Ethyleneketones ketones

Hydroxy-3,4 -dimethoxychalcone treated briefly with excess NaBH4 in methanol, the resulting oily intermediate separated by decantation and warmed with wet acetic acid -> 4, 8-dimethoxyflavan. Y 70%. F. e. s. L. Jurd, Chem. Ind. 1967, 2175 alcohols from a,y -ethyleneketones, also selective reduction to 2-ethylene-alcohols with LiAlH4, or to ketones with Li-hydrido-tert-butoxoaluminate s. W. L. Dilling and R. A. Plepys, Chem. Commun. 1969, 417. 

Ketones from a,/5-ethyleneketones s. 17, 82 stereospecific hydrogenation with Penicillium decumbens cf. T. L. Miller and E. J. Hessler, Biochim. Biophys. Acta 202, 354 (1970)... 

Sodium tetrahydridob or at eichloroplatinic acid Ketones from a,y -ethyleneketones Brown reduction... 

A soln. of startg. ketone in toluene, triethyl phosphite (for in situ reduction of labile hydroperoxide intermediates), and 5 mol% of the chiral cinchonine catalyst added successively to 50% aq. NaOH, and the mixture stirred vigorously at room temp, with 02-bubbling for 5 h - (S)-product. Y 95% (e.e. 79%). F.e. and cyclic p,y-ethylene-a-hydroxyketones from a,P-ethyleneketones s. M. Masui et al., Tetrahedron Letters 29, 2835-8 (1988). 

Dihydropyridines as reducing agents Hydrogen transfer under mild conditions Ketones from a,j -ethyleneketones s. 17, 80 ... 

Ketones from ethylenealcohols via alcohols Ketones from ethyleneketones... 

Palladium-carbon/benzylamine Amines from ketones and a,j -ethyleneketones -e-... 

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