930-66-5Relevant academic research and scientific papers
Cyclohexeno[3,4]cyclodec-1,5-diyne-3-ene: A Convenient Enediyne
Perrin, Charles L.,Shrinidhi, Annadka
supporting information, p. 6911 - 6915 (2021/09/14)
Enediynes are widely studied to understand their cycloaromatization and the trapping of the resulting p-dehydrobenzene diradical. However, few model substrates are known, and they are hard to synthesize and difficult to handle. Herein we report cyclohexen
Preparation method of heteroatom-containing cyclohexene halide
-
Paragraph 0048-0050, (2019/12/25)
The invention discloses a preparation method of a heteroatom-containing cyclohexene halide, belonging to the field of synthesis of fine chemical intermediates. According to the preparation method, cyclohexanone containing heteroatoms is used as a raw material, and gem-dihalide or alkenyl halide is mainly generated in a halogenating reagent; and after an additive is added into organic alkali, and hydrogen halide is removed to generate cyclohexene halide containing heteroatoms. The method is simple in process; the operation of purifying a mixture in traditional methods is avoided; and a productis fully utilized. Under close-to-elimination condition of gem-dibromide, an additive is added to overcome the problem of difficulties in gem-dichloride elimination is by adding, and the purpose of controlling regioselectivity is achieved through steric hindrance of different alkalis.
Synthesis of Vinyl Chlorides via Triphosgene-Pyridine Activation of Ketones
Saputra, Mirza A.,Ngo, Ly,Kartika, Rendy
, p. 8815 - 8820 (2015/09/15)
Herein, we describe a mild method to prepare aliphatic and aromatic vinyl chlorides from their corresponding ketones via triphosgene-pyridine activation in dichloromethane at reflux. The mechanism of this reaction is proposed to involve formation of a put
The continuous reaction device and method of using the continuous composite (by machine translation)
-
Paragraph 0179, (2017/01/02)
PROBLEM TO BE SOLVED: compounds with high productivity can be generated. SOLUTION: 1 the raw material supply section 12 and a first, a second and 2 the raw material supply section 14, and a reaction part 18, the first reaction part 1 from the raw material supply section 1 and a second quantity of raw material, the raw material supply section 2 from the first reaction part 2 and a second quantity of raw material, the raw material supply section 1 from the first reaction part 1 and a second temperature of the raw material, the raw material supply section 2 from the first reaction part 2 and supplied to the temperature of the raw material, and having a control part 22, a continuous reaction device as shown in the drawing. Selected drawing: fig. 1 (by machine translation)
Structure and Dynamic Features of an Intramolecular Frustrated Lewis Pair
Axenov, Kirill V.,Moemming, Cornelia M.,Kehr, Gerald,Froehlich, Roland,Erker, Gerhard
supporting information; experimental part, p. 14069 - 14073 (2011/02/23)
Di(mesityl)cyclohexenylphosphine undergoes hydroboration with Piers' borane [HB(C6F5)2] to yield the cyclohexylene- anellated frustrated Lewis pair 5. This P/B pair splits H2 with the formation of the product 4
First catalytic and green synthesis of aryl-(Z)-vinyl chlorides and its plausible addition-elimination mechanism
Su, Weike,Jin, Can
, p. 993 - 996 (2007/10/03)
(Chemical Equation Presented) Via a catalytic cycle in the presence of scandium triflate (2 mol %)/DMF (1 mol %)/benzoyl chloride (5 mol %), aromatic ketones were treated with bis(trichloromethyl) carbonate (BTC) to afford aryl-(Z)-vinyl chlorides. All metal triflates tested in the reaction showed highly catalytic activity. A plausible addition-elimination mechanism was proposed. The present work describes the first catalytic and green route to the synthesis of aryl-(Z)-vinyl chlorides.
Method for chlorinating ketones
-
Example 1, (2008/06/13)
In a process for chlorinating ketones which, apart from the carbonyl group, are inert in respect of triarylphosphine dichlorides, except for cyclopropyl methyl ketone, in which the ketones are reacted with a chlorinating agent in the presence of triarylphosphine oxides, the amount of triarylphosphine oxide is from 0.1 to 10 mol %, based on the amount of ketone. The ketones preferably have a least one CH-acid proton in the α position to the carbonyl group.
Dichotomous reactivity of PCl5 and PBr5 toward cyclic ketones: A one-step preparation of 1,1,2-trichlorocycloalkanes
Brown,Chronister,Watkins,Mazzaccaro,Rajski,Fountain,McKay,Gibson
, p. 485 - 501 (2007/10/02)
Small-ring cyclic ketones react with excess PCl5 in CCl4 (reflux, 1-3 d) to give the corresponding 1,1,2-trichlorocycloalkanes, but react with PBr5 to give ketones brominated in the α-positions.
One-pot synthesis of α-trimethylsilyl enones from vinylsilanes
Adam,Richter
, p. 176 - 180 (2007/10/02)
Photooxygenation of vinylsilanes in the presence of acetic anhydride and pyridine afforded α-trimethylsilyl enones 1 in moderate to good yields. Since the required starting materials are readily available, the present approach constitutes a useful alterna
Ring-fused and spiro cyclopentenones by Ni(CO)4-promoted intermolecular carbonylative cycloaddition of acetylenes with 3-halo- and 1-(halomethyl)cycloalkenes
Pagès, Lluís,Llebaria, Amadeu,Camps, Francisco,Molins, Elies,Miravitlles, Caries,Moretó, Josep M.
, p. 10449 - 10461 (2007/10/02)
The title carbonylative cycloaddition of five- to eight-member ring 3-halo- and 1-(halomethyl)cycloalkenes with different acetylenes was studied. From moderate to good yields of ring-fused and spiro cyclopentenone derivatives were obtained, especially in the reaction with acetylenes bearing electron-withdrawing substituents by proper selection of the reaction conditions to avoid the acetylene polyinsertion and/or other side reactions from the organonickel intermediates. In this context, the beneficial role of acetate ion on the outcome of the reaction is rationalized. This process leading to the formation of bicycloadducts with the concomitant formation of up to six C-C bonds, with high regio- and stereoselectivity, can be useful in the synthesis of natural products as exemplified by the easy preparation of [5-5-5] tricyclic compound 14 from a 1:1 cis and trans isomeric mixture of 6-acetoxy-3-bromocyclooctene (11). A plausible general reaction mechanism is proposed that is consistent with all the products obtained.
