The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 354574-31-5, name is 2-Iodo-6-methoxyaniline, A new synthetic method of this compound is introduced below., Formula: C7H8INO
EXAMPLE 2 Total Synthesis of Azagalanthamine 2.1 2-(1,4-dioxaspiro[4.5]dec-7-en-8-yl)-N-(2′-iodo-6′-methoxyphenyl)acetamide (16); A solution of (1,4-dioxaspiro[4.5]dec-7-en-8-yl) acetic acid (567 mg; 2.86 mmol; 1 eq) (7) and 2-iodo-6-methoxyaniline (1 g; 2.86 mmol; 1 eq) in anhydrous dichloromethane (30 mL) is admixed with 2-chloro-1-methylpyridinium iodide (1.46 g; 5.73 mmol; 2 eq) and triethylamine (3.98 mL; 28.65 mmol; 10 eq). The reaction mixture is heated at reflux for 20 hours. After cooling and acidification with iN HCl solution to pH=5-6, the mixture is extracted with dichloro-methane. The organic phases are washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate and evaporated under vacuum. Purification by flash chromatography on silica gel (eluent: heptane/ethyl acetate 4/6) gives 1.10 g of 2-(1,4-di-oxaspiro[4.5]dec-7-en-8-yl)-N-(2′-iodo-6′-methoxy-phenyl)acetamide (16) in the form of a yellow foam (yield: 90%). Elemental analysis calculated for C17H20INO4 (m.p.: 429.25) C, 47.57; H, 4.70; N, 3.26; O, 14.91; found C, 47.39; H, 4.59; N, 3.01; O, 15.16. IR (CHCl3) nu (cm-1): 3382 (N-H); 1687 (CO) MS (ES) m/z: 429.8 [M+H]+. 1H NMR (CDCl3; 300 MHz) delta (ppm): 7.43 (dd, J=8.0, J=1.2; 1H; H3′); 7.18 (broad s; 1H; NH); 6.98 (t, J=8.0; 1H; H4′); 6.91 (dd, J=8.0, J=1.2; 1H; H5′); 5.72 (broad s; 1H; H4); 3.99 (s; 4H; Hdioxolane); 3.80 (s; 3H; OCH3); 3.15 (s; 2H; H2); 2.45 (broad s; 1H; H8); 2.37 (broad s; 1H; H5); 2.37 (broad s; 2H; H6); 1.85 (t, J=6.4; 2H; H7). 13C NMR (CDCl3; 62.9 MHz) delta (ppm): 169.2 (C(O)NH); 155.5 (C6′); 132.9 (Cl’); 130.8 (C3′); 129.6 (C4′); 128.1 (C8); 124.9 (C7); 111.7 (C5′); 107.7 (C5); 99.8 (C2′); 64.8 (Cdioxolane); 56.1 (OCH3); 45.7 (C2); 35.9 (C6); 38.2 (C4); 35.0 (C3).
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; Thal, Claude; Guillou, Catherine; Beunard, Jean-Luc; Gras, Emmanuel; Potier, Pierre; US2005/65338; (2005); A1;,
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com