CN102295540A - 一种缩醛的制备方法 - Google Patents
一种缩醛的制备方法 Download PDFInfo
- Publication number
- CN102295540A CN102295540A CN2011101297435A CN201110129743A CN102295540A CN 102295540 A CN102295540 A CN 102295540A CN 2011101297435 A CN2011101297435 A CN 2011101297435A CN 201110129743 A CN201110129743 A CN 201110129743A CN 102295540 A CN102295540 A CN 102295540A
- Authority
- CN
- China
- Prior art keywords
- methyl
- dimethoxy
- methylbenzene
- dihydro
- compound
- 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.)
- Pending
Links
Images
Landscapes
- Plural Heterocyclic Compounds (AREA)
Abstract
1、一种1-(二甲氧基)甲基-2-甲基苯的合成方法,包括合成和分离,其特征在于所述的合成用20mol%1-[3-(4R)-4-R-4,5-二氢化-噁唑啉基-乙基]吡咯-2-酮(R:CH2CH(CH3)2,CH(CH3)2,CH2Ph,Ph)及1-[2-4(R)-R-4,5-二氢化-2-噁唑啉基]-六氢吡啶(R:CH2CH(CH3)2,CH(CH3)2)做催化剂,2-甲基苯甲醛1mmol,三甲基硅腈3mmol,用2mL无水甲醇做溶剂,室温反应3天后,柱层析分离,用石油醚/二氯甲烷(7/3)洗脱,将收集的第二组分点旋干,得化合物1-二甲氧基甲基-2-甲基苯。
Description
一、技术领域
本发明涉及一种化合物及其制备方法,特别涉及一种缩醛化合物及其制备方法,确
切地说是一种1-(二甲氧基)甲基-2-甲基苯的合成方法。
二、背景技术
1-(二甲氧基)甲基-2-甲基苯的合成方法相继有许多文献报道【1-7】
(1)Highly recyclable,imidazolium derived ionic liquids of low antimicrobial and antifungaltoxicity:A new strategy for acid catalysis.Myles,Lauren;Gore,Rohitkumar;Spulak,Marcel;Gathergood,Nicholas;Connon,Stephen J.,Green Chemistry(2010),12(7),1157-1162.
(2)Preparation and catalytic use of silica-polymer core-shell microspheres withimidazolium-styren e copolymer shells.Yamada,Yu-Dai;Qiao,Kun;Bao,Quan-Xi;Tomida,Daisuke;Nagao,Daisuke;Konno,Mikio;Yokoyama,Chiaki,Catalysis Communications(2009),11(4),227-231.
(3)Single-step conversion of electron-deficient aldehydes into the corresponding esters in aqueousalcohols in the presence of iodine and sodium nitrite.Kiran,Y.B.;Ikeda,Reiko;Sakai,Norio;Konakahara,Takeo,Synthesis(2010),(2),276-282.
(4)Pyridinium ion catalysis of carbonyl protection reactions.Procuranti,Barbara;Myles,Lauren;Gathergood,Nicholas;Connon,Stephen J.Synthesis(2009),(23),4082-4086.
(5)Unexpected catalysis:aprotic pyridinium ions as active and recyclable Bronsted acid catalystsin protic media.Procuranti,Barbara;Connon,Stephen J,Organic Letters(2008),10(21),4935-4938.
(6)Microwave-assisted preparation of 1-butyl-3-methylimidazolium tetrachlorogallate and itscatalytic use in acetal formation under mild conditions.Kim,Yong Jin;Varma,Rajender S.Tetrahedron Letters(2005),46(43),7447-7449.
(7)Photochemical Acetalization of Carbonyl Compounds in Protic Media Using an in SituGenerated Photocatalyst.de Lijser,H.J.Peter;Rangel,Natalie AnnJournal of OrganicChemistry(2004),69(24),8315-8322.
申请人在用1-[3-(4S)-4-R-4,5-二氢化-噁唑啉基-乙基]吡咯-2酮
R:CH2CH(CH3)2,CH(CH3)2,CH2Ph,Ph)及1-[2-4(R)-R-4,5-二氢化-2-噁唑啉基]-六氢吡啶(R:CH2CH(CH3)2,CH(CH3)2)做催化剂不对称催化2-甲基苯甲醛腈硅化反应过程中,不仅得到手性目标产物,而且又得到了一种1-二甲氧基甲基-2-甲苯。该催化剂已申请中国专利,申请号分别为20101079411.3,201110085498.2,20111085506.3,201110102687.6,201110069643.8,201110069671.X。
三、发明内容
本发明旨在提供化合物1-二甲氧基甲基-2-甲基苯。所要解决的技术问题是一步合成得到目标产物。
本合成方法包括合成和分离,所述的合成用20mol%1-[3-(4R)-4-R-4,5-二氢化-噁唑啉基-乙基]吡咯-2-酮(R:CH2CH(CH3)2,CH(CH3)2,CH2Ph,Ph)及1-[2-4(R)-R-4,5-二氢化-2-噁唑啉基]-六氢吡啶(R:CH2CH(CH3)2,CH(CH3)2)做催化剂,2-甲基苯甲醛1mmol,三甲基硅腈3mmol,用2mL无水甲醇做溶剂,室温反应3天后,柱层析分离,用石油醚/二氯甲烷(7/3)洗脱,将收集的第二组分点旋干,得化合物1-二甲氧基甲基-2-甲基苯。
催化剂的结构如下:
合成反应如下:
本合成方法一步得到目标产物,工艺简单,操作方便。
其反应机理可推测如下:
2-甲基苯甲醛与三甲基硅腈,在催化剂20mol%的1-[3-(4R)-4-R-4,5-二氢化-噁唑啉基-乙基]吡咯-2酮(R:CH2CH(CH3)2,CH(CH3)2,CH2Ph,Ph)及1-[2-4(R)-R-4,5-二氢化-2-噁唑啉基]-六氢吡啶(R:CH2CH(CH3)2,CH(CH3)2)做路易斯碱催化剂作用下,苯甲醛与甲醇进行缩合,得到化合物1-二甲氧基甲基-2-甲苯。
四、附图说明
图1是化合物1-二甲氧基甲基-2-甲基苯的NMR氢谱图。
图2是化合物1-二甲氧基甲基-2-甲基苯的NMR碳谱图。
五、具体实施方式
在25mL烧瓶中,加入2mL无水甲醇,2-甲基苯甲醛0.1mL(1mmol),三甲基硅腈3mmol,催化剂I和II(0.20mmol),将反应物在室温下搅拌3天,停止反应,柱层析分离,用石油醚/二氯甲烷(7/3)洗脱,将收集的第二组分点自然旋干得化合物1-二甲氧基甲基-2-甲基苯。其产率均在30%左右。1HNMR(500MHz,CDCl3,27℃),δ(ppm)=7.20~7.50(m,1H),7.11~7.20(m,3H),5.43(s,1H),3.3(s,6H),2.34(s,3H),13CNMR(125MHz,CDCl3,27℃)136.33,135.79,130.63,128.48126.67,125.52,101.93,53.12,18.98。HRMS(EI):m/z(%):calcd forC10H14O2:166.0994;found:166.0992。
手性催化剂I及II的合成
(一)手性噁唑啉化合物Ia的制备
在100mL两口瓶中,无水无氧条件下,加入无水ZnCl2 2g(14.7mmol),40mL氯苯,3-(1-六氢吡啶基)-丙腈6.5g,D-亮氨醇10g,将混合物在高温下回流24h,停止反应,减压以除去溶剂,,将剩余物用水溶解,并用CHCl3(20mLx2)萃取,有机相用无水硫酸钠干燥,旋转除去溶剂,将粗产品用石油醚/二氯甲烷(4∶1)柱层析,得无色油状液体产率65%;[a]5 D=+51.95°(c=0.32,CH2Cl2):1HNMR(300MHz,CDCl3,27℃),δ(ppm)=4.38(t,J=1.2H在,1H),4.13~4.18(m,1H),3.85(t,J=0.3Hz,1H),3.47~3.69(m,3H),2.57(t,J=0.3Hz,2H),2.43(t,2H),2.06~2.11(m,2H),1.79~1.81(m,1H),1.60~1.64(m,1H),1.30~1.34(m,1H),0.98~1.02(m,6H);13CNMR,18.11,22.72,22.83,25.48,26.68,30.95,39.52,45.61,47.38,64.67,73.15,164.88,175.05.IR(KBr压片):3438,2955,2870,1686,1495,1465,1425,1385,1367,1288,1225,1173,1069,984,942,655;HRMS(EI):m/z(%):calcd for C13H22N2O2:238.1681;found:238.1688。
(二)手性噁唑啉化合物Ib的制备
在100mL两口瓶中,无水无氧条件下,加入无水ZnCl2 2g(14.7mmol),40mL氯苯,3-(1-六氢吡啶基)-丙腈6.5g,D-缬氨醇10g,将混合物在高温下回流24h,停止反应,减压以除去溶剂,,将剩余物用水溶解,并用CHCl3(20mLx2)萃取,有机相用无水硫酸钠干燥,旋转除去溶剂,将粗产品用石油醚/二氯甲烷(4∶1)柱层析,得无色油状液体产率60%;[a]5 D=+7.67°(c=0.52,CHCl3):1HNMR(500MHz,CDCl3,27℃),δ(ppm)=4.21~4.26(m,1H),3.84~3.96(m,2H),3.59~3.63(m,2H),3.42~3.56(m,2H),2.52(t,2H),2.36(t,2H),2.02~2.07(m,2H),1.68~1.73(m,1H),0.86~0.97(dd,J=6.6Hz,6.6Hz,2H)13CNMR,17.99,18.16,18.81,26.54,30.89,32.54,39.47,47.29,70.17,72.19,165.01,174.94.IR(KBr压片):3304,2957,2871,2234,1671,1596,1496,1467,1387,1368,1289,1225,1172,1072,986,948,921,850,732,645;HRMS(EI):m/z(%):calcd for C12H20N2O2:225.1603;found:225.1583。
(三)手性噁唑啉化合物Ic的制备
在100mL两口瓶中,无水无氧条件下,加入无水ZnCl22g(14.7mmol),40mL氯苯,3-(1-六氢吡啶基)-丙腈6.3g,D-苯甘氨醇10g,将混合物在高温下回流24h,停止反应,减压以除去溶剂,,将剩余物用水溶解,并用CHCl3(20mLx2)萃取,有机相用无水硫酸钠干燥,旋转除去溶剂,将粗产品用石油醚/二氯甲烷(4∶1)柱层析,得无色油状液体产率60%;[a]5 D=+40.2°(c=0.298,CH2Cl2):1HNMR(300MHz,CDCl3,27℃),δ(ppm)=7.24~7.37(m,5H),5.17(t,J=0.3Hz,1H),4.59~4.66(m,1H),4.11(t,1H),3.46(t,J=0.9Hz,2H),2.65(t,3H),2.38(t,3H),1.99~2.04(m,6H);13CNMR,17.72,26.20,30,65,39.21,47.05,69.38,74.37,126.33,127.31,128.43,141.87,166.07,174.84.IR(KBr压片):3436,3029,2932,1733,1682,1494,1454,1385,1425,1378,1288,1226,1172,986,924,849,762,702,655,563,532,494。HRMS(EI):m/z(%):calcd for C15H18N2O2:258.1368;found:258.1373。
(四)手性噁唑啉化合物Id的制备
在100mL两口瓶中,无水无氧条件下,加入无水ZnCl2 1.1g(8.08mmol),40mL氯苯,3-(1-六氢吡啶基)-丙腈6.3g,D-苯丙氨醇10g,将混合物在高温下回流24h,停止反应,减压以除去溶剂,,将剩余物用水溶解,并用CHCl3(20mLx2)萃取,有机相用无水硫酸钠干燥,旋转除去溶剂,将粗产品用石油醚/二氯甲烷(4∶1)柱层析,得无色油状液体产率72%;[a]5 D=+31.5°(c=0.285,CH2Cl2):1HNMR(300MHz,CDCl3,27℃),δ(ppm)=7.16~7.26(m,5H),4.32~4.36(m,1H),4.14(t,J=0.5Hz,1H),3.91~3.95(m,1H),3.50~3.57(m,2H),3.36~3.40(m,3H),3.06~3.08(m,1H),2.51~2.63(m,3H),2.31~2.33(m,2H),1.97(t,J=1Hz,2H);13CNMR,22.59,22.81,25.34,45.47,64.87,72.89,114.34,117.71,118.12,128.64,129.11,146.38,163.33IR(KBr压片):3427,3060,3027,2966,1734,1682,1603,1496,1454,1379,1288,1226,1176,983,923,852,753,703,655,565,497。HRMS(EI):m/z(%):calcd forC16H20N2O2:272.1525;found:272.1523。
(五)手性噁唑啉化合物II a的制备
在100mL两口瓶中,无水无氧条件下,加入无水ZnCl2 2g(14.7mmol),40mL氯苯,3-(1-六氢吡啶基)-丙腈6.3g,D-亮氨醇10g,将混合物在高温下回流24h,停止反应,减压以除去溶剂,,将剩余物用水溶解,并用CHCl3(20mLx2)萃取,有机相用无水硫酸钠干燥,旋转除去溶剂,将粗产品用石油醚/二氯甲烷(4∶1)柱层析,得无色油状液体产率70%;[a]5 D=+30.40°(c=0.148,CHCl3):1HNMR(500MHz,CDCl3,27℃),δ(ppm)=4.26~4.30(m,1H),4.07~4.11(m,1H),3.77~3.79(m,1H),2.64~2.68(m,1H),2.41~2.48(m,4H),1.40~1.60(m,8H),1.23~1.25(m,2H),0.91~0.95(m,6H),13CNMR,22.68,22.77,24.28,25.35,25.93,26.07,45.61,53.72,54.19,54.93,55.34,64.52,72.74,166.04.IR(KBr压片):3307,2934,2869,2804,1668,1545,1468,1384,1367,1304,1273,1225,1172,1156,1116,1040,989,920,862,758,HRMS(EI):m/z(%):calcd for C14H26N2O:238.2045;found:238.2038.
(六)手性噁唑啉化合物II b的制备
在100mL两口瓶中,无水无氧条件下,加入无水ZnCl22g(14.7mmol),40mL氯苯,3-(1-六氢吡啶基)-丙腈6.3g,D-缬氨醇10g,将混合物在高温下回流24h,停止反应,减压以除去溶剂,,将剩余物用水溶解,并用CHCl3(20mLx2)萃取,有机相用无水硫酸钠干燥,旋转除去溶剂,将粗产品用石油醚/二氯甲烷(4∶1)柱层析,得无色油状液体产率70%;[a]5 D=+31.44°(c=0.572,CH2Cl2):1HNMR(300MHz,CDCl3,27℃),δ(ppm)=4.16~4.20(m,1H),3.90~3.92(m,2H),2.64~2.68(m,1H),2.64~2.68(m,1H),2.42~2.50(m,6H),1.71~1.75(m,1H),1.56~1.59(m,4H),1.41~1.43(m,3H),),0.85~0.95(dd,J=5.1,5.1Hz,6H);13CNMR,17.83,18.61,24.20,25.85,26.04,32.34,54.10,55.32,69.54,71.85,166.05;IR(KBr压片):3323,2934,2803,1671,1545,1468,1443,1383,1362,1304,1270,1226,1172,1156,1116,1041,920,862,758;HRMS(EI):m/z(%):calcd for C14H24N2O:224.1889;found:224.1894.
Claims (1)
1.一种1-(二甲氧基)甲基-2-甲基苯的合成方法,包括合成和分离,其特征在于所述的合成用20mol%1-[3-(4R)-4-R-4,5-二氢化-噁唑啉基-乙基]吡咯-2-酮(R:CH2CH(CH3)2,CH(CH3)2,CH2Ph,Ph)及1-[2-4(R)-R-4,5-二氢化-2-噁唑啉基]-六氢吡啶(R:CH2CH(CH3)2,CH(CH3)2)做催化剂,2-甲基苯甲醛1mmol,三甲基硅腈3mmol,用2mL无水甲醇做溶剂,室温反应3天后,柱层析分离,用石油醚/二氯甲烷(7/3)洗脱,将收集的第二组分点旋干,得化合物1-二甲氧基甲基-2-甲基苯。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011101297435A CN102295540A (zh) | 2011-05-18 | 2011-05-18 | 一种缩醛的制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011101297435A CN102295540A (zh) | 2011-05-18 | 2011-05-18 | 一种缩醛的制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN102295540A true CN102295540A (zh) | 2011-12-28 |
Family
ID=45356248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011101297435A Pending CN102295540A (zh) | 2011-05-18 | 2011-05-18 | 一种缩醛的制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102295540A (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102432442A (zh) * | 2012-01-16 | 2012-05-02 | 罗梅 | 一种缩醛的制备方法 |
CN105924408A (zh) * | 2016-07-14 | 2016-09-07 | 罗梅 | 一种六氢吡啶盐酸盐的合成方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101824031A (zh) * | 2010-05-17 | 2010-09-08 | 合肥工业大学 | 一种手性噁唑啉及其用途 |
CN101973951A (zh) * | 2010-08-30 | 2011-02-16 | 罗梅 | 一种手性d-型噁唑啉及其用途 |
-
2011
- 2011-05-18 CN CN2011101297435A patent/CN102295540A/zh active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101824031A (zh) * | 2010-05-17 | 2010-09-08 | 合肥工业大学 | 一种手性噁唑啉及其用途 |
CN101973951A (zh) * | 2010-08-30 | 2011-02-16 | 罗梅 | 一种手性d-型噁唑啉及其用途 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102432442A (zh) * | 2012-01-16 | 2012-05-02 | 罗梅 | 一种缩醛的制备方法 |
CN102432442B (zh) * | 2012-01-16 | 2013-09-25 | 罗梅 | 一种缩醛的制备方法 |
CN105924408A (zh) * | 2016-07-14 | 2016-09-07 | 罗梅 | 一种六氢吡啶盐酸盐的合成方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Wang et al. | Recent advances in catalytic asymmetric reactions of o-quinone methides | |
Hu et al. | Recent advances in catalytic stereocontrolled cycloaddition with terminal propargylic compounds | |
Nicolai et al. | Pd (0)-catalyzed alkene oxy-and aminoalkynylation with aliphatic bromoacetylenes | |
Youn et al. | Asymmetric domino multicatalysis for the synthesis of 3-substituted phthalides: Cinchonine/NHC cooperative system | |
Aitken et al. | Recent progress in the synthetic assembly of 2-cyclopentenones | |
Zhang et al. | A General and Practical Approach for the Synthesis of 1, 2, 4‐Trioxanes Catalyzed by Silica‐Ferric Chloride | |
Chintareddy et al. | P (PhCH2NCH2CH2) 3N catalysis of Mukaiyama aldol reactions of aliphatic, aromatic, and heterocyclic aldehydes and trifluoromethyl phenyl ketone | |
He et al. | Organocatalytic approach for assembling flavanones via a cascade 1, 4-conjugate addition/oxa-michael addition between propargylamines with water | |
Raimondi et al. | Activation of 1, 2-and 1, 3-ketoamides with thiourea organocatalyst for the enantioselective domino synthesis of functionalized cyclohexanes | |
Kumar et al. | Perchloric acid adsorbed on silica gel (HClO4-SiO2) as an inexpensive, extremely efficient, and reusable dual catalyst system for acetal/ketal formation and their deprotection to aldehydes/ketones | |
Handy | Deep eutectic solvents in organic synthesis | |
Li et al. | Research progress on the catalytic enantioselective synthesis of axially chiral allenes by chiral organocatalysts | |
Sun et al. | Chiral Titanium Coordination Assemblies: Robust Cooperative Self‐Supported Catalysts for Asymmetric Ring Opening of meso‐Epoxides with Aliphatic Amines | |
CN102600897A (zh) | 一种新型手性催化体系的设计及其在抗肿瘤药物spisulosine(ES-285)合成中的应用 | |
Das et al. | A simple and efficient metal-free synthesis of tetrasubstituted pyrroles by iodine-catalyzed four-component coupling reaction of aldehydes, amines, dialkyl acetylenedicarboxylates, and nitromethane | |
Yuan et al. | Enantioselective synthesis of chiral 1, 2-amino alcohols via asymmetric hydrogenation of α-amino ketones with chiral Spiro iridium catalysts | |
CN104892614A (zh) | 一种6H-异吲哚并[2,1-α]吲哚-6-酮衍生物的合成方法 | |
CN102295540A (zh) | 一种缩醛的制备方法 | |
Liang et al. | Silver (I)-catalyzed reductive cross-coupling of aldehydes to structurally diverse cyclic and acyclic ethers | |
Nair et al. | N-heterocyclic carbene catalyzed reaction of enals and diaryl-1, 2 diones via homoenolate: Synthesis of 4, 5, 5-trisubstituted γ-butyrolactones | |
An et al. | Asymmetric domino double Michael addition of nitroolefins and aldehyde esters with trans-perhydroindolic acid as an organocatalyst | |
Witte et al. | Amine-catalyzed cascade reactions of unprotected and unactivated carbohydrates: direct access to C-glycosides | |
CN101293877A (zh) | 一种制备噻唑烷二酮类衍生物的方法 | |
Zhang et al. | Rapid Construction of Tricyclic Furanobenzodihydropyrans by Asymmetric Tandem Reaction | |
Yan et al. | Zinc-Catalyzed Asymmetric Cascade Michael/Acyl Transfer Reaction between α-Hydroxy Aryl Ketones and Enynones |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C12 | Rejection of a patent application after its publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111228 |