28315-93-7Relevant articles and documents
The evaluation of 1-tetralone and 4-chromanone derivatives as inhibitors of monoamine oxidase
Cloete, Stephanus J.,N’Da, Clarina I.,Legoabe, Lesetja J.,Petzer, Anél,Petzer, Jacobus P.
, p. 491 - 507 (2020/10/02)
Abstract: Monoamine oxidase (MAO) is of much clinical relevance, and inhibitors of this enzyme are used in the treatment for neuropsychiatric and neurodegenerative disorders such as depression and Parkinson’s disease. The present study synthesises and evaluates the MAO inhibition properties of a series of 33 1-tetralone and 4-chromanone derivatives in an attempt to discover high-potency compounds and to expand on the structure–activity relationships of MAO inhibition by these classes. Among these series, eight submicromolar MAO-A inhibitors and 28 submicromolar MAO-B inhibitors are reported, with all compounds acting as specific inhibitors of the MAO-B isoform. The most potent inhibitor was a 1-tetralone derivative (1h) with IC50 values of 0.036 and 0.0011?μM for MAO-A and MAO-B, respectively. Interestingly, with the reduction of 1-tetralones to the corresponding alcohols, a decrease in MAO inhibition potency is observed. Among these 1-tetralol derivatives, 1p (IC50 = 0.785?μM) and 1o (IC50 = 0.0075?μM) were identified as particularly potent inhibitors of MAO-A and MAO-B, respectively. Potent compounds such as those reported here may act as leads for the future development of MAO-B specific inhibitors. Graphic abstract: The present study describes the MAO inhibitory activities of a series of 1-tetralone and 4-chromanone derivatives. Numerous high-potency MAO-B specific inhibitors were identified.[Figure not available: see fulltext.].
Preparation method of levobunolol hydrochloride
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Paragraph 0041-0043-0044; 0048-0049; 0051-0052; 0054-0055, (2019/01/17)
The invention provides a preparation method of levobunolol hydrochloride. The preparation method comprises steps as follows: S-1-tert-butyl-epoxy methylamine and 1,2,3,4-tetrahydro-5-hydroxynaphthalen-1-one are subjected to a substitution reaction, and after acidizing treatment is performed, a target product, namely levobunolol hydrochloride, is prepared. With the adoption of the method, regioselectivity of the reaction is greatly improved, side reactions are avoided, yield of levobunolol hydrochloride is effectively increased, optical purity of levobunolol hydrochloride is effectively improved, yield reaches 87.3%, and ee value exceeds 99%.
Enantioselective halogenative semi-pinacol rearrangement: Extension of substrate scope and mechanistic investigations
Romanov-Michailidis, Fedor,Romanova-Michaelides, Maria,Pupier, Marion,Alexakis, Alexandre
supporting information, p. 5561 - 5583 (2015/03/30)
The present Full Paper article discloses a survey of our recent results obtained in the context of the enantioselective halogenation-initiated semi-pinacol rearrangement. Commencing with the fluorination/semi-pinacol reaction first and moving to the heavier halogens (bromine and iodine) second, the scope and limitations of the halogenative phase-transfer methodology will be discussed and compared. An extension of the fluorination/semi-pinacol reaction to the ring-expansion of five-membered allylic cyclopentanols will be also described, as well as some preliminary results on substrates prone to desymmetrization will be given. Finally, the present manuscript will culminate with a detailed mechanistic investigation of the canonical fluorination/semi-pinacol reaction. Our mechanistic discussion will be based on in situ reaction progress monitoring, complemented with substituent effect, kinetic isotopic effect and non-linear behaviour studies.
