Extending the Substrate Scope in the Hydrogenation of Unfunctionalized Tetrasubstituted Olefins with Ir-P Stereogenic Aminophosphine–Oxazoline Catalysts
作者:Maria Biosca、Ernest Salomó、Pol de la Cruz-Sánchez、Antoni Riera、Xavier Verdaguer、Oscar Pàmies、Montserrat Diéguez
DOI:10.1021/acs.orglett.8b04084
日期:2019.2.1
MaxPHOX-type ligands have been successfully applied in the challenging asymmetrichydrogenation of tetrasubstitutedolefins under mild reaction conditions. Gratifyingly, these catalyst precursors are able to efficiently hydrogenate not only a range of indene derivatives (ee’s up to 96%) but also 1,2-dihydronapthalene derivatives and acyclic olefins (ee’s up to 99%), which both constitute the most challenging
Copper-Catalyzed Unstrained C–C Single Bond Cleavage of Acyclic Oxime Acetates Using Air: An Internal Oxidant-Triggered Strategy toward Nitriles and Ketones
A copper-catalyzed aerobic oxidative C–C single bondcleavage of acyclic unstrained oxime acetates is reported, providing various aryl nitriles and ketones in good yields. Mechanistic studies indicate a radical procedure is involved in this transformation, and the oxygen atom in the ketone products is originated from O2 in the air. Oxime acetates as an internal oxidant have been proved to be an initiator
Indenylidene-3-acetic acid process for preparing indene acetic acids
申请人:Merck & Co., Inc.
公开号:US03944600A1
公开(公告)日:1976-03-16
Process for preparing 5-fluoro-2-methyl-1-(p-methylsulfinylbenzylidene)-indene-3-acetic acid by reacting fluorobenzene with an acid halide, to form an indanone, reaction of the indanone with a methylthio (or methylsulfinyl)benzyl compound to form 5-fluoro-2-methyl-1-(p-methylthiobenzyl) or (p-methylsulfinylbenzyl)-indene and reacting said indene with a glyoxylic acid. The invention also relates to intermediates thereof and processes for said intermediates.
Their design is based on hybrids between indanones to limit conformational mobility and other known HDAC inhibitors (SAHA, MS-275). The synthesis of these new derivatives was achieved by alkylation of appropriate indanones to introduce the side chain bearing a terminal ester group, the latter being a precursor of hydroxamic acid and aminobenzamide derivatives. These new analogues were found to be moderately
This invention relates to compounds of the formula
wherein R
1
to R
9
are as described below, or to pharmaceutically acceptable salts thereof. These compounds are BACE2 inhibitors and can be used as medicaments for the therapeutic and/or prophylactic treatment of diseases such as diabetes, particularly type 2 diabetes, and other metabolic disorders.