(i) Me2SO4, (ii) /BRN= 969542/; Multistep reaction;

triethylamine in benzene

sodium hydroxide in dichloromethane Irradiation (UV/VIS); a stirred soln. of Fe-complex and pentafulvene in CH2Cl2 was irradiated for 14 h with a 300-W sunlamp (Osram) in an atm. of N2, cooled to room temp., filtered, EtOH and 2 N NaOH were added, stirring was continued for another 90 min; layers were sepd., aq. layer dild., extd. with CH2Cl2, combined org. layers were washed twice with water, dried (Na2SO4), concd., residue was chromd. over alumina column (B II), recrystd. from ether-hexane or sublimed at 0.001 Torr;

in 1,2-dichloro-ethane Decomposition; retro-Diels-Alder reaction; 44 h; Heating; Product distribution;

in 1,2-dichloro-ethane Decomposition; retro-Diels-Alder reaction; 44 h; Heating; Product distribution;

1: in diethyl ether Inert atmosphere; 2: With acetylacetone in diethyl ether T=-40°C; Inert atmosphere;

triethylamine in benzene

triethylamine in benzene

(i) benzene, (ii) /BRN= 605365/, POCl3; Multistep reaction;

1: (i) POCl3, (ii) /BRN= 2204661/, (iii) (alkaline hydrolysis) 2: (i) aq. NaOH, (ii) H+ View Scheme