Stereochemical studies. XLVII. Asymmetric reduction of 2-alkyl-1,3,4-cyclopentanetriones with lithium aluminum hydride decomposed by optically active .BETA.-aminoalcohols. Syntheses of optically active allethrolone and prostaglandin E1.
Some Peculiarities of the Reduction of Di- and Trichlorocyclopentenones
摘要:
The hydrogenation of 5-allyl- and 5-(2-methylbut-3-en-2-yl)-2,3,5-trichlorocyclopentenones in methanol in the presence of 10% Pd/C is accompanied by exhaustive dechlorination with the formation of 3-propyl- and 3-(2-methylbutan-2-yl)cyclopentane-1,2,4-triones.