... Tetrahedron Letters. Volume 53, Issue 11, 14 March 2012, Pages 1413–1416. Cover image Cover image. An efficient copper(II)-catalyzed direct access to primary amides from aldehydes under neat conditions. ... 10, 4-Allyloxy C 6 H 4, 3, 95. 11, 4-Propargyloxy C 6 H 4, 3, 98. ...