Synthesis of 2-Arylethylamines by the Curtius Rearrangement
摘要:
2-Arylethylamine derivatives were synthesized using the Curtius reaction and with three different methods of preparing the acyl azide functional group. Carbamates derived from isocyanate were convenient protecting groups for alkylation of amines. Starting from benzaldehyde, amphetamine was prepared in three steps through an oxazolidin-2-one intermediate in 62% overall yield.
Pd(II)-Catalyzed Olefination of <i>sp</i><sup>3</sup> C−H Bonds
作者:Masayuki Wasa、Keary M. Engle、Jin-Quan Yu
DOI:10.1021/ja1010866
日期:2010.3.24
using N-arylamide directing groups. Following olefination, the resulting intermediates were found to undergo rapid 1,4-addition to give the corresponding gamma-lactams. Notably, this method was effective with substrates containing alpha-hydrogen atoms and could be applied to effect methylene C-H olefination of cyclopropane substrates.
Ligand-Enabled Cross-Coupling of C(sp<sup>3</sup>)–H Bonds with Arylsilanes
作者:Jian He、Ryosuke Takise、Haiyan Fu、Jin-Quan Yu
DOI:10.1021/jacs.5b00890
日期:2015.4.15
Pd(II)-catalyzed cross-coupling of C(sp(3))-H bonds with organosilicon coupling partners has been achieved for the first time. The use of a newly developed quinoline-based ligand is essential for the cross-coupling reactions to proceed.