作者:G. P. Mrug、N. V. Bondarenko、S. P. Bondarenko、M. S. Frasinyuk
DOI:10.1007/s10600-018-2439-3
日期:2018.7
Recyclization by hydrazine of furo[3,2-b]pyrano[2,3-f]chromen-4-ones, dipyrano[2,3-b:2,3-f]chromen4-ones, and pyrano[2,3-a]xanthen-4-ones derived from natural isoflavonoids and their analogs was studied. The reaction was shown to proceed selectively with opening of the chromone ring. Several substituted 4-arylpyrazoles containing furo[3,2-b]chromen-5-ol, pyrano[2,3-b]chromen-6-ol, and xanthen-8-ol fragments were synthesized.
研究了从天然异黄酮及其类似物衍生得到的呋喃并[3,2-b]吡喃并[2,3-f]色烯-4-酮、二吡喃并[2,3-b:2,3-f]色烯-4-酮和吡喃并[2,3-a]咕吨-4-酮的肼解重排反应。反应显示以色烯环选择性开环进行。合成了含有呋喃并[3,2-b]色烯-5-醇、吡喃并[2,3-b]色烯-6-醇和咕吨-8-醇片段的多种取代4-芳基吡唑。