作者:V. A. Mamedov、A. M. Murtazina、A. T. Gubaidullin、E. A. Khafizova、I. Kh. Rizvanov、I. A. Litvinov
DOI:10.1007/s11172-010-0289-7
日期:2010.8
3-(2-aryl-2-oxoethylidene)-3,4-dihydroquinoxalin-2(1H)-ones with hydrazine hydrate (and phenylhydrazine), in boiling acetic acid undergo new acid-catalyzed rearrangement with the contraction of pyrazine ring of the quinoxaline system to form 2-(pyrazol-3-yl)benzimidazoles. Possible mechanisms of this rearrangement are considered.
摘要3-Aryl-1'H-spiro[2-pyrazoline-5,2'-quinoxalin]-3'(4'H)-ones, 可通过 3-(2-aryl-2-oxoethylidene)- 3,4-二氢喹喔啉-2(1H)-酮与水合肼(和苯肼)在沸腾的乙酸中经历新的酸催化重排,喹喔啉系统的吡嗪环收缩形成2-(吡唑-3-基)苯并咪唑。考虑了这种重排的可能机制。