In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 628-21-7, name is 1,4-Diiodobutane belongs to iodides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Formula: C4H8I2
Example 1: Synthesis of dimethyl 3,3′-(3,3′-(butane-l,4-diyl)bis(5-methyl-2,4-dioxo- 3,4-dihydropyrimidine-3,l(2H)-diyl))dipropanoate or butyl- linked bis-(thymine propanoate).[70] The title compound was synthesized according to the reaction scheme depicted in Figure 2. Thymine propanoate (1.4 g, 6.8 mmol) was dissolved in anhydrous DMF (10 mL) at 70 C. K2CO3 (1.1 g, 8.2 mmol) was added, and the mixture was stirred for 5 min before the addition of diiodobutane (0.84 g, 2.7 mmol). After 48 hours, the insoluble white material was collected by filtration. The solids were suspended in distilled H20 to dissolve K2C03, and precipitate the products. The insoluble material was collected by filtration, washed with distilled H20, and recrystallised from hot EtOH. Mp. 189 C; Yield: 0.72 g (89 %). MS (ESI): calculated for [C22H23N408]+: m/z 478.2; Found: m/z 479.1 (M+l), 501.1 (M+Na). 1H- NMR (400 MHz, CDC13): deltaEta 7.14 (d, J = 1.2 Hz 2H, CH), 3.96 (t, J = 6.4 Hz, 8H, 2 x N3- CH2, 2 x NI-CH2), 2.77 (t, J = 6.4 Hz, 4H, N1-C-CH2), 1.90 (d, J = 1.2 Hz, 6H, C-CH3), 1.68 (m, J = 3.2 Hz, 4H, (CH2)2). 13C-NMR (200 MHz, CDC13): 5C 151.47, 139.52, 109.66, 61.17 (C-CH3), 52.16 (O-CH3), 45.96 (CH2), 41.22 (CH2), 33.11 (CH2), 25.42 ((CH2)2), 13.15 (C- CH3). IR (KBr, cm”1): 1730 (v COOR
The synthetic route of 628-21-7 has been constantly updated, and we look forward to future research findings.