Homodimeric coupling–cyclization reaction of 2,3-allenamides
摘要:
The PdCl2/Nal/K2CO3-catalyzed highly stereoselective homodimeric coupling-cyclization reaction of 2,3-allenamides afforded Z-bis(furanimine) derivatives. The addition of K2CO3 is crucial for this reaction and a possible mechanism is proposed. (C) 2009 Elsevier Ltd. All rights reserved.
A facile synthesis of β-allenyl furanimines via Pd-catalyzed cyclization of 2,3-allenamides with propargylic carbonates
摘要:
The Pd(OAc)(2)/TFP-catalyzed cyclization reaction of 2,3-allenamides in the presence of propargylic carbonates provides an efficient route to beta-allenyl furanimine derivatives. Preliminary mechanistic study showed that this reaction was probably initiated by Pd(0) species. (C) 2011 Elsevier Ltd. All rights reserved.