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3-Bromobenzaldehyde
3-Bromobenzaldehyde is an isomer of bromobenzaldehyde. It is a colorless viscous liquid. Synthesis 3-Bromobenzaldehyde can be prepared from 3-nitrobenzaldehyde. To 1,2-dichloroethane (1,2-dichloroethane: 143.8 g, 1-bromo-2-chloroethane: 60.5 g, 1,2-dibromoethane: 4.8 g) recovered from Example 2 was added fresh 1,2-dichloroethane (41.5 g), and 98% aluminum chloride (0.65 mol, 88.6 g) was mixed. Into this was blown chlorine (0.25 mol, 17.8 g) at °C., and 97% benzaldehyde (0.50 mol, 54.6 g) was added over 1 hour at 40 °C. After bromine (0.30 mol, 48.0 g) was added dropwise to this mixture over 2 hours at 40 °C., the resulting mixtures were stirred for 2 hours at that temperature. The post-treatment was carried out by the similar procedure to that in Example 1. As a result, 83.1 g of 3-bromobenzaldehyde were obtained. Patents: Application SNDRI Application patentPC9839278:Bruce F Molino, Marlene Cohen, Barry Berkowitz, WO2006058016 (Amr Technology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bromobenzaldehyde
Bromobenzaldehydes are any of three organic compounds with the formula BrC6H4COH, consisting of a formyl group and a bromine atom attached to a central benzene ring. They can be considered as aryl bromide, brominated derivatives of benzaldehyde, or as aldehyde, formylated derivatives of bromobenzene. References {{reflist Bromobenzene derivatives Benzaldehydes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4-Bromobenzaldehyde
4-Bromobenzaldehyde, or ''p''-bromobenzaldehyde, is an organobromine compound with the formula . It is one of three isomers of bromobenzaldehyde. It displays reactivity characteristic of benzaldehyde and an aryl bromide. Preparation 4-Bromobenzaldehyde may be prepared in the laboratory in two steps by oxidation 4-bromotoluene. In the first step, two bromine atoms are added to the methyl group of 4-bromotoluene by free radical bromination to form 4-bromobenzal bromide. In the second step, the dibrominated methyl group is hydrolyzed with calcium carbonate, then steam distilled to collect 4-bromobenzaldehyde. Reactions Owing to the bromoaryl group, 4-bromobenzaldehyde participates in various cross coupling reactions, such as Suzuki coupling. In a Sonogashira coupling it couples with trimethylsilylacetylene Trimethylsilylacetylene is the organosilicon compound with the formula . A colorless liquid, "tms acetylene", as it is also called, is used as a source of anion in organ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigma-Aldrich
Sigma-Aldrich (formally MilliporeSigma) is an American chemical, life science, and biotechnology company owned by the multinational chemical conglomerate Merck Group. Sigma-Aldrich was created in 1975 by the merger of Sigma Chemical Company and Aldrich Chemical Company. It grew through various acquisitions until it had over 9,600 employees and was listed on the Fortune 1000. The company has two United States headquarters, in St. Louis and Burlington, MA and has operations in approximately 40 countries. In 2015, the multinational chemical conglomerate Merck Group acquired Sigma-Aldrich for $17 billion. The company is currently a part of Merck's life science business and in combination with Merck's earlier acquired Millipore Corporation, Millipore, operates as MilliporeSigma. It is headquartered in Burlington, Massachusetts, United States. History Sigma Chemical Company of St. Louis and Aldrich Chemical Company of Milwaukee were both American specialty chemical companies when they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
