具体实施方式
以下结合具体实施例对本发明予以进一步详述。
不同反应条件对本发明的影响,见表1。
表1
编号 | 铁盐 | 碱 | 原料比 | 收率 |
1 | Fe(OAc)2 | NaOt-Bu | 1:1 | 15 |
2 | FeSO4 | NaOt-Bu | 1:1 | 42 |
3 | FeBr2 | NaOt-Bu | 1:1 | nr |
4 | FeBr | NaOt-Bu | 1:1 | 53 |
5 | FeI2 | NaOt-Bu | 1:1 | 79 |
6 | FeI2 | Na2CO3 | 1:1.2 | nr |
7 | FeI2 | K3PO4 | 1:1.2 | 41 |
8 | FeI2 | NaOt-Bu | 1:1.2 | 81 |
本发明是这样实现的,在一个25 mL的圆底烧瓶中分别加入3 mmol 取代苯硫酚化合物和3.6mmol的取代2,4-苯戊二烯酸,然后依次加入0.6 mmol 亚铁盐,0.6 mmol的烯胺酮配体,6 mmol的叔丁醇钠,10mL 二氯甲烷、,反应在100oC下搅拌8小时。冷却后向体系中加入10 mL饱和氯化钠水溶液,用乙酸乙酯萃取3次,每次10 mL,合并有机相,用无水硫酸钠干燥后,蒸除溶剂,200-300目的硅胶柱层析得纯品,产率79-90%,反应式和数据如下,所有产物结构经过核磁共振和质谱结果对比得以确定。
不同取代的实施例对本发明产率的影响,见表2。
表2
实施例 | 取代基R1 | 取代基R2 | 产物 | 产率(%) |
1 | | | | 81 |
2 | | | | 76 |
3 | | | | 85 |
4 | | | | 82 |
5 | | | | 83 |
6 | | | | 89 |
7 | | | | 78 |
8 | | | | 77 |
本发明所涉及的产物波普数据:
5-苯基-3-苯硫基-2,4-戊二烯酸乙酯 (3a) 黄色固体; 熔点 111-113 oC;
1H NMR (500 MHz, CDCl3): δ 8.41 (dd, 1 H, J = 15.9 Hz, 0.8 Hz), 8.20 (d,2 H, J = 8.9 Hz), 7.57 (d, 2 H, J = 8.9 Hz), 7.50-7.55 (m, 2 H), 7.30-7.43(m, 4 H), 6.73 (m, 1 H), 5.90 (m, 1 H), 4.23 (q, 2 H), 1.35 (t, 3 H);
13C NMR (125 MHz, CDCl3): 160.8 (C), 145.9 (C), 142.8 (C), 140.7 (C),136.9 (CH), 133.7 (CH), 129.0 (CH), 127.5 (CH), 126.8 (CH), 125.8 (CH), 122.4(CH), 121.3 (CH), 120.1 (CH), 58.6 (CH2), 11.3 (CH3);
ESI-HRMS m/z: Calcd for C19H19O2S+ [M+H]+: 311.1100; Found 311.0997。
二甲氧基)苯基-3-苯硫基-2,4-戊二烯酸乙酯 (3b) 黄色固体; 熔点102-103oC;
1H NMR (500 MHz, CDCl3): δ 8.25 (dd, 1 H, J = 16.0, 0.9 Hz), 7.49-7.56(m, 2 H), 7.40-7.46 (m, 3 H), 7.34 (d, 1 H, J = 16.0 Hz), 7.10-7.16 (m, 2 H),6.85 (d, 1 H, J = 12.7 Hz), 5.31 (s, 1 H), 4.11 (q, 2 H), 3.93 (s, 3 H), 3.91(s, 3 H), 1.23 (t, 3 H);
13C NMR (125 MHz, CDCl3): δ 165.5 (C), 155.7 (C), 150.1 (C), 149.1 (C),136.1 (CH), 135.1 (CH), 129.8 (CH), 129.7 (C), 129.4 (CH), 129.3 (C), 122.1(CH), 121.6 (CH), 112.8 (CH), 111.1 (CH), 109.7 (CH), 59.9 (CH2), 55.9 (CH3),55.9 (CH3), 14.3 (CH3);
ESI-HRMS m/z: Calcd for C21H23O4S+ [M+H]+: 371.1312; Found 371.1309。
二甲氧基)苯基-3-(2-甲基)苯硫基-2,4-戊二烯酸乙酯 (3c) 黄色固体; 熔点78-82 ᵒC;
1H NMR (500 MHz, CDCl3): δ 8.26 (dd, 1 H, J = 16.1, 0.8 Hz), 7.53 (d, 1H, J = 7.2 Hz), 7.34-7.41 (m, 3 H), 7.25-7.29 (m, 1 H), 7.10-7.17 (m, 2 H),6.86 (d, 1 H, J = 12.3 Hz), 5.05 (s, 1 H), 4.11 (q, 2 H), 3.94 (s, 3 H), 3.91(s, 3 H), 2.44 (s, 3 H), 1.23 (t, 3 H);
13C NMR (125 MHz, CDCl3): δ 165.5 (C), 155.0 (C), 150.1 (C), 149.2 (C),143.0 (C), 136.8 (CH), 135.8 (CH), 131.2 (CH), 130.3 (CH), 129.3 (C), 128.9(C), 127.3 (CH), 122.2 (CH), 121.5 (CH), 111.1 (CH), 110.9 (CH), 109.7 (CH),59.8 (CH2), 56.0 (CH3), 20.5 (CH3), 14.4 (CH3);
ESI-HRMS m/z: Calcd for C22H25O4S+ [M+H]+: 385.1468; Found 385.1465。
二甲氧基)苯基-3-(3-甲基)苯硫基-2,4-戊二烯酸乙酯 (3d) 黄色固体; 熔点:69-70 ᵒC;
1H NMR (500 MHz, CDCl3): δ 8.23 (dd, 1 H, J = 16.1, 0.8 Hz), 7.29-7.39(m, 4 H), 7.19-7.25 (m, 1 H), 7.07-7.16 (m, 2 H), 6.85 (d, 1 H, J = 12.2 Hz),5.31 (s, 1 H), 4.12 (q, 2 H), 3.94 (s, 3 H), 3.91 (s, 3 H), 2.38 (s, 3 H),1.24 (t, 3 H);
13C NMR (125 MHz, CDCl3): δ 165.5 (C), 156.0 (C), 150.1 (C), 149.2 (C),139.7 (C), 136.0 (CH), 135.7 (CH), 132.2 (CH), 130.3 (CH), 129.8 (C), 129.6(CH), 129.3 (C), 122.2 (CH), 121.6 (CH), 112.6 (CH), 111.1 (CH), 109.7 (CH),59.9 (CH2), 55.9 (2 CH3), 21.3 (CH3), 14.4 (CH3);
ESI-HRMS m/z: Calcd for C22H25O4S+ [M+H]+: 385.1468; Found 385.1465。
二甲氧基)苯基-3-(4-甲基)苯硫基-2,4-戊二烯酸乙酯 (3e) 黄色固体; 熔点109-112 ᵒC;
1H NMR (500 MHz, CDCl3): δ 8.23 (dd, 1 H, J = 16.1, 0.7 Hz), 7.41 (m, 3H), 7.23 (m, 2 H), 7.12 (m, 2 H), 6.85 (d, 1 H, J = 12.3 Hz), 5.25 (s, 1 H),4.13 (q, 2 H), 3.93 (s, 3 H), 3.91 (s, 3 H), 2.40 (s, 3 H), 1.24 (t, 3 H);
13C NMR (125 MHz, CDCl3): δ 165.5 (C), 156.5 (C), 150.1 (C), 149.1 (C),139.9 (C), 135.8 (CH), 135.4 (CH), 130.6 (CH), 129.3 (C), 126.3 (C), 122.2(CH), 121.5 (CH), 111.9 (CH), 111.1 (CH), 109.7 (CH), 59.8 (CH2), 55.9 (CH3),55.9 (CH3), 21.4 (CH3), 14.4 (CH3);
ESI-HRMS m/z: Calcd for C22H25O4S+ [M+H]+: 385.1468; Found 385.1465。
二甲氧基)苯基-3-(4-甲氧基)苯硫基-2,4-戊二烯酸乙酯 (3f) 黄色固体; 熔点Mp 127-130 ᵒC;
1H NMR (500 MHz, CDCl3): δ 8.22 (dd, 1 H, J = 16.2, 0.9 Hz), 7.46 (d, 2H, J = 8.9 Hz), 7.36 (d, 1 H, J = 16.2 Hz), 7.15-7.10 (m, 2 H), 6.97 (d, 2 H,J = 8.9 Hz), 6.85 (d, 1 H, J = 12.1 Hz), 5.17 (s, 1 H), 4.11 (q, 2 H), 3.94(s, 3 H), 3.91 (s, 3 H), 3.86 (s, 3 H), 1.24 (t, 3 H);
13C NMR (125 MHz, CDCl3): δ 165.6 (C), 161.0 (C), 157.3 (C), 150.2 (C),149.1 (C), 137.4 (CH), 135.5 (CH), 129.3 (C), 122.1 (CH), 121.4 (CH), 120.0(C), 115.5 (CH), 111.3 (CH), 111.1 (CH), 109.8 (CH), 59.9 (CH2), 56.1 (2 CH3),55.3 (CH3), 14.3 (CH3);
ESI-HRMS m/z: Calcd for C22H25O5S+ [M+H]+: 401.1417; Found 401.1414。
二甲氧基)苯基-3-(4-氟)苯硫基-2,4-戊二烯酸乙酯 (3g) 黄色固体; 熔点113-115 ᵒC;
1H NMR (500 MHz, CDCl3): δ 8.22 (dd, 1 H, J = 16.1, 0.8 Hz), 7.50-7.55(m, 2 H), 7.34 (d, 1 H, J = 16.1 Hz), 7.08-7.17 (m, 4 H), 6.86 (d, 1 H, J =12.3 Hz), 5.21 (s, 1 H), 4.12 (q, 2 H), 3.94 (s, 3 H), 3.91 (s, 3 H), 1.24(t, 3 H);
13C NMR (125 MHz, CDCl3): δ 165.3 (C), 162.0 (C), 155.9 (C), 150.2 (C),149.2 (C), 137.6 (CH), 136.1 (CH), 129.2 (C), 125.3 (C, d), 121.9 (CH), 121.3(CH), 117.3 (CH), 112.3 (CH), 111.1 (CH), 109.7 (CH), 59.9 (CH2), 55.9 (CH3),55.9 (CH3), 14.3 (CH3);
ESI-HRMS m/z: Calcd for C21H22FO4S+ [M+H]+: 389.1217; Found 389.1214。
二甲氧基)苯基-3-(4-三氟甲基)苯硫基-2,4-戊二烯酸乙酯(3h) 黄色固体; 熔点 77-78 ᵒC;
1H NMR (500 MHz, CDCl3): δ 8.23 (dd, 1 H, J = 14.9, 0.4 Hz), 7.56-7.64(m, 4 H), 7.33 (d, 1 H, J = 14.9 Hz), 7.06-7.12 (m, 2 H), 6.84 (d, 1 H, J =12.2 Hz), 5.60 (s, 1 H), 4.16 (q, 2 H), 3.93 (s, 3 H), 3.90 (s, 3 H), 1.28(t, 3 H);
13C NMR (125 MHz, CDCl3): δ 165.2 (C), 152.7 (C), 150.4 (C), 149.2 (C),137.6 (CH), 135.0 (C), 133.1 (CH), 130.6 (C), 129.0 (C), 127.6 (C), 126.4(CH), 121.8 (CH), 121.7 (CH), 116.5 (CH), 111.1 (CH), 109.7 (CH), 60.2 (CH2),55.9 (CH3), 55.9 (CH3), 14.3 (CH3);
ESI-HRMS m/z: Calcd for C22H22F3O4S+ [M+H]+: 439.1185; Found 439.1182。