CN102295540A - 一种缩醛的制备方法 - Google Patents

一种缩醛的制备方法 Download PDF

Info

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
Application number
CN2011101297435A
Other languages
English (en)
Inventor
罗梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN2011101297435A priority Critical patent/CN102295540A/zh
Publication of CN102295540A publication Critical patent/CN102295540A/zh
Pending legal-status Critical Current

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

一种缩醛的制备方法
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:
Figure BSA00000499080900021
合成反应如下:
Figure BSA00000499080900022
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。
CN2011101297435A 2011-05-18 2011-05-18 一种缩醛的制备方法 Pending CN102295540A (zh)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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