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. 4117-09-3, name is 7-Bromo-1-heptene, A new synthetic method of this compound is introduced below., Product Details of 4117-09-3
Mg shavings (939 mg, 38.6 mmol) are suspended in Et2O (20 ml)and 1-bromohept-6-ene (3.385 g, 19.115 mmol) is added dropwise. Thereaction mixture is stirred at RT for 3 h. Then the Grignard reagent isadded to EtOSiCl3 (945 mg, 5.150 mmol), dissolved in Et2O (20 ml), at 0 C via cannula. The reaction mixture is allowed to warm to RT andthen stirred for 2 h. Subsequently, 20 ml of the solvent are removed invacuo and 20 ml of hexanes are added to precipitate the salts formedduring the Grignard reaction. The reaction mixture is ffiltered throughcelite and the solvent removed in vacuo. The crude product is purifiedby column chromatography (SiO2, hexanes : ethylacetate=8 : 1) and 2 from the first fraction. The colorless liquid 2d (510 mg, 0.778 mmol) isisolated from the second fraction as the major product in 30% yield. Tris(hept-6-enyl)ethoxysilane 21H NMR (CDCl3, 499.7 MHz): X (ppm)=5.81 (ddt,3Jtrans(1H-1H)=16.9, 3 Hz, 3Jcis(1H-1H) =10.2 Hz, 3J(1H-1H) =6.7 Hz,3H, H6), 4.99 (ddt, 3Jtrans(1H-1H) =17.1 Hz, 2J(1H-1H) =2.1 Hz, 4J(1H-1H) =1.5 Hz, 3H, H7Z), 4.93 (ddt, 3Jcis(1H-1H) =10.2 Hz, 2J(1H-1H) =2.3 Hz, 4J(1H-1H) =1.1 Hz, 3H, H7E), 3.65 (q, 3J(1H-1H)=6.9 Hz, 2H, H8), 2.00-2.07 (m, 6H, H5), 1.30-1.41 (m, 18H, overlappingH2, H3, H4), 1.17 (t, 3J(1H-1H) =6.9 Hz, 2H, H9), 0.56-0.61(m, 6H, H1); 13C{1H} NMR (CDCl3, 125.7 MHz): X (ppm)=139.21(C6), 114.11 (C7), 58.37 (C8), 33.73 (C5*), 33.11 (C3*), 28.57 (C4),23.02 (C2), 18.65 (C9), 13.59 (C1), *assignments interchangeable; 29Si{1H} NMR (CDCl3, 79.4 MHz): X (ppm)=15.36 (s).Hexakis(hept-6-enyl)disiloxane 2d.1H NMR (CDCl3, 499.7 MHz): X (ppm)=5.81 (ddt, 3Jtrans(1H-1H)=16.9 Hz, 3Jcis(1H-1H) =10.2 Hz, 3J(1H-1H) =6.7 Hz, 6H, H6), 4.99(ddt, 3Jtrans(1H-1H) =17.1 Hz, 2J(1H-1H) =2.1 Hz, 4J(1H-1H) =1.5 Hz,6H, H7Z), 4.93 (ddt, 3Jcis(1H-1H) =10.2 Hz, 2J(1H-1H) =2.2 Hz, 4J(1H-1H) =1.2 Hz, 6H, H7E), 2.04 (dt, 3J(1H-1H) =6.7 Hz, 3J(1H-1H)=6.6 Hz, 12H, H5), 1.30-1.43 (m, 36H, overlapping H2, H3, H4), 0.56-0.61 (m, 12H, H1); 13C{1H} NMR (CDCl3, 125.7 MHz): X(ppm)=139.16 (C6), 114.15 (C7), 33.69 (C5*), 33.01 (C3*), 28.57(C4), 22.91 (C2), 14.99 (C1), *assignments interchangeable
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:
Article; Guenther; Reibenspies; Bluemel; Molecular catalysis; vol. 479; (2019);,
Bromide – Wikipedia,
bromide – Wiktionary