Reactions of α-Oxoketenedithioacetals with Phenylmagnesium Bromide: Synthesis of Novel 1-Phenyl-1-methylthio-3-phenyl (or 2,3-Fused)-indenes and 2,3-Fused Heterocyclic-1,3-Diphenyl-2-alken-1-ones
Highly efficient synthesis of polysubstituted fluorene via iron-catalyzed intramolecular Friedel–Crafts alkylation of biaryl alcohols
作者:Soumen Sarkar、Sukhendu Maiti、Krishnendu Bera、Swapnadeep Jalal、Umasish Jana
DOI:10.1016/j.tetlet.2012.08.005
日期:2012.10
An efficient and mild Fe(III)-catalyzed intramolecular Friedel–Crafts alkylation of biaryl methanol derivatives has been developed to achieve the substituted fluorenederivatives. The present reaction provides an excellent alternative to published methods because of its high yields, operational simplicity, mild conditions, and use of inexpensive and sustainable catalyst.
Synthesis of Dihydro‐5<i>H</i>‐Benzo[<i>c</i>]‐Fluorenes, Dihydroindeno[<i>c</i>]‐Chromenes and Thiochromenes<i>via</i>Intramolecular Cyclization and their Effect on Human Leukemia Cells
series of 6,7-dihydro-5H-benzo[c]fluorenes. Their synthesis is based on an intramolecular-cyclization of tricyclic substrates, which has an alcohol functional group in acidic conditions at ambient temperature. Certain reaction optimization conditions reveal that triflic acid was the most convenient reagent for this transformation, affording a broad range of fluorene derivatives in a 37 to 93% yield
在这项工作中,我们描述了一系列 6,7-二氢-5H-苯并[ c ]芴的构建。它们的合成基于三环底物的分子内环化,三环底物在环境温度下的酸性条件下具有醇官能团。某些反应优化条件表明,三氟甲磺酸是该转化最方便的试剂,以 37% 至 93% 的产率提供范围广泛的芴衍生物。我们通过克级合成以及二氢茚并[ c ]-色烯硫色烯和薁烯衍生物的制备来说明该方法的稳健性。
SINGH GURDEEP; ILA HIRIYAKKANAWAR; JUNJAPPA HIRIYAKKANAWAR, SYNTHESIS,(1986) N 9, 744-747
作者:SINGH GURDEEP、 ILA HIRIYAKKANAWAR、 JUNJAPPA HIRIYAKKANAWAR