An efficient and mechanistically interesting method for the synthesis of highly substituted isoquinolines by a Rh(III)-catalyzed hydrazone directed ortho C H bond activation and annulation without an external oxidant is described. This reaction is accomplished via a C-C and C-N bond formation along with N-N bond cleavage.
Extension of the Willgerodt–Kindler reaction: protected carbonyl compounds as efficient substrates for this reaction
Nitrogen derivatives of carbonyl compounds such Lis oximes. hydrazones, and semicarbazones were found to be excellent candidates for the Willgerodt-Kindler reaction. They can be used directly in a solvent-free reaction, under both classical and inicrowave conditions. to give the corresponding thiomorpholides in good yields. (C) 2004 Elsevier Ltd. All rights reserved.