CAS: 764-13-6; 2,5-Dimethyl-2,4-Hexadiene

上下游产品

2,5-dimethyl-2,5-hexanediol aniline hydrobromide 2,5-dimethyl-1,5-hexadiene 2-methyl-1-propenylbromide 2-isopropyl-4,6-dimethyl-cyclohex-3-enecarbaldehyde 2,2,5,5-tetramethyltetrahydrofuran t-ene2,5-dichloro-2,5-dimethyl-hex-3t-ene (E)-2,5-dimethylhex-3-ene

1-溴-2-甲基-1-丙烯置于potassium Iodide,Nickel Dichloride,锌体系中,用 六甲基磷酰三胺 作为反应溶剂,化学反应 9.0H,以74%的收率获得产物2,5-二甲基-2,4-己二烯
参考文献:原位反应生成的镍 (0) 催化的链烯基卤化物与锌粉的均偶联.立体化学的特定结果
标题:原位反应生成的镍 (0) 催化的链烯基卤化物与锌粉的均偶联.立体化学的特定结果
摘要:在烯基卤化物与锌粉的脱卤偶联中检测了从镍 (II) 盐原位反应生成的镍 (0) 的催化活性.烯基溴化物的反应发生,前提是存在碘化钾以帮助用锌粉还原镍 (II),并将烯基溴化物转化为相应的烯基碘化物.为了解释观测到的独特立体化学,提出了关于歧化步骤的推测性观点.
DOI:10.1246/bcsj.57.3517

专利信息

专利号:US-7723539-B2
优先权日:2004-06-16
标题:Catalysts based on metal complexes for the synthesis of optically active chrysanthemic acid
发明人：CARLONI SILVIA; BORZATTA VALERIO; MORONI LENI; TANZI GIADA; SARTORI GIOVANNI; MAGGI RAIMONDO
权利人:ENDURA SPA
摘要:Catalysts are described based on metal complexes derived from optically active s compounds, chosen from the classes consisting of bisoxazolines and salicylaldimines supported on an organic or inorganic matrix and employed in particular for the synthesis of optically active chrysanthemic acid.

专利号:US-11745159-B2
优先权日:2017-10-20
标题:Heated nanowells for polynucleotide synthesis
发明人：MARSH EUGENE P; INDERMUHLE PIERRE F; PECK BILL JAMES
权利人:TWIST BIOSCIENCE CORP
摘要:Defined sequence RNA synthesis by 3′→5′ direction is now well established and currently in use for synthesis and development of vast variety of therapeutic grade RNA and Si RNA etc. A number of such synthetic RNA requires a modification or labeling of 3′-end of an oligonucleotide. The synthesis of 3′-end modified RNA requiring lipophilic, long chain ligands or chromophores, using 3′→5′ synthesis methodology is challenging, requires corresponding solid support and generally results in low coupling efficiency and lower purity of the final oligonucleotide in general because of large amount of truncated sequences containing desired hydrophobic modification. We have approached this problem by developing reverse RNA monomer phosphoramidites for RNA synthesis in 5′→3′-direction. They lead to very clean oligonucleotide synthesis allowing for introduction of various modifications at the 3′-end.

专利号:US-7605218-B2
优先权日:2004-02-03
标题:Synthesis of elastomeric carborane-siloxanes by hydrosilation reactions
发明人：KELLER TEDDY M; KOLEL-VEETIL MANOJ K
权利人:US NAVY
摘要:A carborane-siloxane compound is provided having the repeat unit n nQ contains any of —SiR 2 —, —SiR 2 —O—, —C≡C—C≡C—, carboranyl, and U′. Each R and R′ is alkyl, aryl, alkylaryl, haloalkyl, haloaryl, or mixtures thereof. Each U′ is derivable from hydrosilation of an alkenyl or alkynyl group. Each T is alkyl, aryl, alkylaryl, haloalkyl, haloaryl mixtures thereof, —(O—SiR′ 2 ) x H, or the repeat unit. Each x and x′ is a positive integer. The compounds may be made be reacting a carborane-siloxane precursor having unsaturated end groups with a siloxane crosslinker in the presence of a hydrosilation catalyst.

专利号:US-7776976-B2
优先权日:2006-08-25
标 题 :Method for synthesis of butyl rubber
发明人：CHEN JIAN-FENG; GAO HUA; WU YI-XIAN; ZOU HAI-KUI; Chu guang-wen; ZHANG LEI
权利人:UNIV BEIJING CHEMICAL
摘要:This invention puts forward a process of preparing butyl rubber. High gravity devices are used as polymerization reactor. The mixture of isomonoolefin and conjugated diolefin monomers and the diluent, and the mixture of the initiator and diluent are pumped at a certain ratio into a high-gravity reactor to conduct cationic polymerization in the high-gravity environment. After polymerization, the monomers and the diluent are removed from the product to obtain butyl rubber polymers with number-average molecular weight of 80000Ëœ300000 and molecular weight distribution index of 1.9Ëœ3.6. The high gravity polymerization method of this invention can tremendously intensify micro-mixing, mass transfer and heat transfer in the reaction. Compared to the conventional stirred polymerization method, this invention features small reactor volume, at least 30-fold shorter residence time of substances in the high gravity reactor, low cost, low energy consumption and high production efficiency.

专利号:US-4197408-A
优先权日:1975-08-01
标 题 :Asymmetric synthesis of alkyl chrysanthemate
发明人：ARATANI TADATOSHI; FUJITA FUMIO; NAGASE TSUNEYUKI; YONEYOSHI YUKIO
权利人:SUMITOMO CHEMICAL CO
摘要:A process for the production of an optically active chrysanthemate which comprises reacting 2,5-dimethyl-2,4-hexadiene with a diazoacetate of the formula: n n N.sub.2 CHCOOR n n wherein R is selected from the group consisting of (a) cycloalkyl group with or without substituent(s) whose total carbon atom number is 5-20, (b) tertiary aralkyl group whose carbon atom number is 9 to 20, and (c) tertiary alkyl group with or without alkoxy substituent(s) whose total carbon atom number is 4-20, in the presence of a copper complex coordinated with a chiral Schiff base of the formula: ##STR1## wherein C* is an asymmetric carbon atom, R 1 is selected from the group consisting of (a) alkyl groups whose carbon atom number is 1-10 and (b) aralkyl groups with or without alkoxy substituent(s), whose total carbon atom number is 7-20, R 2 is selected from aryl groups with alkoxy substituent(s), whose total carbon atom number is 7-30, and each of X 1 and X 2 is selected from the group consisting of (a) hydrogen atom, (b) alkyl groups having 1-10 carbon atoms, (c) phenyl group, (d) alkoxy groups having 1-10 carbon atoms, (e) halogen atoms and (f) nitro group, or (g) X 1 and X 2 together form a benzo group.

专利号:US-4603218-A
优先权日:1983-06-03
标题 :Asymmetric synthesis of cyclopropanecarboxylate derivatives using chiral copper complex as catalyst
发明人：ARATANI TADATOSHI; YOSHIHARA HIROSHI; SUSUKAMO GOHFU
权利人:SUMITOMO CHEMICAL CO
摘要:A chiral copper complex which is produced by the reaction of a chiral copper complex of the formula: ##STR1## wherein R 1 is (a) alkyl group, or (b) aralkyl group; R 2 is (a) 2-alkoxyphenyl group, or (b) 2-alkoxy-5-alkylphenyl group; either one of X 1 and X 2 is (a) hydrogen atom, (b) halogen atom, (c) alkyl group, (d) alkoxy group, or (e) nitro group, or adjacent X 1 and X 2 together form a benzo group, with a mono-substituted hydrazine of the formula: n n R.sub.3 NHNH.sub.2 n n wherein R 3 is (a) aryl group, (b) aralkyl group, or (c) alkyl group. n The copper complex is used as a catalyst in the production of an optically active alkyl cyclopropanecarboxylate.