Allylic alcohols were readily converted into allylic iodides by hydrogen iodide generated in situ from chlorotrimethylsilane/sodium iodide and water, or alcohols, under mild conditions. Displacement of allylic alcohols containing a terminal double bond gave allylic iodides accompanied by allylic rearrangement. This procedure has successfully been extended to a one-pot synthesis of homoallylic alcohols by carrying out successive Barbier type reactions.
NEW HALOGENATION REAGENT SYSTEM FOR ONE-POT CONVERSION OF ALCOHOLS INTO IODIDES AND AZIDES<sup>*</sup>
作者:Ahmed Kamal、G. Ramesh、N. Laxman
DOI:10.1081/scc-100103316
日期:2001.1
In situ generation of hydrogen iodide from methanesulphonic acid/sodium iodide in different solvents was found to be an attractive reagent system for the chemoselective conversion of various alcohols to their corresponding iodides. Moreover, treatment of benzylic and allylic alcohols with this reagent system, followed by substitution with azide ion, produced the corresponding azides in one pot in good
homoallylic alcohols in good to excellent yields with high diastereoselectivities (>99:1 dr). Reversed diastereoselectivity was obtained when carbonylsubstrate (e. g., 2‐pyridinecarboxaldehyde, glyoxylic acid) containing chelating substituent was used in the allylation reaction. In addition, the reactions involving acyclic (E)‐cinnamyl bromide as substrate worked equally well with high diastereocontrol.
(Guanidine)copper Complex-Catalyzed Enantioselective Dynamic Kinetic Allylic Alkynylation under Biphasic Condition
作者:Xi-Yang Cui、Yicen Ge、Siu Min Tan、Huan Jiang、Davin Tan、Yunpeng Lu、Richmond Lee、Choon-Hong Tan
DOI:10.1021/jacs.7b12806
日期:2018.7.11
Highly enantioselective allylicalkynylation of racemic bromides under biphasic condition is furnished in this report. This approach employs functionalized terminalalkynes as pro-nucleophiles and provides 6- and 7-membered cyclic 1,4-enynes with high yields and excellent enantioselectivities (up to 96% ee) under mild conditions. Enantioretentive derivatizations highlight the synthetic utility of this
[EN] CYCLOALKYL PYRIMIDINES AS FERROPORTIN INHIBITORS<br/>[FR] PYRIMIDINES CYCLOALKYLIQUES UTILISÉES EN TANT QU'INHIBITEURS DE LA FERROPORTINE
申请人:GLOBAL BLOOD THERAPEUTICS INC
公开号:WO2021222363A1
公开(公告)日:2021-11-04
The subject matter described herein is directed to ferroportin inhibitor compounds of Formula I or I' and pharmaceutical salts thereof, methods of preparing the compounds, pharmaceutical compositions comprising the compounds, and methods of administering the compounds for prophylaxis and/or treatment of diseases caused by a lack of hepcidin or iron metabolism disorders, particularly iron overload states, such as thalassemia, sickle cell disease and hemochromatosis, and also kidney injuries.