2851-80-1

Usage

General Description

2,7-dimethyl-9H-fluorene is a polycyclic aromatic hydrocarbon compound with the chemical formula C15H12. It is a white to off-white crystalline solid that is insoluble in water but soluble in organic solvents. 2,7-dimethyl-9H-fluorene is commonly used as a building block in the synthesis of various organic compounds, including pharmaceuticals, dyes, and polymers. It is considered to be a hazardous chemical, as it is a suspected carcinogen and can cause irritation and damage to the respiratory system if inhaled. Additionally, 2,7-dimethyl-9H-fluorene is flammable and may release toxic fumes when heated to decomposition. Therefore, appropriate safety precautions should be taken when handling and storing this chemical.

Upstream product

• 61765-41-1 2,14-Dithia<3.3>(2,7)fluorenophan-6-on-S,S,S',S'-tetraoxid 
• 16218-28-3 2,7-diiodofluorene 

Downstream Products

• 132717-51-2 2,7-dimethyl-9-phenylfluoren-9-ol 
• 2941-87-9 2,7-dimethyl-9-fluorenecarboxylic acid 
• 2840-49-5 2,7-dimethyl-9H-fluoren-9-one 

Relevant academic research and scientific papers

Transanular Interaction in Phanes, 27: Models for Excimers and Exciplexes: Phanes of Fluorene, 9-Fluorenone, and 9-Fluorenyl Anion

anti- and syn-(2,7)-fluorenophane (1, 2) as well as their 5,16-dioxo and 5-oxo derivatives 3, 5, and 6 containing two or one 9-fluorenone units were synthesized: Cyclisation of the bis(bromomethyl) compounds 7 and 10 with the bis(mercaptomethyl) compounds 9 and 12 gave the dithiaphanes 14, 16, and 18 containing fluorene and 9-fluorenone units bridged at the 2,7-positions.Oxidation to the disulfones 15, 17, and 18 and vapour phase pyrolysis (500 degC, 0.1 Torr) led to 1/2, 3, and 5/6, respectively.The molecular geometry of 1 was determined by X-ray structure analysis.On treatment of suspensions of 1 and 2 in hexamethylphosphoric triamide with n-butyllithium in n-hexane red solutions of the dianions 21 and 22 were generated, which were characterized by 1H NMR spectroscopy.With deuterium oxide the dianion 22 yielded 2>-anti-(2,7)fluorenophane (24), with methyl iodide exo-5,exo-16-dimethyl-anti-(2,7)fluorenophane (26).Multiple metalation with n-butyllithium and reaction with methyl iodide led to 5,5,16,16-tetramethyl-anti-(2,7)flourenophane (27).