Cobalt-Catalyzed α-Arylation of Substituted α-Halogeno β-Lactams
摘要:
The treatment of 3-bromo beta-lactams by an aryl Grignard, in the presence of CoCl2 (2 mol %) and TMEDA (2 mol %) in THF, produces 3-aryl beta-lactams in good yields and excellent diastereoselectivity.
Application of Sequential Cu(I)/Pd(0)-Catalysis to Solution-Phase Parallel Synthesis of Combinatorial Libraries of Dihydroindeno[1,2-<i>c</i>]isoquinolines
作者:Sarvesh Kumar、Thomas O. Painter、Benoy K. Pal、Benjamin Neuenswander、Helena C. Malinakova
DOI:10.1021/co200027c
日期:2011.9.12
methodology is compatible with a wide-range of aliphatic linear, branched, and ester functionalized N-substituents. Unexpectedly, the formation of regioisomers featuring a 1,2,3-contiguous substitution pattern in the aromatic ring of the indene core was observed. Three distinct combinatorial libraries with a total of 111 of members were synthesized, and 80 highly substituted dihydroindenoisoquinolines structurally
react with various aromatic aldehydes in the absence of any catalyst, solid support, or solvent, to give imines after a reaction time of eight minutes under microwave irradiation by a clean and very efficient process (yields: 75-100%). In the case of volatile amine, methylamine, 1,3-dimethylurea dispersed on montmorillonite Kl 0 is used as an amine precursor to prepare the corresponding imines.
作者:Belaud, Chantal、Roussakis, Christos、Letourneux, Yves、Alami, Najat El、Villieras, Jean
DOI:——
日期:——
Cobalt-Catalyzed α-Arylation of Substituted α-Halogeno β-Lactams
作者:Vanessa Koch、Mélanie M. Lorion、Etienne Barde、Stefan Bräse、Janine Cossy
DOI:10.1021/acs.orglett.9b02122
日期:2019.8.16
The treatment of 3-bromo beta-lactams by an aryl Grignard, in the presence of CoCl2 (2 mol %) and TMEDA (2 mol %) in THF, produces 3-aryl beta-lactams in good yields and excellent diastereoselectivity.