The present invention relates to new thiazolyl-dihydro-indazoles of general formula (I)
wherein the groups R
1
, R
2
and R
3
have the meanings given in the claims and specification, the tautomers, racemates, enantiomers, diastereomers and the mixtures thereof, and optionally the pharmacologically acceptable acid addition salts, solvates and hydrates thereof, and processes for preparing these thiazolyl-dihydro-indazoles and the use thereof as pharmaceutical compositions.
Modular synthesis of 1,4-diketones through regioselective bis-acylation of olefins by merging NHC and photoredox catalysis
作者:Jun-Long Li、Si-Lin Yang、Qing-Song Dai、Hua Huang、Lu Jiang、Qing-Zhu Li、Qi-Wei Wang、Xiang Zhang、Bo Han
DOI:10.1016/j.cclet.2023.108271
日期:2023.3
Efficient and modular synthesis of structurally diverse 1,4-diketones from readily available building blocks represents an essential but challenging task in organic chemistry. Herein, we report a multi-component, regioselective bis-acylation of olefins by merging NHC organocatalysis and photoredox catalysis. With this protocol, a broad range of 1,4-diketones could be rapidly assembled using bench-stable
Synthesis of Filibuvir. Part I. Diastereoselective Preparation of a β-Hydroxy Alkynyl Oxazolidinone and Conversion to a 6,6-Disubstituted 2<i>H</i>-Pyranone
作者:Robert A. Singer、John A. Ragan、Paul Bowles、Esmort Chisowa、Brian G. Conway、Eric M. Cordi、Kyle R. Leeman、Leo J. Letendre、Janice E. Sieser、Gregory W. Sluggett、Corey L. Stanchina、Holly Strohmeyer、Jon Blunt、Stuart Taylor、Ciaran Byrne、Denis Lynch、Sandra Mullane、Maria M. O’Sullivan、Marcella Whelan
DOI:10.1021/op4002356
日期:2014.1.17
This is the first in a series of three papers describing the identification and development of a commercial synthesis of filibuvir (1). This contribution describes development of an Evans aldol reaction to control the tertiary alcohol stereocenter, a challenging variant of that strategy in that both reacting partners were nonstandard (acetate etiolate and ketone electrophile). A sequence consisting of Sonogashira coupling, acylation and hydrogenation delivered acetate 24, and Dieckmann cyclization provided beta-keto lactone 2.
[EN] The present invention relates to novel thiazolyldihydroindazoles of the general formula (I) where the R1, R2 and R3 radicals are each as defined in the claims and the description, to their tautomers, racemates, enantiomers, diastereomers and mixtures thereof, and where appropriate to their pharmacologically safe acid addition salts, solvates and hydrates, and to processes for preparing these thiazolyldihydroindazoles and to their use as medicaments. [FR] La présente invention concerne de nouveaux thiazolyl-dihydro-indazoles de formule générale (I), les radicaux R1, R2, Ra et Rb ayant les significations données dans les revendications et la description, leurs tautomères, racémates, énantiomères, diastéréoisomères et leurs mélanges, ainsi qu'éventuellement leurs sels d'addition acide, solvates et hydrates pharmacologiquement acceptables, ainsi que des procédés de fabrication de ces thiazolyl-dihydro-indazoles et leur utilisation en tant que médicament. [DE] Die vorliegende Erfindung betrifft neue Thiazolyl-Dihydro-Indazole der allgemeinen Formel (I) wobei die Reste R1, R2 und R3 die in den Ansprüchen und der Beschreibung genannten Bedeutungen haben, ihre Tautomere, Racemate, Enantiomere, Diastereomere und ihre Gemische, sowie gegebenenfalls ihre pharmakologisch unbedenklichen Säureadditionssalze, Solvate und Hydrate, sowie Verfahren zur Herstellung dieser Thiazolyl-dihydro-indazole und deren Verwendung als Arzneimittel