4432-72-8

Usage

InChI:InChI=1/C20H18/c1-2-4-20-18-12-10-16-7-5-15(6-8-16)9-11-17(13-14-18)19(20)3-1/h1-8,13-14H,9-12H2

Upstream product

• 81839-14-7 2,13-Dithia<3>(1,4)naphthalino<3>paracyclophan 
• 16814-21-4 (4-methylbenzyl)trimethylammonium bromide 
• 34874-39-0 (4-Methyl-1-naphthylmethylmethyl)-trimethylammoniumbromid 
• 1633-22-3 [2.2]Paracyclophan 
• 1048968-81-5 1,2-(4,5-[2.2]paracyclophano)-cyclohepta-1,3-diene 
• 104600-93-3 3-<2.2>-Paracyclophanoyl-propionsaeure 
• 19311-35-4 racemic 5-oxo-4,5,6,7-tetrahydro[2]paracyclo[2](1,4)naphthalenophane 
• 41791-10-0 1-(bromomethyl)-4-methylnaphthalene 
• 58791-49-4 1,4-bis(bromomethyl)naphthalene 
• 100320-95-4 4,5-Tetramethylen-<2.2>-paracyclophan 
• 116072-83-4 C₂₀H₁₈Se₂ 

Relevant academic research and scientific papers

Annulation of seven-membered rings to [2.2]paracyclophane

Tropylidenes 16 and 17 were prepared from [2.2]paracyclophane (10). On treatment with the corresponding trityl salts they were converted into tropyliophanes 26a (tetrafluoroborate) and 26b (perchlorate). With acetone, 26a furnished trapping product 27, wh

New Synthetic Method of Cyclophanes via Diselenacyclophanes

Syntheses of cyclic diselenides through diselenolates and the following deselenation reactions by means of three ways were studied.The preparation of the cyclic diselenides in the presence of excess sodium borohydride gave thirty-eight diselenides containing diselenacyclophanes and alicyclic diseleno compounds in high yields in addition to two triple-bridged selenacyclophanes.Photodeselenation of the diselenides in tris(dimethylamino)phosphine afforded series of cyclophanes in much higher yields than those of the other two methods, i.e. benzyne-Stevens rearrangement/Raney nickel hydrogenolysis and pyrolytic deselenation at ca. 650 deg C.The present study demonstrates that the photodeselenation method combined with the synthesis of their precursor diselenides, is much superior to the conventional dechalcogenation methods.

Transanular Interactions in Phanes, XXV. Structurally Isomeric Naphthalenoparacyclophanes

The structurally isomeric naphthalenoparacyclophanes 1, 2 and 3, having 1,4-, 1,5- and 2,6-bridged naphthalene moieties, respectively, were synthesized via the corresponding dithiaphanes 8, 9, 10.The photolytic desulfurization of 10 and the sulfur dioxide extrusion via vapour phase pyrolysis of the corresponding disulfone 11 to the highly strained 3 clearly demonstrate the limits of these preparative ring contraction methods.