2.2- Diphenyl-3-isopropenyl

Die Anwendung einer nur katalytischen Menge eines Lithium-amids (Lithium-pyrrolidid) ist fur die mit 90%iger Ausbeute verlaufende Reaktion von Benzophenon-methylimin mit Isopren zu 2,2-Diphenyl-3-isopropenyl-pyrrolidin beschrieben3. 

Hydroxy-3-methoxy-tctramethyl- 669 di-2-Hydroxymethyl-1 -methoxyearbonyl- 153 2-lsocyanat-2-methyl-1,1-diphenyl - 123 Isopropenyl- 67. 69... 

Under the same conditions 233b forms an analogous compound, whereas 1.1-di-methoxy-2.6-diphenyl-4-dimethylcarbenium-X -phosphorin-tetrafluoroborate 233, R and H = CH3) with bases produces the monomeric olefin (1.1-dimethoxy-2.6-diphenyl-4-isopropenyl-X -phosphorin). 

Addition of diarylcarbenes to buta-1,3-dienes results in 1,2-adduct formation and generation of the corresponding 2-alkenyl-l,l-diarylcyclopropanes in reasonable to excellent yield. When the C-C double bonds are nonidentical, mixtures of isomeric monoadducts are formed. Thus, irradiation of a mixture of diphenyldiazomethane and isoprene yielded 2-methyl-l,l-diphenyl-2-vinylcyclopropane (4, 38%) and 2-isopropenyl-l,l-diphenylcyclopropane (5, 35%). ... 

Im Falle der Thermolyse (100°) iiberlagern sich heterolytische Spaltungsprozesse, wie aus den auf-tretenden Produkten zu entnehmen ist tert.-Butanol (17% d.Th.), Aceton, dessenDimethylaoetal (20% d.Th.), Methyl-isopropenyl-Sther (40% d.Th.), 2,3-Dimethyl-2,3-diphenyl-butan (20% d.Th.) und Succinimid (99% d.Th.). 

Methyl m-2-Acetyl-A,A -diphenyl-2-(5-isopropenyl-2-methyl-2-cyclohcxenyi)glycinate (Table 4, Entry 7)52 ... 

S-isopropenyl-1-(4-nitropheny D-S-isopropenyl- 1-phenyl-l-(4-methoxyphenyl)-S-(2-nitrophenyl)-l-(4-methoxyphenyl)-5-(3-nitrophenyl)-S-(4-methoxyphenyl)-1 -(4-nitrophenyl)-l-(4-methoxyphenyl)-5-(4-pyridyl)-4- methyl-1,5-diphenyl-... 

Theoretically, the formation of polycarbonate by ester interchange between bisphenol A and diphenyl carbonate, as shown above, requires equimolar quantities of reagents. However, if equimolar quantities are used the polymer is liable to be discoloured. The reason for this lies in the thermal instability of bisphenol A. In the presence of alkali at temperatures above 150°C, bisphenol A decomposes into p-isopropenyl phenol and phenol ... 

Phenol with smaUer amounts of p-cresol, p-ethyl phenol, p-isopropyl- 201 phenyl phenol, bisphenol A, diphenyl ether, p-tolyl phenyl ether, p-ethyl diphenyl ether, p-isopropenyl diphenyl ether, isomers of lolyl (ethyl-phenyl)ether... 

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