A Facile Synthesis of Carboxamides by Dehydration Condensation Between Free Carboxylic Acids and Amines Using O,O'-Di(2-pyridyl) Thiocarbonate as a Coupling Reagent
Carboxamides are prepared in high yields by dehydration condensation between nearly equimolar amounts of free carboxylic acids and amines both of which involve secondary or tertiary alkyl substituted ones with O,O'-di(2-pyridyl) thiocarbonate, a coupling reagent, in the presence of a catalytic amount of 4-(dimethylamino)pyridine.
Determination of absolute configuration of the derivative from 2-[4-(1-oxo-2-isoindolinyl)-phenyl]-propionic acid and R-(+)-1-phenylethylamine by 1H-NMR spectroscopy; use of shift reagent with diastereoisomeric amides
作者:Sergio De Munari、Giuseppe Marazzi、Angelo Forgione、Antonio Longo、Paolo Lombardi
DOI:10.1016/0040-4039(80)80022-0
日期:1980.1
The assignment of the S-(+), R-(−) absoluteconfiguration of Indoprofene, an analgesic and anti-inflammatory drug, has been made via an NMR configurational correlation of diastereoisomeric phenylethylamides with the aid of Eu(fod)3.
Anhydrides as acylating agents in lipase-catalyzed stereoselective esterification of racemic alcohols
作者:Daniele Bianchi、Pietro Cesti、Ezio Battistel
DOI:10.1021/jo00258a024
日期:1988.11
.alpha.-Amino acids as chiral educts for asymmetric products. Alkylation of N-phenylfluorenyl .alpha.-amino ketones. Synthesis of optically pure .alpha.-alkyl carboxylic acids