Design, synthesis and biological evaluation of spiropyrimidinetriones oxazolidinone derivatives as antibacterial agents
作者:Asher M. Siddiqui、Jitendra A. Sattigeri、Kalim Javed、Syed Shafi、M. Shamim、Smita Singhal、Zubbair M. Malik
DOI:10.1016/j.bmcl.2018.02.055
日期:2018.4
positive bacteria. We report herein a novel class of spiropyrimidinetrione oxazolidinone derivatives as novel antibacterialagents. Key step towards the synthesis of title compounds involved the use of tert-amino reaction with [1,5]-hydride shift leading to the new CC bond formation. Compound 30n has demonstrated potent antibacterial activity against a panel of Gram-positive microbial strains including
Palladium catalysed [4+2]-cycloaddition reactions of (2-Iodoaryl)allenes
作者:Ronald Grigg、Long-He Xu
DOI:10.1016/0040-4039(96)00809-x
日期:1996.6
(2-Iodoaryl)allenes are versatile 4C-components in palladium catalysed [4+2] cycloaddition reactions with norbornene, 2-aza-3-oxonorbom-5-ene, and allene acting as 2C-components. A variety of dihydronaphthalenes and naphthalenes are produced in excellent yield. Copyright (C) 1996 Elsevier Science Ltd
[EN] 6-BRIDGED HETEROARYLDIHYDROPYRIMIDINES FOR THE TREATMENT AND PROPHYLAXIS OF HEPATITIS B VIRUS INFECTION<br/>[FR] HÉTEROARYLDIHYDROPYRIMIDINES PONTÉES EN POSITION 6 POUR LE TRAITEMENT ET LA PROPHYLAXIE D'UNE INFECTION PAR LE VIRUS DE L'HÉPATITE B
申请人:HOFFMANN LA ROCHE
公开号:WO2014184328A1
公开(公告)日:2014-11-20
The invention provides novel compounds having the general formula: wherein R1, R2, R3 and R4 are as defined in the description and in the claims, as well as or pharmaceutically acceptable salts, or tautomerism isomers, or enantiomers, or diastereomers thereof. The invention also contains compositions including the compounds and methods of using the compounds for the treatment or prophylaxis of hepatitis B virus infection.
CO or CN bonds in one pot with excellent regio- and stereoselectivity. Carboxylic acids, amides, and hydroxide are all suitable nucleophiles. Organoboronic acid acts as hydroxide transfer reagent. An intermediate π-allyl palladium complex was isolated, which yields improved catalytic performance as well as evidence of the origin of stereoselectivity. A derivatization study emphasizes the utility of the