Novel one-pot access to 2-formyl/acetyl-1-substituted pyrrolo[2,3-b]quinoxalines under Sonogashira reaction conditions
摘要:
A one-pot reaction of N-alkyl-3-chloroquinoxaline-2-amines with acetylenic alcohols in the presence of a Pd-Cu catalyst leads to the formation of 2-formyl/acetyl-N-substituted pyrrolo[2,3-b]quinoxalines in good to high yields. A possible mechanism for the conversion has also been proposed.
A one-pot reaction of N-alkyl-3-chloroquinoxaline-2-amines with acetylenic alcohols in the presence of a Pd-Cu catalyst leads to the formation of 2-formyl/acetyl-N-substituted pyrrolo[2,3-b]quinoxalines in good to high yields. A possible mechanism for the conversion has also been proposed.
Synthesis of Unexpected Pyrrolo[2,3-b]quinoxaline-2-carbaldehydes via Sonogashira Coupling Reaction
作者:Ali Keivanloo、Mohammad Bakherad、Amin Rahimi
DOI:10.1055/s-0029-1218715
日期:2010.5
The reaction of a number of N-alkyl-3-chloroquinoxaline-2-amines with propargyl bromide in the presence of PdCl2(PPh3)2 and copper(I) iodide in wet morpholine leads to the formation of the unexpected N-substituted pyrrolo[2,3-b]quinoxaline-2-carbaldehydes in good yields. A possible mechanism for the conversion is suggested.