A mild and selective method for N-Boc deprotection
摘要:
A new mild method to remove N-tert-butyloxycarbonyl groups using TBAF in refluxing THF is reported. In all cases, the corresponding N-free products are obtained in good yields. The reactions are selective for acid- and base-sensitive groups, such as tert-butyl and alkyl esters, aldehydes. (C) 2002 Elsevier Science Ltd. All rights reserved.
[EN] IMIDAZOPYRIDINE DERIVATIVES AS MODULATORS OF TNF ACTIVITY<br/>[FR] DÉRIVÉS D'IMIDAZOPYRIDINE UTILISABLES EN TANT QUE MODULATEURS DE L'ACTIVITÉ TNF
申请人:UCB PHARMA SA
公开号:WO2014009295A1
公开(公告)日:2014-01-16
A series of imidazo[l,2-a]pyridine derivatives of formula (I), being potent modulators of human TNFa activity, are accordingly of benefit in the treatment and/or prevention of various human ailments, including autoimmune and inflammatory disorders; neurological and neurodegenerative disorders; pain and nociceptive disorders; cardiovascular disorders; metabolic disorders; ocular disorders; and oncological disorders.
A simple zincchloridemediated cyclization of ynamidyl N‐carbamates or 2‐ynamidyl‐(hetero)arylcarboxylates is achieved under mild reaction conditions, leading to the synthesis of useful heterocyclic scaffolds, 3H‐oxazol‐2‐ones and pyrrolo‐oxazin‐1‐ones, with good yields.
A Copper-Catalyzed N-Alkynylation Route to 2-Substituted N-Alkynyl Pyrroles and Their Cyclization into Pyrrolo[2,1-c]oxazin-1-ones: A Formal Total Synthesis of Peramine
作者:Brandon Reinus、Sean Kerwin
DOI:10.1055/s-0036-1588736
日期:2017.6
cross-coupling of alkynyl bromides with pyrroles, reveals that the use of the phenanthroline ligand 4,7-dimethoxy-1,10-phenanthroline affords a range of ynpyrroles in good to moderate yields. Furthermore, the utility of these ynpyrroles is demonstrated in the preparation of a series of pyrrolo[2,1-c][1,4]oxazin-1-ones and a formal total synthesis of the pyrrole natural product peramine. Screening of a variety of
[EN] PROCESS FOR THE PREPARATION OF N-[2-DIETHYLAMINO)ETHYL]-5-[(5-FLUORO-1,2-DIHYDRO-2-OXO-3H-INDOL-3-YLIDENE)METHYL]-2,4-DIMETHYL-1H-PYRROLE-3-CARBOXAMIDE<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE N-[2-DIÉTHYLAMINO)ÉTHYL]-5-[(5-FLUORO-1,2-DIHYDRO-2-OXO-3H-INDOL-3-YLIDÈNE)MÉTHYL]-2,4-DIMÉTHYL-1H-PYRROLE-3-CARBOXAMIDE
申请人:RATIOPHARM GMBH
公开号:WO2010136458A1
公开(公告)日:2010-12-02
The present invention relates to processes for the preparation of N-[2-(Diethylamino) ethyl]-5-[ (5-fluoro-1, 2 -dihydro-2-oxo-3H-indol-3-ylidene) methyl] -2, 4-dimethyl-I H-pyrrole- 3 -carboxamide of formula (VI).
Palladium-Catalyzed Direct CH Alkylation of Electron-Deficient Pyrrole Derivatives
作者:Lei Jiao、Thorsten Bach
DOI:10.1002/anie.201301154
日期:2013.6.3
What looks like a Friedel–Crafts alkylation reaction of electron‐deficient pyrroles is actually a PdII‐catalyzed, norbornene‐mediated CH activation reaction, in which the alkylation of the pyrrole core occurs by reductive elimination. As well as ethyl‐1H‐pyrrole‐2‐carboxylate (see scheme), several other 2,3‐disubstituted pyrroles underwent the selective C5 alkylation in good yield.
表观和实际:什么样子缺电子吡咯弗里德尔-克拉夫茨烷基化反应实际上是钯II催化的,降冰片烯体介导C ħ活化反应,其中,所述吡咯核的烷基化通过还原消除发生。除1 H H-吡咯2-羧酸乙酯(参见方案)外,其他几种2,3-二取代的吡咯也进行了选择性C5烷基化,收率很高。