Disclosed is a compound represented by formula (1) or a pharmacologically acceptable salt thereof (In the formula, A represents a group that is represented by formula (A-1); R
1a
and R
1b
may be the same or different and each independently represents a C
1-6
alkyl group which may be substituted by one to three halogen atoms; m and n each independently represents an integer of 0-5; X
1
represents a hydroxyl group or an aminocarbonyl group; Z
1
represents a single bond or the like; and R
2
represents an optionally substituted C
1-6
alkyl group, an optionally substituted C
6-10
aryl group or the like.)
Rh(III)-Catalyzed Decarboxylative <i>ortho</i>-Heteroarylation of Aromatic Carboxylic Acids by Using the Carboxylic Acid as a Traceless Directing Group
作者:Xurong Qin、Denan Sun、Qiulin You、Yangyang Cheng、Jingbo Lan、Jingsong You
DOI:10.1021/acs.orglett.5b00532
日期:2015.4.3
ortho-heteroarylation of aromatic carboxylicacids with various heteroarenes has been developed through Rh(III)-catalyzed two-fold C–H activation, which exhibits a wide substrate scope of both aromatic carboxylicacids and heteroarenes. The use of naturally occurring carboxylicacid as the directinggroup avoids troublesome extra steps for installation and removal of an external directinggroup.
Preparation of Polyfunctional Zinc Organometallics Using an Fe- or Co-Catalyzed Cl/Zn-Exchange
作者:Laurin Melzig、Coura R. Diène、Christoph J. Rohbogner、Paul Knochel
DOI:10.1021/ol201100p
日期:2011.6.17
A new Fe- or Co-catalyzed Cl/Zn-exchange reaction allows the direct transformation of aryl, heteroaryl, and also alkyl chlorides into the corresponding zinc reagents. The method tolerates functional groups such as a nitrile or an ester. Remarkably, secondary and tertiary alkyl chlorides are suitable substrates for the Cl/Zn exchange.