50827-57-1Relevant articles and documents
ONO-pincer ruthenium complex-bound norvaline for efficient catalytic oxidation of methoxybenzenes with hydrogen peroxide
Yoshida, Ryota,Isozaki, Katsuhiro,Yokoi, Tomoya,Yasuda, Nobuhiro,Sadakane, Koichiro,Iwamoto, Takahiro,Takaya, Hikaru,Nakamura, Masaharu
supporting information, p. 7468 - 7479 (2016/08/16)
The enhanced catalytic activity of ruthenium complex-bound norvaline Boc-l-[Ru]Nva-OMe 1, in which the ONO-pincer ruthenium complex Ru(pydc)(terpy) 2 is tethered to the α-side chain of norvaline, has been demonstrated for the oxidation of methoxybenzenes to p-benzoquinones with a wide scope of substrates and unique chemoselectivity.
ON THE REGIOSELECTIVITY OF THE FREMY'S SALT OXIDATION OF PHENOLS
Deya, Pedro M.,Dopico, Mercedes,Raso, Angel Garcia,Morey, Jeronimo,Saa, Jose M.
, p. 3523 - 3532 (2007/10/02)
A detailed study of the regioselectivity of the Fremy's salt oxidation of phenols, including a series of MNDO calculations of the intermediate phenoxy radicals, has been carried out.The analysis of these results has led us to establish a new rule for the para vs. ortho regioselectivity, namely: "C-4 unsubstituted phenols, as well as phenols substituted at C-4 with easy-to-displace groups, undergo oxidation (or oxidative degradation) by the action of Fremy's salt, thus eventually providing the corresponding p-quinones".A similar rule for the ortho vs. ortho' regioselectivity could not be so precisely formulated since now steric effects play a significant major role.
Quassinoids. An Approach to the BCDE Rings of Bruceantin
Stevens, Robert V.,Vinogradoff, Anna P.
, p. 4056 - 4062 (2007/10/02)
Synthesis of a model 28 for the BCDE rings of bruceantin via a BC -> BCE -> BCED ring strategy is presented.The sequence includes Diels-Alder reaction of methyl 3,5-hexadienoate 9 and quinone 8 derived from o-vanillyl alcohol, selenocyclization of hydroxy diester 22, and lactone formation to give the BCDE system 25.Manipulation on 25 showed the viability of its functional groups for further development in the synthetic strategy.