176100-46-2Relevant academic research and scientific papers
Kinetic Resolution of Allylic Alcohol with Chiral BINOL-Based Alkoxides: A Combination of Experimental and Theoretical Studies
Liu, Yidong,Liu, Song,Li, Dongmei,Zhang, Nan,Peng, Lei,Ao, Jun,Song, Choong Eui,Lan, Yu,Yan, Hailong
supporting information, p. 1150 - 1159 (2019/01/11)
The development and characterization of enantioselective catalytic kinetic resolution of allylic alcohols through asymmetric isomerization with chiral BINOL derivatives-based alkoxides as bifunctional Br?nsted base catalysts were described in the study. A number of chiral BINOL derivatives-based alkoxides were synthesized, and their structure-enantioselectivity correlation study in asymmetric isomerization identified a promising chiral Br?nsted base catalyst, which afforded various chiral secondary allylic alcohols (ee up to 99%, S factor up to >200). In the mechanistic study, alkoxide species were identified as active species and the phenol group of BINOL largely affected the high reactivity and enantioselectivity via hydrogen bonding between the chiral Br?nsted base catalyst and substrates. The strategy is the first successful synthesis strategy of various chiral secondary allylic alcohols through enantioselective transition-metal-free base-catalyzed isomerization. The applicability of the strategy had been demonstrated by the synthesis of the bioactive natural product (+)-veraguensin.
Detrifluoroacetylation Reaction of Trifluoromethyl-β-diketones: Facile Method for the Synthesis of Succinimide Derivatives and 1,4-Diketones
Wang, Li-Hua,Zhao, Jing
supporting information, p. 4345 - 4348 (2018/08/31)
Currently, a great deal of research efforts are focused on C–C bond activation for development of novel synthetic methodology. In this paper, a detrifluoroacetylation of trifluoromethyl-β-diketones is described, which allows for the synthesis of succinimides and 1,4-diketones through cascade Michael addition/retro-Claisen reaction and nucleophilic substitution/retro-Claisen reaction. The readily available trifluoromethyl-β-diketones, wide substrate scope, and mild conditions make this method very practical.
Acylguanidine inhibitors of β-secretase: Optimization of the pyrrole ring substituents extending into the S1 and S3 substrate binding pockets
Cole, Derek C.,Stock, Joseph R.,Chopra, Rajiv,Cowling, Rebecca,Ellingboe, John W.,Fan, Kristi Y.,Harrison, Boyd L.,Hu, Yun,Jacobsen, Steve,Jennings, Lee D.,Jin, Guixian,Lohse, Peter A.,Malamas, Michael S.,Manas, Eric S.,Moore, William J.,O'Donnell, Mary-Margaret,Olland, Andrea M.,Robichaud, Albert J.,Svenson, Kristine,Wu, JunJun,Wagner, Eric,Bard, Jonathan
, p. 1063 - 1066 (2008/09/19)
Proteolytic cleavage of amyloid precursor protein by β-secretase (BACE-1) and γ-secretase leads to formation of β-amyloid (Aβ) a key component of amyloid plaques, which are considered the hallmark of Alzheimer's disease. Small molecule inhibitors of BACE-1 may reduce levels of Aβ and thus have therapeutic potential for treating Alzheimer's disease. We recently reported the identification of a novel small molecule BACE-1 inhibitor N-[2-(2,5-diphenyl-pyrrol-1-yl)-acetyl]guanidine (3.a.1). We report here the initial hit-to-lead optimization of this hit and the SAR around the aryl groups occupying the S1 and S2′ pockets leading to submicromolar BACE-1 inhibitors.
Synthesis of 1,4-Diketones by Condensation of Methyl Ketones with Aromatic α-Bromo Ketones in the Presence of Tetraisopropoxytitanium
Kulinkovich, O. G.,Kel'in, A. V.,Senin, P. V.
, p. 1060 - 1062 (2007/10/03)
Condensation of methyl ketones with bromomethyl aryl ketones in the presence of an equimolar amount of tetraisopropoxytitanium allows one-step synthesis of corresponding 1,4-diketones.The reaction presumably proceeds via intermediate formation of activate
