5210-87-7Relevant academic research and scientific papers
A simple procedure for preparing annulated p-benzoquinones. Improved synthesis of 1,4-dihydro-1,4-methanonaphthalene-5,8-dione
Marchand,Alihodzic,Shukla
, p. 541 - 546 (2007/10/03)
A simple and efficient two-step, one-pot synthesis of substituted 1,4-dihydro-1,4-methanonophthalene-5,8-diones is reported. This synthesis, which utilizes readily available starting materials and inexpensive reagents, can be used to prepare 1a-1c in 70-90% overall yield. This procedure was extended successfully to prepare a more highly complex annulated p-benzoquinone i.e., 8.
Some compounds along the pathway to unsymmetrically substituted secopentaprismanes
Sun, Duoli,Watson, William H.
, p. 721 - 737 (2007/10/03)
In the preparation of an unsymmetric, polyfunctional [5]-secoprismane hexachlorocyclopentadiene and 5,5-dimethoxy-1,2,3,4-tetrachlorocyclopentadiene were added sequentially to benzoquinone via Diels-Alder reactions. At one point oxidation of the hydroquinone of the diadduct is necessary, and cerium (IV) ammonium nitrate (CAN) is a common oxidizing agent. Oxidation of the diadduct with CAN led to cleavage of the dimethoxy bridge forming a substituted naphthoquinone. The structures of five Diels-Alder adducts and two reaction products of the naphthoquinone are discussed.
Molecular complexes of DMSQ
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, (2008/06/13)
The known compound, 1,2,3,4,9,9-hexachloro-1,4-dihydro-1,4-methanonaphthalene-5,8-diol (I) is an excellent flame retardant for ABS resins and polyurethanes, particularly, polyether-based polyurethanes. Compound (I) also forms novel molecular complexes with weak bases such as pyridine, pyridine HCl, pyridine oxide, dimethylsulfoxide and dimethylformamide, and which are excellent flame retardants for ABS resins. Compound (I) also exhibits unusual synergistic flame retardant effects in ABS resins and other polymers when used together with certain additives that are not themselves flame retardants.
