One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine. 4897-84-1, formula is C5H9BrO2, Name is Methyl 4-bromobutanoate, Recommanded Product: Methyl 4-bromobutanoate
Han, Hae Ji;Lee, Sung-Sik;Kang, Seok Min;Kim, Yerin;Park, Chanho;Yoo, Suah;Kim, Chul Hee;Oh, Young-Ho;Lee, Sungyul;Kim, Dong Wook research published 《 The Effects of Structural Modifications of Bis-tert-alcohol-Functionalized Crown-Calix[4]arenes as Nucleophilic Fluorination Promotors and Relations with Computational Predictions》, the research content is summarized as follows. The authors prepared four structurally modified bis-tert-alc. functionalized crown ether-strapped calix[4]arene promoters, i.e., bis-tert-alc. functionalized crown-5-calix[4]arene (BA5C), bis-tert-alc. functionalized crown-7-calix[4]arene (BA7C), bis-1,1-dimethylbutanol functionalized crown 6-calix[4]arene (B3A6C), and bis-1,1-dimethylhexanol functionalized crown 6-calix[4]arene (B5AC6C). Nucleophilic fluorinations were conducted using alkali metal fluorides to study phase-transfer catalytic activities with respect to the sizes of crown ether-strapped calix[4]arene (CEC) subunits and lengths of alkyl chain spacers between tert-alc. and CEC subunits. The reactivity of potassium fluoride was significantly enhanced by BA5C promoter because its crown-5-calix[4]arene subunit had cavity size appropriate for K+ capture. In contrast, BA7C did not efficiently enhance cesium fluoride SN2 fluorination because its crown-7-calix[4]arene cavity was too large to capture Cs+. The alkyl spacer of bis-tert-alc. functionalized CEC provided sufficient distance between F– and Cs+. In particular, the three-component alkyl carbon chain of B3A6C was optimal in terms of increasing CsF reactivity. Systematic quantum chem. anal. predicted that fluorination reactions facilitated by bis-tert-alc.-substituted crown-6-calix[4]arene (BACCA) and B3A6C might proceed via separated ion-pair type pre-reaction complexes, which suggested that these two promotors act as Lewis bases that essentially sep. CsF ion-pairs. The lower (by 0.4 kcal/mol) Gibbs free energy of activation for the reaction promoted by B3A6C than that facilitated by BACCA concurred with the exptl. observed slightly greater efficiency of B3A6C than BACCA.
Recommanded Product: Methyl 4-bromobutanoate, Methyl 4-bromobutyrate,also as known as 4-Bromobutyric acid methyl ester, is a useful research compound. Its molecular formula is C5H9BrO2 and its molecular weight is 181.03 g/mol. The purity is usually 95%.
4-Bromobutyric acid methyl ester is a synthetic compound that can be used to inhibit the activity of the G1 phase cyclin-dependent kinases. It has been shown to inhibit protein synthesis by alkylating the amino groups of proteins and fatty acids. 4-Bromobutyric acid methyl ester also inhibits the growth of cancer cell lines, such as renal carcinoma cells. The mechanism of action for this drug is not well understood, but it may be due to its ability to bind with monoclonal antibodies and enter kidney cells by passive diffusion., 4897-84-1.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary