CAS: 142-29-0; Cyclopentene

上下游产品

CAS号542-92-7 环戊二烯 | CAS号77-73-6 二聚环戊二烯 | CAS号79885-00-0 tetrahydroindene | CAS号287-92-3 环戊烷 | CAS号5057-98-7 顺式-1,2-环戊二醇 | CAS号285-67-6 氧化环戊烯 | CAS号930-28-9 氯代环戊烷 | CAS号7789-20-0 重水 | CAS号96-41-3 环戊醇 | CAS号137-43-9 溴代环戊烷 | CAS号3875-51-2 异丙基环戊烷 | CAS号2207-01-4 顺-1,2-二甲基环己胺 | CAS号6876-23-9 反-1,2-二甲基环己烷 | CAS号3400-45-1 环戊甲酸 | CAS号1560-11-8 1-环戊烯羧酸 | CAS号52829-98-8 2-环戊烷乙醇 | CAS号13668-59-2 2-Cyclopentenem... | CAS号79828-30-1 trans-1-Hydroxy... | CAS号488-86-8 克酮酸

环戊二烯置于钯 氢气体系中,用 甲醇 用作溶剂,30.0 °C,101.32 Kpa 条件下,以97.1%的收率获得环戊烯
参考文献:螯合树脂负载胶体钯将环戊二烯选择性加氢制备环戊烯
标题:螯合树脂负载胶体钯将环戊二烯选择性加氢制备环戊烯
摘要:使用负载在螯合树脂上的胶体钯和亚氨基二乙酸部分作为催化剂,将环戊二烯选择性地氢化成环戊烯.该催化剂含有直径为 1-6 Nm 的金属颗粒,通过用甲醇还原钯 (II)-螯合树脂络合物制备.在 30oc 和 1 个大气压的氢气下,环戊二烯的转化率为 97.1%,环戊二烯的转化率为 100%.该产率值也是通过重复使用催化剂而实现的.氢化速率与反应中所用溶剂的极性参数 Et(30) 值相关,但二甲基亚砜除外.环戊二烯 (Rd) 和环戊烯 (Re) 的加氢速率分别表示为 Rd=kd[h2][催化剂] 和 Re=ke[h2][环戊烯][催化剂],其中 Kd 和 Ke 是速率常数.
Doi:10.1246/bcsj.57.488

专利信息

专利号:US-12421534-B2
优先权日:2021-11-10
标 题 :Engineered enzymes and method for the synthesis of diverse tyrosine analogs
发明人：ALMHJELL PATRICK J; ARNOLD FRANCES H
权利人:CALIFORNIA INST OF TECHN
摘要:Provided herein is an engineered tryptophan synthase β-subunit (TrpB) that catalyzes the synthesis of tyrosine, tyrosine analogs, or salts thereof. Also provided herein are methods for preparing tyrosine, tyrosine analogs, or a salt thereof using the engineered TrpB described herein.

专利号:US-7192567-B1
优先权日:1999-09-17
标题 :Precursor soot synthesis of fullerenes and nanotubes without formation of carbonaceous soot
发明人：REILLY PETER T A
权利人:UT BATTELLE LLC
摘要:The present invention is a method for the synthesis of fullerenes and/or nanotubes from precursor soot without the formation of carbonaceous soot. The method comprises the pyrolysis of a hydrocarbon fuel source by heating the fuel source at a sufficient temperature to transform the fuel source to a condensed hydrocarbon. The condensed hydrocarbon is a reaction medium comprising precursor soot wherein hydrogen exchange occurs within the reaction medium to form reactive radicals which cause continuous rearrangement of the carbon skeletal structure of the condensed hydrocarbon. Then, inducing dehydrogenation of the precursor soot to form fullerenes and/or nanotubes free from the formation of carbonaceous soot by continued heating at the sufficient temperature and by regulating the carbon to hydrogen ratio within the reaction medium. The dehydrogenation process produces hydrogen gas as a by-product. The method of the present invention in another embodiment is also a continuous synthesis process having a continuous supply of the fuel source. The method of the present invention can also be a continuous cyclic synthesis process wherein the reaction medium is fed back into the system as a fuel source after extraction of the fullerenes and/or nanotube products. The method of the present invention is also a method for producing precursor soot in bulk quantity, then forming fullerenes and/or nanotubes from the precursor bulk.

专利号:US-2024051918-A1
优先权日:2022-08-10
标 题 :Sequential and independent synthesis of mercaptans and asymmetrical sulfides in a single reactor
发明人：LASSEN KENNETH M; NWAGWU UGOCHUKWU; HASENBERG DANIEL M
权利人:CHEVRON PHILLIPS CHEMICAL CO LP
摘要:The present disclosure generally relates to processes to produce a mercaptan and an asymmetrical sulfide utilize stacked bed catalyst systems containing CoMo and NiMo, and these processes demonstrate a synergistic reduction in the amount of ethylene, methyl mercaptan, ethyl mercaptan, and H2S in product mixtures. In aspects, the conversion of limiting reactants in the synthesis of asymmetrical sulfides unexpectedly remain high under increased flow rates through the catalyst bed, and under reduced temperatures and pressures. In further aspects, reactor systems configured for the independent synthesis of mercaptans and asymmetrical sulfides in a single fixed bed catalyst vessel are also disclosed as a simplification of existing reactor systems employing separate reactors for separate mercaptan and sulfide syntheses.

专利号:WO-2021035382-A1
优先权日:2019-08-23
标题:Method forcontinuous synthesis of 2-cyclopentene-1-one
发明人：HONG HAO; LU JIANGPING; BAO DENGHUI; YUAN LONG; WANG BO
权利人:LIAONING ASYMCHEM LABORATORIES CO LTD
摘要:Provided is a method for the continuous synthesis of 2-cyclopenten-1-one. The continuous synthesis method comprises: loading a catalyst in a continuous reaction device, then continuously conveying cyclopentene, an oxidant and a solvent into the continuous reaction device for an oxidation reaction, and continuously discharging 2-cyclopentene-1-one. In the presence of the catalyst and the solvent, cyclopentene is used as a starting material, and same is directly oxidized by the oxidant, which can avoid the generation of a large amount of halogen-containing three wastes; at the same time, the entire continuous synthesis process is carried out in the continuous reaction device, which can effectively inhibit the occurrence of safety risks during scale-up production; in addition, after the reaction is complete, the product system of the oxidation reaction can be simply concentrated to obtain the target product (2-cyclopenten-1-one). Thus, the purity (up to 98% and above) and separation rate (up to 79%) of the product are greatly improved, and production can be easily scaled up.

专利号:US-2024228455-A1
优先权日:2021-04-27
标 题 :Synthesis of cbn and cbnv
发明人：KAVARANA MALCOLM J
权利人:TEEWINOT LIFE SCIENCES CORP
摘要:The invention includes chemical synthesis for preparing cannabinol (CBN) and cannabinovarin (CBNV). The process is suitable for inter alia the large-scale synthesis of pharmaceutical grade CBN and CBNV.

专利号:US-4384127-A
优先权日:1981-04-08
标 题:Process for synthesis of optically pure prostaglandin E2 and analogs thereof
发明人：FUCHS PHILLIP L
权利人:PURDUE RESEARCH FOUNDATION
摘要:The invention comprises a multi-step synthesis of l(-) prostaglandin E 2 . The special features of the synthesis include: (1) a triply-convergent conjugate-addition and alkylation reaction involving the 1,4-addition of a chiral vinyl lithium reagent to a chiral vinylsulfone to produce a sulfone-stabilized anion. This anion is alkylated in situ to produce the basic prostaglandin skeleton structure, which is then subjected to (2) an efficient peracid oxidation of a secondary amine to a β-silyloxy oxime; and (3) an alkali-catalyzed 1,4-elimination of an α-sulfonyl oxime to produce a vinyl nitroso intermediate. This intermediate is treated with borohydride to give a stereospecific 1,4-reduction which yields the bis-silyloxy oxime of l(-)PGE 2 . Hydrolysis of the oxime, with concurrent cleavage of the silyloxy protecting groups, affords l(-)PGE 2 .