Diastereoselective Electrophilic Trifluoromethylthiolation of Chiral Oxazolidinones: Access to Enantiopure α-SCF<sub>3</sub>
Alcohols
作者:Hélène Chachignon、Evgeniy V. Kondrashov、Dominique Cahard
DOI:10.1002/adsc.201701474
日期:2018.3.1
Lithium imideenolates featuring Evans’ chiral oxazolidinone auxiliary were involved in diastereoselective α‐trifluoromethylthiolation with electrophilic SCF3 donors. Diastereopure products were isolated and converted to enantiopure α‐SCF3 alcohols without racemisation.
Synthesis and Evaluation of Some Gastrointestinal Sparing Anti-Inflammatory Aminoethyl Ester Derivatives of Naphthalene-Based NSAIDs
作者:Parmeshwari K. Halen、Manisha K. Raval、Kewal K. Chagti、Rajani Giridhar、Mange R. Yadav
DOI:10.1002/ardp.200600159
日期:2007.2
NSAIDs bearing structural resemblance to the aminoalcohol ester class of anticholinergics were specially designed and synthesized. Besides blocking the acidic carboxyl group to overcome the local gastric irritation, the anticholinergicactivity was incorporated with the expected advantage of reducing the gastric toxicity by decreasing gastric acid secretions and motility. Derivatives of naproxen and
Aminoalkylnaphthols and esters thereof, useful as cardiotonic agents, prepared from the corresponding RO-naphthalenealkylamines, certain of which are also useful as cardiotonic agents, are disclosed.
Aminoalkylnaphthols and esters thereof, useful as cardiotonic or antibacterial agents, are prepared from the corresponding RO-naphthalenealkylamines, certain of which are also useful as cardiotonic agents.
A palladium-catalyzed intramolecular decarboxylative cyclization of α-aryl-γ-methylidene-δ-valerolactones, followed by olefin isomerization, has been developed to give fused polycyclic aromatic compounds under mild conditions. The process described here can be regarded as a formal decarboxylative allylic arylation without using a pre-formed organometallic nucleophile. The reaction can be conducted on a gram scale and the products thus obtained are further derivatized with ease.