Diagnostic imaging methods using rhenium and technetium complexes
申请人:Bracco International B.V.
公开号:US05688487A1
公开(公告)日:1997-11-18
Novel methods, processes and metal complexes attached to a hypoxia-localizing moiety comprising a metal, preferably radionuclide of rhenium or technetium; a hypoxia-localizing moiety; and, a complexing ligand, wherein said ligand and said radionuclide combined have cell membrane permeabilities greater than that of sucrose, are disclosed.
Photo-Organocatalytic Enantioselective Radical Cascade Reactions of Unactivated Olefins
作者:Pablo Bonilla、Yannick P. Rey、Catherine M. Holden、Paolo Melchiorre
DOI:10.1002/anie.201808183
日期:2018.9.24
Radical cascade processes are invaluable for their ability to rapidly construct complex chiral molecules from simple substrates. However, implementing catalytic asymmetric variants is difficult. Reported herein is a visible‐light‐mediated organocatalytic strategy that exploits the excited‐state reactivity of chiral iminium ions to trigger radical cascade reactions with high enantioselectivity. By combining
An efficient dehydrogenativeDiels–Alder (DHDA) reaction of prenylderivatives with 2,3‐dichloro‐5,6‐dicyanobenzoquinone (DDQ) has been developed under mild conditions, leading to a series of cyclohexene derivatives with good to excellent yields and excellent diastereoselectivity.
A nickel‐catalyzed three‐component reaction involving terminal alkynes, boronic acids, and alkyl halides is presented herein. Trisubstituted alkenes can be obtained in a highly regio‐ and stereocontrolled manner by the simultaneous addition of both aryl and alkylgroups across the triple bond in a radical‐mediated process. The reaction, devoid of air‐ and moisture‐sensitive organometallic reagents
19-Methyl-9-keto-15-hydroxy-prost-18-enoic acid derivatives and process
申请人:——
公开号:US04220798A1
公开(公告)日:1980-09-02
The invention provides novel 19-methyl-9-keto-15-hydroxy-prost-18-enoic, -prosta-13,18-dienoic and -prosta-5,13,18-trienoic acids and esters having antiulcer and antiasthma activity.