Cyclohexyl phenyl ketone

Benzoylcyclohexene gives, after removal of the ether, phenyl cyclohexyl ketone, which is recrystallized from petroleum ether, mp 52° (80%). 

Recently a complete product study has been carried out for benzil irradiated in cyclohexane.63 A complex mixture containing benzaldehyde, phenyl-cyclohexyl ketone, benzoin benzoate, benzoin, benzoic acid, and smaller amounts of other compounds containing from three to six benzyl groups was obtained. 

Ramamurthy and coworkers reported the photochemical electron-transfer-initiated intermolecular hydrogen transfer reaction [80,81] of phenyl cyclohexyl ketone 25 in chiral amine-immobilized zeolk cavities. 

Figure 3 Photoreaction of phenyl cyclohexyl ketone within NaY in presence and ab sence of a chiral inductor. GC (Supelco p-dex column) traces are shown above.

Figure 4 The ratio of the intermolecular to intramolecular hydrogen abstraction products from phenyl cyclohexyl ketone within NaY depended on the nature of the electron donor. The GC traces of the product mixture are shown above. indicates the number of chiral inductor molecules per cage.

The strategy presented above with phenyl cyclohexyl ketone has been established to be general by investigating a number of aryl alkyl ketones and diaryl ketones [281,283]. The best cases of % ee are summarized in Schemes 14 and 15. 2-Ethoxybenzophenone 32 gives intramolecular cyclization product 33 as the only product in solution as well as within NaY. However, in NaY in the presence of chiral amines, intermolecular reduction product 34, in addition to 33, was obtained (Scheme 16). More importantly, with pseudoephedrine and (l/ ,2/ )-... 

Figure 6 Structures of complexes Li+ bound to phenyl cyclohexyl ketone and norephedrine as calculated by Gaussian-98/B3LYP/6 31G. The energy is included below each structure. Of the four structures, the structure (a) is the most stable.

PHENYL CYCLOHEXYL KETONE see PES750 trans-2-PHENYLCYCLOPROPYLAMINE see PET750 PHENYLDIBROMOARSINE see DDR200 PHENYL DICHLORARSINE see DGB600 PHENYLDICHLOROARSINE see DGB600 PHENYLDICHLOROPHOSPHINE see DGE400... 

The quantum yield for disappearance of benzil at 3660 A in cyclohexane solution has been estimated to be not greater than 0.25. This reaction produced 37> a complex mixture of products including benzoic acid, benzaldehyde and phenyl cyclohexyl ketone which suggest that the dione underwent cleavage to benzoyl radicals. Hydrogen abstraction appears to be the major process in other solvents. 

Preparation by adding a solution of 30% hydrobro-mic acid in acetic acid to a solution of 4-(benzyloxy) -3-methoxy-phenyl cyclohexyl ketone in methylene chloride with stirring 2 h at r.t. (77%) [1084]. H NMR [1084], MS [1084]. 

Preparation of 2-(2-tert-butoxycarbonyl-2-propenyl)phenyl cyclohexyl ketone 225 via oxidative addition of zinc to the aryl iodide 226 ... 

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