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57428-67-8

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57428-67-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57428-67-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,4,2 and 8 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 57428-67:
(7*5)+(6*7)+(5*4)+(4*2)+(3*8)+(2*6)+(1*7)=148
148 % 10 = 8
So 57428-67-8 is a valid CAS Registry Number.

57428-67-8Relevant academic research and scientific papers

POLYCYCLIC CARBOGENIC MOLECULES AND USES THEREOF AS ANTI-CANCER AGENTS

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Paragraph 0225; 0270; 0271, (2019/05/15)

Disclosed are new polycyclic carbogenic molecules and their methods of synthesis. The new polycyclic carbogenic molecules may be utilized in anti-cancer therapies. In particular, the polycyclic carbogenic molecules may be formulated as pharmaceutical comp

A strategy for the convergent and stereoselective assembly of polycyclic molecules

Robinson, Emily E.,Thomson, Regan J.

supporting information, p. 1956 - 1965 (2018/02/17)

The stereoselective oxidative coupling of cyclic ketones via silyl bis-enol ethers followed by ring-closing metathesis is shown to be a general and powerful reaction sequence for the preparation of diverse polycyclic scaffolds from simple precursors. The

Hydrolytic enantioselective protonation of cyclic dienyl esters and a β-diketone with chiral phase-transfer catalysts

Yamamoto, Eiji,Gokuden, Daichi,Nagai, Ayano,Kamachi, Takashi,Yoshizawa, Kazunari,Hamasaki, Akiyuki,Ishida, Tamao,Tokunaga, Makoto

supporting information, p. 6178 - 6181 (2013/02/25)

Hydrolytic enantioselective protonation of dienyl esters and a β-diketone catalyzed by phase-transfer catalysts are described. The latter reaction is the first example of an enantio-convergent retro-Claisen condensation. Corresponding various optically active α,β-unsaturated ketones having tertiary chiral centers adjacent to carbonyl groups were obtained in good to excellent yields and enantiomeric ratios (83-99%, up to 97.5:2.5 er).

Organocatalytic dynamic kinetic resolution via conjugate addition: Synthesis of chiral trans-2,5-dialkylcyclohexanones

Pandey, Ganesh,Adate, Priyanka A.,Puranik, Vedavati G.

supporting information, p. 8260 - 8267,8 (2020/09/09)

A novel strategy of initiating an organocatalysed dynamic kinetic resolution (dr up to 99:1 and er up to 94:6) for the synthesis of chiral trans-2,5-dialkylcyclohexanones by an asymmetric conjugate addition of dimethyl malonate on to 6-substituted cyclohexenones is reported.

Mn(III)-based oxidative free-radical cyclizations of unsaturated ketones

McCarthy Cole, Bridget,Han, Luning,Snider, Barry B.

, p. 7832 - 7847 (2007/10/03)

Mn(III)-based oxidative free-radical cyclization of unsaturated ketones is a versatile synthetic procedure with broad applicability. For example, oxidation of cyclopentanone 1a with 2 equiv of Mn(OAc)3·2H2O and 1 equiv of Cu(OAc)sub

Intramolecular Cross-ring Enone-Alkene Photoannelation in 6-(ω-Alkenyl)-cyclohex-2-en-1-ones

Lakshmi, A. B.,Rao, Jampani Madhusudana

, p. 476 - 477 (2007/10/02)

The irradiation of some 6-(ω-alkenyl)-cyclohex-2-en-1-ones in micelles gave a carbonyl bridged intramolecular photoadduct but the reaction is restricted to enones tethered to an alkene by not more than a four-carbon chain.

A Novel Synthesis of Bicyclic Isoxazolines via Sequential Michael and Intramolecular 1,3-Dipolar Additions

Uno, Hidemitsu,Watanabe, Noriko,Fujiki, Satomi,Suzuki, Hitomi

, p. 471 - 474 (2007/10/02)

Bicyclic isoxazolines are obtained in good yields by the titanium tetrachloride-mediated reaction of allylic stannanes with 1-nitroalkadienes.Titanium tetrachloride converts stannyl nitronates generated in the Michael addition step to nitrile oxide equiva

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