDGGOBGSA-N Ethyl cinnamate Chemical compound CCOC(=O)\C=C\C1=CC=CC=C1 KBEBGUQPQBELIU-CMDGGOBGSA-N 0.000 description 4
- KBEBGUQPQBELIU-UHFFFAOYSA-N cinnamic acid ethyl ester Natural products CCOC(=O)C=CC1=CC=CC=C1 KBEBGUQPQBELIU-UHFFFAOYSA-N 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- CTSLXHKWHWQRSH-UHFFFAOYSA-N oxalyl chloride Chemical compound ClC(=O)C(Cl)=O CTSLXHKWHWQRSH-UHFFFAOYSA-N 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 description 2
- 238000004293 19F NMR spectroscopy Methods 0.000 description 1
- ADLVDYMTBOSDFE-UHFFFAOYSA-N 5-chloro-6-nitroisoindole-1,3-dione Chemical compound C1=C(Cl)C([N+](=O)[O-])=CC2=C1C(=O)NC2=O ADLVDYMTBOSDFE-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000003934 aromatic aldehydes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000007806 chemical reaction intermediate Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000008049 diazo compounds Chemical class 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 125000000879 imine group Chemical group 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000000269 nucleophilic effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
- C07F5/027—Organoboranes and organoborohydrides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明公开了一种缺电子烯烃的α‑选择性硼氢化反应方法,以4‑二甲氨基吡啶硼烷络合物为硼自由基前体,以三乙基硼烷为自由基引发剂,在空气氛围、催化剂和溶剂的存在下于室温条件实现α,β‑不饱和化合物的硼氢化反应,得到相应的α‑硼取代产物。本发明方法具有反应条件温和,操作简便,区域选择性好,官能团兼容性好,反应效率高等优点。
Description
技术领域
本发明属于有机化合物合成及应用技术领域,具体涉及一种缺电子烯烃的α-选择性硼氢化反应方法。
背景技术
有机含硼化合物在合成化学、药物化学和材料科学等领域具有广泛应用,烯烃的硼氢化反应是制备有机含硼化合物最有效的方法之一。一直以来,缺电子烯烃普遍应用于亲核性的β-硼化反应进而得到官能团β-硼取代产物,而很少用于直接制备α-硼取代化合物。这是因为α-硼取代化合物非常不稳定,容易发生1,3-硼迁移,因此,开发缺电子烯烃的硼氢化反应合成稳定的α-硼取代化合物的方法具有重要价值。
目前,已经有一些文献报道制备α-硼取代化合物,但是这些方法仍存在一些缺点。例如,用分子内含有配位基团的α,β-不饱和酯进行硼氢化反应是较早报导的方法之一(Chemische Berichte 1977,110,2818),虽然亚胺基团可以提高产物的稳定性,便于分离,但是底物制备过于复杂。此外,路易斯碱-硼烷络合物与重氮酮或重氮酯在碘单质催化剂(J.Am.Chem.Soc.2013,135,12076)、金属铜催化剂(J.Am.Chem.Soc.2013,135,14094)、金属铑催化剂(J.Am.Chem.Soc.2015,137,5268)或酶催化剂(Nature,2017,552,132)的作用下也可以制备稳定的α-羰基硼化合物。但是这些方法需要使用重氮化合物作为原料,它们制备比较繁琐,并且还存在一定的安全隐患。因此,发展一种原料易得,选择性好,适用范围广,并且安全可靠的α-硼取代化合物的制备方法仍具有重大意义。
《自然通讯》(Nat.Commun.2019,10,1934)和《化学通讯》(Chem.Commun.2019,55,11904)介绍了一种用氮杂环卡宾硼烷和缺电子烯烃发生自由基硼氢化反应,但是,该反应的引发仍依赖偶氮二异丁腈等需要热引发的自由基引发剂,因此该方法需要在较高的温度下进行。另外,氮杂环卡宾硼烷的制备仍然较为复杂且成本较高,不利于广泛应用。
因此,如何选择更容易制备的硼自由基前体,而且能在更温和的条件下被引发,进一步提高自由基硼氢化反应的可操作性和经济性成为亟待解决的问题。
发明内容
如前所述,虽然制备稳定的α-硼取代化合物的方法较多,但每种方法都有其局限性。本发明针对上述现有技术所存在的不足,提供了一种缺电子烯烃的α-选择性硼氢化反应方法。本发明以廉价易得的4-二甲氨基吡啶硼烷络合物(DMAP-BH3)为硼自由基前体,在室温和空气条件下,通过自由基硼氢化反应各种缺电子α,β-不饱和化合物,制得相应的α-硼取代产物。该反应条件温和,操作方便,官能团容忍性好,能够高选择性构建各种α-硼取代产物。
本发明缺电子烯烃的α-选择性硼氢化反应方法,是以4-二甲氨基吡啶硼烷络合物(DMAP-BH3)为硼自由基前体,以三乙基硼烷(Et3B)为自由基引发剂,在空气氛围、催化剂和溶剂的存在下于室温条件实现α,β-不饱和化合物的硼氢化反应,得到相应的α-硼取代产物。
所述α,β-不饱和化合物包括α,β-不饱和酯、α,β-不饱和酰胺、α,β-不饱和羧酸、α,β-不饱和腈、三氟甲基烯烃化合物、α,β-不饱和砜以及α,β-不饱和磷酸酯等;优选为α,β-不饱和酯、α,β-不饱和酰胺、α,β-不饱和羧酸、α,β-不饱和腈、三氟甲基烯烃化合物;所述α,β-不饱和化合物的结构通式如下所示:
上述通式中,R主要为芳基,EWG为酯基、酰胺基、羧基、氰基、三氟甲基、砜基、磷酸酯基中的一种。
所述溶剂可以为苯、甲苯、乙腈等,优选为甲苯。
所述催化剂为苯硫酚、4-甲氧基苯硫酚或叔十二硫醇,优选为苯硫酚。
所述α,β-不饱和化合物、4-二甲氨基吡啶硼烷、三乙基硼烷、催化剂投料的摩尔比为1:1.2:0.5:0.2-0.5,优先摩尔比为1:1.2:0.5:0.2。
本发明反应路线如下所示:
本发明原料中,缺电子烯烃的制备有多种方法,均为常规方法。例如,α,β-不饱和酯可以用芳香醛类衍生物与新制的膦叶立德在四氢呋喃中回流(Angew.Chem.Int.Ed.2015,54,12149-12152)(J.Am.Chem.Soc.2009,131,704),α,β-不饱和酰胺可以用相应的羧酸与草酰氯加热回流,生成相应的酰氯与胺类缩合(OrgLett.2014,16,436),其他缺电子的α,β-不饱和化合物可用其他方法合成,具体选择可由产物性质,分离难易等因素决定。
肉桂酸乙酯,是香料,药物及其他精细化工产品生产中的重要原料和反应中间体,是α,β-不饱和化合物中最具代表性的一类化合物。目前工艺上合成肉桂酸乙酯多采用在酸催化剂作用下苯甲醛和乙酸乙酯的酯化反应,原料易得,技术成熟,因此,对这类缺电子烯烃实现α位选择性合成肉桂酸乙酯硼取代化合物具有重要的学术意义和经济价值。
本发明中,三乙基硼采用四氢呋喃溶解的三乙基硼溶液或己烷溶解的三乙基硼溶液均可,优选用己烷溶解的三乙基硼溶液。
本发明缺电子烯烃的α-选择性硼氢化反应方法,具体制备过程描述如下:
在25mL Schlenk管中,空气氛围下,加入0.4mmol缺电子烯烃,再加入1.2当量4-二甲氨基吡啶硼烷,0.5当量三乙基硼(Et3B),2.5mL甲苯,最后用微量进样器加入0.2当量苯硫酚,将反应体系置于室温下搅拌,当TLC显示原料已经消耗完时,直接旋转蒸发除去溶剂,石油醚/乙酸乙酯混合溶剂作为洗脱剂,过硅胶柱分离,即可制得相应的α-硼取代产物。
与已有硼氢化反应方法相比,本发明具有如下的优点:
1、反应条件温和;2、区域选择性好;3反应操作简便;4底物适用范围广;5为构建α-硼取代产物提供新方法。
具体实施方式
下面结合具体的实施例对本发明技术方案作进一步分析说明。
实施例1:
将加有磁子的25mL封管加热干燥,冷却至室温后,加入0.417mmol肉桂酸乙酯,再加入1.2当量4-二甲氨基吡啶硼烷,0.5当量三乙基硼,2.5mL甲苯,最后用微量进样器加入0.2当量苯硫酚,将反应体系置于室温下搅拌9小时后,直接旋转蒸发除去溶剂,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),过硅胶柱分离,制得相应硼氢化产物110.7mg,产物产率85%,白色固体;熔点:80-81℃。
1H NMR(400MHz,CDCl3)δ1.02(3H,t,J=7.2Hz),2.22-2.29(1H,m),2.64(1H,dd,J=3.6,14.4Hz),2.93(1H,dd,J=10.8,14.2Hz),3.05(6H,s),3.88(2H,q,J=7.2Hz),6.47(2H,d,J=7.6Hz),7.04-7.10(1H,m),7.14-7.21(4H,m),7.94(2H,d,J=7.2Hz);13C NMR(100MHz,CDCl3)δ14.3,36.3,39.3,58.4,106.0,124.8,127.7,128.3,144.4,146.4,154.9,180.4;11B NMR(128.4MHz,CDCl3):δ-5.3(1B,s br);HRMS(ESI):m/z caled forC18H25BN2O2Na(M+Na)+:335.1907,found:335.1903.
实施例2:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率70%,白色固体;熔点:65-67℃。
1H NMR(400MHz,CDCl3)δ1.03(3H,t,J=7.2Hz),2.20-2.25(1H,m),2.29(3H,s),2.65(1H,dd,J=3.6,14.8Hz),2.92(1H,dd,J=10.4,14.8Hz),3.09(6H,s),3.89(2H,qd,J=2.0,7.2Hz),6.50(2H,d,J=7.6Hz),7.96-7.08(3H,m),7.16-7.21(1H,m),7.99(2H,d,J=7.2Hz);13C NMR(100MHz,CDCl3)δ14.4,19.5,33.3,39.4,58.5,106.1,125.0,125.3,128.6,129.6,136.0,142.5,146.6,155.0,180.6;11B NMR(128.4MHz,CDCl3):δ-4.5(1B,sbr);HRMS(ESI):m/z caled for C19H27BN2O2Na(M+Na)+:349.2063,found:349.2060.
实施例3:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率72%,白色固体;熔点:86-89℃。
1H NMR(400MHz,CDCl3)δ1.05(t,J=7.2Hz,3H),2.30~2.37(m,1H),2.79(dd,J=3.6,14.4Hz,1H),2.98(dd,J=10.8,14.4Hz,1H),3.10(s,6H),3.91(qd,J=0.8,7.2Hz,2H),6.48~6.55(m,2H),7.00~7.11(m,2H),7.22~7.32(m,2H),7.98~8.05(m,2H);13CNMR(100MHz,CDCl3)δ14.4,34.0,39.5,58.6,106.1,126.2,126.4,129.0,130.6,134.0,141.7,146.7,155.0,180.2;11B NMR(128.4MHz,CDCl3)δ-4.7(s br,1B).HRMS(ESI):m/zcaled for C18H24BClN2O2Na(M+Na)+:369.1517,found:349.1515.
实施例4:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率61%,白色固体;熔点:200-203℃。
1H NMR(400MHz,CDCl3)δ1.04(t,J=7.0Hz,3H),2.35(m,1H),2.86(dd,J=2.1,14.1Hz,1H),3.07~3.14(m,7H),3.89(q,J=6.8Hz,2H),6.52(q,J=6.4Hz,2H),7.14~7.18(m,1H),7.39~7.40(d,J=3.6Hz,2H),7.50(d,J=7.6Hz,1H),8.01(d,J=6.4Hz,2H);13C NMR(100MHz,CDCl3)δ14.4,34.9,39.5,58.7,106.2,112.2,118.5,125.6,129.7,132.2,132.4,146.6,148.5,155.1,179.7;11B NMR(128.4MHz,CDCl3)δ-6.4(s br,1B).HRMS(ESI):m/z caled for C19H24BN3O2Na(M+Na)+:360.1859,found:360.1859.
实施例5:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率51%,无色液体。
1H NMR(400MHz,CDCl3)δ1.05(t,J=7.2Hz,3H),2.25~2.31(m,1H),2.61(dd,J=3.2,14.4Hz,1H),2.84(dd,J=10.8,14.0Hz,1H),3.04(s,6H),3.91(q,J=7.2Hz,2H),5.30(s br,1H),6.45(d,J=7.2Hz,2H),6.51~6.80(m,3H),7.04(t,J=8.0Hz,1H),7.95(d,J=7.2Hz,2H);13C NMR(100MHz,CDCl3)δ14.4,34.0,39.5,58.6,106.1,126.2,126.4,129.0,130.6,133.9,141.7,146.7,155.1,180.3;11B NMR(128.4MHz,CDCl3)δ-6.5(s br,1B).HRMS(ESI):m/z caled for C18H25BN2O3Na(M+Na)+:351.1856,found:351.1858.
实施例6:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率69%,白色固体;熔点:131-133℃。
1H NMR(400MHz,CDCl3)δ1.06(t,J=7.2Hz,3H),2.27~2.34(m,1H),2.70(dd,J=3.6,14.4Hz,1H),2.97(dd,J=10.4,14.4Hz,1H),3.11(s,6H),3.92(q,J=7.2Hz,2H),6.51(d,J=7.2Hz,2H),7.26~7.32(m,2H),7.36~7.48(m,5H),7.56(d,J=7.2Hz,2H),8.01(d,J=7.2Hz,2H);13C NMR(100MHz,CDCl3)δ14.4,36.0,39.4,58.6,106.1,126.5,126.6,126.8,128.5,128.9,137.7,141.3,143.8,146.5,155.0,180.5;11B NMR(128.4MHz,CDCl3)δ-5.0(s br,1B).HRMS(ESI):m/z caled for C24H29BN2O2Na(M+Na)+:411.2220,found:411.2222.
实施例7:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率49%,无色液体。
1H NMR(400MHz,CDCl3)δ1.05(t,J=7.2Hz,3H),2.19~2.27(m,1H),2.56(dd,J=4.0,14.4Hz,1H),2.82~2.87(m,1H),2.86(s,6H),3.08(s,6H),3.90(q,J=7.2Hz,2H),6.49(d,J=7.6Hz,2H),6.61~6.65(m,2H),7.04~7.09(m,2H),7.94~8.01(m,2H);13C NMR(100MHz,CDCl3)δ14.5,35.3,39.5,41.1,58.5,106.1,113.1,129.0,133.3,146.7,148.6,155.0,180.8;11B NMR(128.4MHz,CDCl3)δ-4.5(s br,1B).HRMS(ESI):m/z caled forC20H31BN3O2(M+H)+:356.2509,found:356.2505.
实施例8:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率64%,白色固体;熔点:89-92℃。
1H NMR(500MHz,CDCl3)δ1.04(t,J=6.8Hz,3H),2.37~2.39(m,1H),2.82(dd,J=3.6,14.4Hz,1H),3.04(s,6H),3.90(q,J=7.2Hz,2H),6.45(d,J=6.4Hz,2H),7.35~7.40(m,3H),7.61(s,1H),7.66~7.75(m,3H),7.98(d,J=6.8Hz,2H);13C NMR(100MHz,CDCl3)δ14.4,36.6,39.4,58.6,106.1,124.5,125.3,126.2,127.1,127.3,127.4,128.0,131.7,133.6,142.1,146.6,155.0,180.5;11B NMR(128.4MHz,CDCl3)δ-6.1(1B,s br).HRMS(ESI):m/z caled for C22H27BN2O2Na(M+Na)+:385.2063,found:385.2063.
实施例9:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率73%,白色固体;熔点:146-148℃。
1H NMR(400MHz,CDCl3)δ1.06(t,J=7.2Hz,3H),2.31~2.38(m,1H),2.76(dd,J=3.6,14.4Hz,1H),3.00~3.07(m,1H),3.02(s,6H),3.87~3.95(m,2H),6.39~6.41(m,1H),6.41~6.45(m,2H),7.05(dd,J=1.6,8.4Hz,1H),7.08(t,J=2.8Hz,1H),7.19(d,J=8.0Hz,1H),7.41~7.45(m,1H),7.95~8.00(m,2H),8.19(s br,1H);13C NMR(100MHz,CDCl3)δ14.5,36.5,39.3,58.5,102.0,106.0,110.3,119.7,123.3,123.7,127.8,134.1,135.7,146.6,155.0,181.0;11B NMR(128.4MHz,CDCl3)δ-5.9(s br,1B).HRMS(ESI):m/zcaled for C20H26BN3O2Na(M+Na)+:374.2016,found:374.2010.
实施例10:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率57%,白色固体;熔点:86-87℃。
1H NMR(400MHz,CDCl3)δ1.08(t,J=7.2Hz,3H),2.22~2.30(m,1H),2.59(dd,J=4.0,16.0Hz,1H),2.93(dd,J=10.8,16.0Hz,1H),3.09(s,6H),3.90~4.00(m,2H),5.89~5.93(m,1H),6.19(dd,J=1.6,3.2Hz,1H),6.47~6.52(m,2H),7.21(dd,J=0.8,2.0Hz,1H),7.93~7.99(m,2H);13C NMR(100MHz,CDCl3)δ14.4,28.7,39.4,58.6,103.9,106.1,109.9,140.0,146.6,155.1,158.3,180.4;11B NMR(128.4MHz,CDCl3)δ-4.9(s br,1B).HRMS(ESI):m/z caled for C16H23BN2O3Na(M+Na)+:325.1699,found:325.1702.
实施例11:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率65%,白色固体;熔点:111-113℃。
1H NMR(400MHz,CDCl3)δ2.32~2.38(m,1H),2.69(d,J=15.6Hz,1H),3.01(s,6H),3.17(dd,J=6.4,15.6Hz,1H),6.39(d,J=7.6Hz,2H),6.81~6.86(m,1H),6.94(td,J=1.2,7.4Hz,1H),7.05~7.10(m,2H),7.81(d,J=7.2Hz,2H);13C NMR(100MHz,CDCl3)δ28.4,39.2,106.2,115.4,123.0,123.8,126.5,128.0,146.0,152.1,154.9,176.8;11B NMR(128.4MHz,CDCl3)δ-6.5(s br,1B).HRMS(ESI):m/z caled for C16H19BN2O2Na(M+Na)+:305.1437,found:305.1440.
实施例12:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率51%,白色固体;熔点:125-127℃。
1H NMR(400MHz,CDCl3)δ0.92(t,J=6.4Hz,3H),2.85~2.92(m,1H),3.06(s,6H),3.82(q,J=6.4Hz,2H),4.18(d,J=9.6Hz,1H),6.36(d,J=5.2Hz,2H),7.03(dt,J=6.0,12.4Hz,2H),7.13~7.17(m,4H),7.27(d,J=6.0Hz,2H),7.33(d,J=6.4Hz,2H),7.73(d,J=5.6Hz,2H);13C NMR(100MHz,CDCl3)δ14.2,39.4,53.0,58.6,105.9,125.2,125.3,127.4,127.90,127.94,128.5,145.7,146.7,147.6,154,9,179.9;11B NMR(128.4MHz,CDCl3)δ-6.9(s br,1B).HRMS(ESI):m/z caled for C24H29BN2O2Na(M+Na)+:411.2220,found:411.2219.
实施例13:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率66%,白色固体;熔点:126-129℃。
1H NMR(400MHz,CDCl3)δ2.35~2.43(m,1H),2.54(dd,J=3.6,13.2Hz,1H),2.83(dd,J=10.4,13.2Hz,1H),3.09(s,6H),3.36(dd,J=6.0,15.2Hz,1H),3.56(dd,J=5.2,17.6Hz,1H),4.20~4.30(m,1H),4.30~4.40(m,1H),4.69(dd,J=1.6,17.2Hz,1H),4.85(dd,J=1.2,10.4Hz,1H),5.02~5.12(m,2H),5.48~5.61(m,1H),5.67~5.79(m,1H),6.46~6.53(m,2H),7.00~7.09(m,1H),7.11~7.18(m,4H),7.92~8.01(m,2H);13C NMR(100MHz,CDCl3)δ37.1,39.3,47.0,48.8,105.8,115.2,115.4,124.7,127.6,128.8,134.1,135.0,145.0,146.9,155.1,180.0;11B NMR(128.4MHz,CDCl3)δ-5.4(s br,1B).HRMS(ESI):m/z caled for C22H30BN3ONa(M+Na)+:386.2374,found:386.2371.
实施例14:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率62%,白色固体;熔点:132-133℃。
1H NMR(400MHz,CDCl3)δ2.40~2.46(m,1H),2.51(dd,J=3.6,14.0Hz,1H),2.85(dd,J=10.0,14.0Hz,1H),3.10(s,6H),3.30~3.70(m,8H),4.47(dt,J=1.6,5.2Hz,2H),5.24(dq,J=1.6,10.4Hz,1H),5.37(dq,J=1.6,17.2Hz,1H),5.98~6.09(m,1H),6.46~6.53(m,2H),6.70~6.77(m,2H),7.01~7.07(m,2H),7.91~7.98(m,2H);13C NMR(100MHz,CDCl3)δ35.8,39.4,67.1,67.2,67.3,67.4,68.8,106.0,114.2,117.3,129.3,133.7,137.4,146.8,155.1,156.2,179.1;11B NMR(128.4MHz,CDCl3)δ-7.2(s br,1B).HRMS(ESI):m/z caled for C23H32BN3O3Na(M+Na)+:432.2434,found:432.2434.
实施例15:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率76%,白色固体;熔点:138-139℃。
1H NMR(400MHz,CDCl3)δ2.23~2.31(m,1H),2.68(dd,J=3.6,14.4Hz,1H),2.91(dd,J=10.4,14.4Hz,1H),3.06(s,6H),6.41(d,J=7.2Hz,2H),7.07~7.14(m,1H),7.17~7.25(m,4H),7.95(d,J=7.6Hz,2H);13C NMR(100MHz,CDCl3)δ36.1,39.5,106.3,125.1,127.9,128.5,144.4,146.5,155.1,185.2;11B NMR(128.4MHz,CDCl3)δ-24.4(s br,1B).HRMS(ESI):m/z caled for C16H21BN2O2Na(M+Na)+:307.1594,found:307.1590.
实施例16:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率65%,白色固体;熔点:93-95℃。
1H NMR(400MHz,CDCl3)δ1.93~2.02(m,1H),2.64(dd,J=11.2,14.0Hz,1H),2.80(dd,J=4.8,14.0Hz,1H),3.09(s,6H),6.54(d,J=7.6Hz,2H),7.14~7.20(m,1H),7.23~7.31(m,4H),8.09(d,J=7.2Hz,2H);13C NMR(100MHz,CDCl3)δ36.8,39.4,106.5,125.8,128.08,128.13,128.4,142.1,146.4,155.23;11B NMR(128.4MHz,CDCl3)δ-6.3(s br,1B).HRMS(ESI):m/z caled for C16H20BN3Na(M+Na)+:288.1648,found:288.1650.
实施例17:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率85%,无色液体。
1H NMR(400MHz,CDCl3)δ1.63(s br,1H),2.53(dd,J=8.8,13.6Hz,1H),2.86(dd,J=4.8,14.0Hz,1H),3.08(s,6H),3.81(s,3H),3.82(s,6H),6.38~6.46(m,4H),7.85(d,J=7.6Hz,2H);13C NMR(100MHz,CDCl3)δ34.7(q,J=4.0Hz),39.4,55.9,60.8,105.9,106.1,132.4(q,J=279.0Hz),135.5,139.0,146.6,152.6,154.9;11B NMR(128.4MHz,CDCl3)δ-7.7(s br,1B);19F NMR(376MHz,CDCl3)δ-63.6(d,J=12.4Hz,3F).HRMS(ESI):m/z caled forC19H26BF3N2O3Na(M+Na)+:421.1886,found:421.1897.
实施例18:
实验操作参考实施例1,石油醚/乙酸乙酯混合溶剂作为洗脱剂(v:v=2:1),产物收率25%,白色固体;熔点:128-130℃。
1H NMR(400MHz,CDCl3)δ2.65(dd,J=8.0,10.4Hz,1H),2.73~2.79(m,1H),2.89(dd,J=1.2,10.4Hz,1H),3.08(s,6H),6.44(d,J=5.6Hz,2H),6.93(d,J=5.6Hz,2H),7.08(t,J=5.6Hz,1H),7.13(t,J=6.0Hz,2H),7.45(t,J=8.0Hz,2H),7.51(t,J=5.6Hz,1H),7.86(d,J=6.0Hz,2H),7.96(d,J=5.6Hz,2H);13C NMR(100MHz,CDCl3)δ34.8,39.4,106.1,125.5,127.9,128.2,128.4,128.9,131.9,140.9,141.5,147.3,155.1;11B NMR(128.4MHz,CDCl3)δ-10.1(s br,1B).HRMS(ESI):m/z caled for C21H25BN2O2SNa(M+Na)+:403.1627,found:403.1626.
Claims (4)
2.根据权利要求1所述的方法,其特征在于:
α,β-不饱和化合物、4-二甲氨基吡啶硼烷、三乙基硼烷、催化剂投料的摩尔比为1:1.2:0.5:0.2-0.5。
3.根据权利要求2所述的方法,其特征在于:
α,β-不饱和化合物、4-二甲氨基吡啶硼烷、三乙基硼烷、催化剂投料的摩尔比为1:1.2:0.5:0.2。
4.根据权利要求1所述的方法,其特征在于包括如下步骤:
在25 mL Schlenk管中,空气氛围下,加入0.4 mmol α,β-不饱和化合物,再加入1.2当量4-二甲氨基吡啶硼烷,0.5当量三乙基硼,2.5 mL甲苯,最后加入0.2当量苯硫酚,将反应体系置于室温下搅拌,当TLC显示原料已经消耗完时,直接旋转蒸发除去溶剂,石油醚/乙酸乙酯混合溶剂作为洗脱剂,过硅胶柱分离,即可制得相应的α-硼取代产物。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011469689.4A CN112457338B (zh) | 2020-12-14 | 2020-12-14 | 一种缺电子烯烃的α-选择性硼氢化反应方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011469689.4A CN112457338B (zh) | 2020-12-14 | 2020-12-14 | 一种缺电子烯烃的α-选择性硼氢化反应方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN112457338A CN112457338A (zh) | 2021-03-09 |
CN112457338B true CN112457338B (zh) | 2022-01-14 |
Family
ID=74804012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011469689.4A Active CN112457338B (zh) | 2020-12-14 | 2020-12-14 | 一种缺电子烯烃的α-选择性硼氢化反应方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112457338B (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115894247A (zh) * | 2021-09-30 | 2023-04-04 | 迈克斯(如东)化工有限公司 | 一种1,3-二取代-2-丙酮类化合物的制备方法及其中间体 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040242817A1 (en) * | 2003-05-29 | 2004-12-02 | Lord Corporation | Internally coordinated organoboranes |
CN107188811B (zh) * | 2017-07-12 | 2019-02-19 | 阿里生物新材料(常州)有限公司 | 一种还原硫代酰胺类化合物的方法 |
US11667734B2 (en) * | 2019-02-14 | 2023-06-06 | Drexel University | Oxygen tolerant and room temperature raft through alkylborane initiation |
-
2020
- 2020-12-14 CN CN202011469689.4A patent/CN112457338B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN112457338A (zh) | 2021-03-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108525704A (zh) | 用于烯烃氢甲酰化反应的催化剂及其制备方法和应用 | |
CN110590841B (zh) | 一种氮磷配体及其制备方法和用途 | |
CN111484472B (zh) | 烷基腈类化合物的制备方法 | |
CN108912042B (zh) | 一种从芳香酸直接制备芳香酮的方法 | |
CN112457338B (zh) | 一种缺电子烯烃的α-选择性硼氢化反应方法 | |
CN115304506A (zh) | 一种硼盐催化激活伯酰胺用于仲酰胺类化合物的制备方法 | |
CN107629049B (zh) | 一种吡啶[2,1-a]并异吲哚类化合物的合成方法 | |
CN113387886B (zh) | 一种2-胺基二苯并[c,e]吖庚因化合物及其合成方法 | |
CN111635343B (zh) | 一种芳基单硫醚化合物的制备方法 | |
CN114773301A (zh) | 一种从末端炔烃与碘叶立德出发合成呋喃类化合物的方法 | |
CN109503656B (zh) | 一种手性诱导高效制备含r-/s-二芳基甲基取代手性有机膦酸酯的新方法 | |
CN113004109A (zh) | 一种手性α-羟基-β-酮酸酯类化合物的不对称合成方法 | |
CN111777479A (zh) | 一种手性含氮杂芳环化合物的催化不对称合成方法 | |
CN110804069B (zh) | 一种硫代膦(磷)酸酯取代的联烯化合物制备方法 | |
CN110483291B (zh) | 一种(E)-β-芳基-β,γ-不饱和酯化合物的合成方法 | |
CN113845550B (zh) | 一种含有卤代苯环的柔性大位阻n-杂环卡宾钯配合物和制备方法及其应用 | |
CN109810056B (zh) | S-烷基-s-喹啉基-n-磺酰基氮硫叶立德化合物及其制备和应用 | |
CN113831216B (zh) | 一种以醛类化合物为原料制备单氟代烯烃的合成方法 | |
CN108395380B (zh) | 一种1,3-环己二烯类化合物的合成方法 | |
CN115925739A (zh) | 一种含硫磷酸酯的联烯类化合物及其合成方法 | |
CN109096330A (zh) | 一种三氟甲基烯基膦酸酯及其制备方法 | |
CN104926747A (zh) | 具有光学活性的环己基噁唑啉配体的合成方法及其用途 | |
CN116969875A (zh) | 一种硫酯官能化2-氧代吲哚的合成方法 | |
CN117865894A (zh) | 不对称催化合成四氘代1-(n-甲基咪唑)-4-硝基-3-苯基丁-1-酮衍生物的方法 | |
CN118496160A (zh) | 一种咪唑类化合物的制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |