Copper-Mediated N-Alkynylation of Carbamates, Ureas, and Sulfonamides. A General Method for the Synthesis of Ynamides
作者:Joshua R. Dunetz、Rick L. Danheiser
DOI:10.1021/ol035647d
日期:2003.10.1
[reaction: see text] A general amination strategy for the N-alkynylation of carbamates, sulfonamides, and chiral oxazolidinones and imidazolidinones is described. A variety of substituted ynamides are available by deprotonation of amides with KHMDS followed by reaction with CuI and an alkynyl bromide.
[反应:见正文] 描述了氨基甲酸酯、磺酰胺、手性恶唑烷酮和咪唑烷酮的 N-炔基化的一般胺化策略。通过用 KHMDS 对酰胺进行去质子化,然后与 CuI 和炔基溴反应,可以获得各种取代的炔酰胺。
A Copper-Catalyzed C−N Bond Formation Involving sp-Hybridized Carbons. A Direct Entry to Chiral Ynamides via N-Alkynylation of Amides
作者:Michael O. Frederick、Jason A. Mulder、Michael R. Tracey、Richard P. Hsung、Jian Huang、Kimberly C. M. Kurtz、Lichun Shen、Christopher J. Douglas
DOI:10.1021/ja021304j
日期:2003.3.1
A copper-catalyzed new C-N bond formation involving a sp-hybridized carbon is described here leading to a facile entry for syntheses of chiral ynamides. This direct N-alkynylation of amides should have a significant impact on the future development of synthetic methodologies employing ynamides.