Detail of "187-98-4"

CAS Number:
187-98-4
Name:
5,12[1',2']:6,11[1'',2'']-Dibenzenodibenzo[a,e]cyclooctene (9CI)
Molecular Structure:
Formula:
C28H16
Synonyms:
5,12:6,11-Di-o-benzenodibenzo[a,e]cyclooctene (8CI);9,10[9',10']-Anthracenoanthracene (7CI);9,9',10,10'-Tetradehydrodianthracene

Integral
10

Tel:86-531-81795097

Address:Jinan Huaxianchang Road 5, International ExhibitionCenter

Supplier:XINHUI PHARMACY [ Select your country]

Integral
10

Tel:0086-0373-6292261

Address:10th Floor,Tower A, Jincheng Oriental International,Commerical Inner Ring Rd.,Inner Ring,CBD,Eastern Zhengzhou New District,Henan,China

Please post your buying leads,so that our qualified suppliers will soon contact you!
*Required Fields

Diels-Alder reactions of tetradehydrodianthracene with electron-deficient dienes: Diels-Alder reactions of tetradehydrodianthracene with electron-deficient dienes. Sauer, Jurgen; Breu, Josef; Holland, Uwe; Herges, Rainer; Neumann, Helfried; Kammermeier, Stefan (Institut Organische Chemie, Universitat Regensburg, Regensburg D-93040, Germany). Liebigs Annalen/Recueil, (7), 1473-1479 (English) 1997 Wiley-VCH. CODEN: LIARFV.Several reagents such as 187-98-4 is used here. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Section cross-reference(s): 22 Theor. calcns. and simple MO considerations predict that a coplanar and spatially close arrangement of double bonds in structures such as dehydrodianthracene I, should both lower the LUMO and raise the HOMO energy of the p system. Thus the reactivity in Diels-Alder reactions towards electron-rich and electron-deficient dienes should be enhanced. The first effect has already been shown in a previous paper, the latter statement is now also confirmed by the reactivity of I in Diels-Alder reactions with inverse electron demand. In [4+2] cycloaddn. reactions of I with 1,2,4,5-tetrazines II (R = H, Me, CO2Me, CF3) the electronic effect of 3,6-substituents in tetrazines is far outweighed by steric factors resulting in an unexpected reactivity sequence: H ? Me u CO2Me > CF3. .