A Practical, Metal-Free Synthesis of 1<i>H</i>-Indazoles
作者:Carla M. Counceller、Chad C. Eichman、Brenda C. Wray、James P. Stambuli
DOI:10.1021/ol800053f
日期:2008.3.1
The synthesis of 1H-indazoles is achieved from o-aminobenzoximes by the selective activation of the oxime in the presence of the amino group. The reaction occurs with a variety of substituted o-aminobenzoximes using a slight excess of methanesulfonyl chloride and triethylamine at 0-23 degrees C and is amenable to scale-up. The synthesis of 1H-indazoles under these conditions is extremely mild compared
One-Pot Synthesis of 4-Quinolone via Iron-Catalyzed Oxidative Coupling of Alcohol and Methyl Arene
作者:Seok Beom Lee、Yoonkyung Jang、Jiwon Ahn、Simin Chun、Dong-Chan Oh、Suckchang Hong
DOI:10.1021/acs.orglett.0c03011
日期:2020.11.6
Herein, we describe the iron(III)-catalyzed oxidative coupling of alcohol/methyl arene with 2-amino phenyl ketone to synthesize 4-quinolone. Alcohols and methyl arenes are oxidized to the aldehyde in the presence of an iron catalyst and di-tert-butyl peroxide, followed by a tandem process, condensation with amine/Mannich-type cyclization/oxidation, to complete the 4-quinolone ring. This method tolerates
Hydroxyalkanoylaminolactams and related structures as inhibitors of a beta protein production
申请人:——
公开号:US20020052360A1
公开(公告)日:2002-05-02
This invention relates to novel lactams having the formula (I):
1
to their pharmaceutical compositions and to their methods of use. These novel compounds inhibit the processing of amyloid precursor protein and, more specifically, inhibit the production of A&bgr;-peptide, thereby acting to prevent the formation of neurological deposits of amyloid protein. More particularly, the present invention relates to the treatment of neurological disorders related to &bgr;-amyloid production such as Alzheimer's disease and Down's Syndrome.
Hydroxyalkanoylaminolactams and related structures as inhibitors of A-beta protein production
申请人:——
公开号:US20030166636A1
公开(公告)日:2003-09-04
This invention relates to novel lactams having the formula (I):
1
to their pharmaceutical compositions and to their methods of use. These novel compounds inhibit the processing of amyloid precursor protein and, more specifically, inhibit the production of A&bgr;-peptide, thereby acting to prevent the formation of neurological deposits of amyloid protein. More particularly, the present invention relates to the treatment of neurological disorders related to &bgr;-amyloid production such as Alzheimer's disease and Down's Syndrome.
Experimental and Computational Studies on Cp*<sup>Cy</sup>Rh(III)/KOPiv-Catalyzed Intramolecular Dehydrogenative Cross-Couplings for Building Eight-Membered Sultam/Lactam Frameworks
作者:Liping Li、Hui Gao、Ming Sun、Zhi Zhou、Wei Yi
DOI:10.1021/acs.orglett.0c01823
日期:2020.7.17
is an unusual Cp*CyRh(III)-catalyzed intramolecular site-specific aryl C–H annulation, a highly chemoselective protocol providing direct access to eight-membered sultams/lactams with broad substrate/functional group tolerance. Experimental and computational studies reveal that such a transformation involves a unique PivOH-assisted aryl C–H activation/alkene insertion/β-H elimination/hydrogen-transfer