18486-69-6Relevant articles and documents
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Suga,T. et al.
, p. 545 - 548 (1972)
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Hydroxylation by Cytochrome P-450 and Metalloporphyrin Models. Evidence for Allylic Rearrangement
Groves, John T.,Subramanian, Durga V.
, p. 2177 - 2181 (1984)
The allylic hydroxylation of 3,3,6,6-tetradeuteriocyclohexene, methylenecyclohexane, and β-pinene has been examined with phenobarbital-induced liver microsomal cytochrome P-450 (P-450LM2) and with iron porphyrin and chromium porphyrin model systems.Aerobic and peroxide dependent enzymic regimes were investigated with purified P-450LM2 and with microsomal suspensions.Epoxidation and allylic hydroxylation were primary reactions with all substrates.With 3,3,6,6-tetradeuteriocyclohexene, the major hydroxylation product (60-80percent) was the result of hydroxylation at the deuterated allylic site.In all cases, a significant amount (20-40percent) of hydroxylation occurred with allylic rearrangement.The iron porphyrin/iodosylbenzene model system also showed preferential hydroxylation of the deuterated allylic site (70percent) with significant allylic rearrangement (30percent).By contrast, the chromium porphyrin/iodosylbenzene model system showed complete scrambling of the allylic system.Extensive rearrangement accompanied the hydroxylation of methylenecyclohexane and β-pinene by both the enzymic and metalloporphyrin systems whereas the selenium dioxide oxidation of these substrates gave selective allylic hydroxylation without rearrangement.A mechanism is suggested for allylic hydroxylation by cytochrome P-450 and by the metalloporhyrin model systems involving initial hydrogen atom abstraction from the allylic site and geminate, cage recombination of the incipient, allylic free radical.
Monoterpene-containing substituted coumarins as inhibitors of respiratory syncytial virus (Rsv) replication
Borisevich, Sophia S.,Galochkina, Anastasia V.,Khomenko, Tatyana M.,Korchagina, Dina V.,Nikolaeva, Yulia V.,Petukhova, Galina D.,Salakhutdinov, Nariman F.,Shtro, Anna A.,Volcho, Konstantin P.
, (2021/12/24)
Respiratory syncytial virus (RSV) is a critical cause of infant mortality. However, there are no vaccines and adequate drugs for its treatment. We showed, for the first time, that O-linked coumarin–monoterpene conjugates are effective RSV inhibitors. The most potent compounds are active against both RSV serotypes, A and B. According to the results of the time-of-addition experiment, the conjugates act at the early stages of virus cycle. Based on molecular modelling data, RSV F protein may be considered as a possible target.
A Simple, Mild and General Oxidation of Alcohols to Aldehydes or Ketones by SO2F2/K2CO3 Using DMSO as Solvent and Oxidant
Zha, Gao-Feng,Fang, Wan-Yin,Leng, Jing,Qin, Hua-Li
supporting information, p. 2262 - 2267 (2019/04/17)
A practical, general and mild oxidation of primary and secondary alcohols to carbonyl compounds proceeds in yields of up to 99% using SO2F2 as electrophile in DMSO as both the oxidant and the solvent at ambient temperature. No moisture- and oxygen-free conditions are required. Stoichiometric amount of inexpensive K2CO3, which generates easy to separate by-products, is used as the base. Thus, 5-gram scale runs proceeded in nearly quantitative yields by a simple filtration as the work-up. The use of a polar solvent such as DMSO, which usually promotes competing Pummerer rearrangement, is also noteworthy. This protocol is compatible with a variety of common N-, O-, and S-functional groups on (hetero)arene, alkene and alkyne substrates (68 examples). The protocol was applied (99% yield) to a formal synthesis of the important cholesterol-lowering drug Rosuvastatin. (Figure presented.).
IBX as a catalyst for dehydration of hydroperoxides: Green entry to α,β-unsaturated ketones: Via oxygenative allylic transposition
Kuga, Tetsuya,Sasano, Yusuke,Iwabuchi, Yoshiharu
, p. 798 - 801 (2018/02/06)
A catalytic transformation of allylic hydroperoxides into α,β-unsaturated carbonyl compounds using IBX as a dehydration catalyst is described. The combination of a singlet oxygen ene reaction and the IBX-catalyzed dehydration provides α,β-unsaturated carbonyl compounds from alkenes via oxygenative allylic transposition with H2O as the only byproduct.
