On the baker's yeast mediated transformation of α-bromoenones. Synthesis of (1S,2R)-2-bromoindan-1-ol and (2S,3S)-3-bromo-4-phenylbutan-2-ol
摘要:
Fermenting baker's yeast converts alpha-bromo substituted enones 7 and 10 into enantiomerically pure (1S,2R)2-bromoindan-1-ol 3 and (2S,3S)-3-bromo-4-phenylbutan-2-ol 11, respectively, through the intermediacy of the corresponding saturated ketones. Structurally related 16 provides the (2R)-allylic alcohol 17 prevalently. (C) 1998 Elsevier Science Ltd. All rights reserved.
A sustainable byproduct catalyzed domino strategy: facile synthesis of α-formyloxy and acetoxy ketones via iodination/nucleophilic substitution/hydrolyzation/oxidation sequences
The sustainable byproduct catalyzed domino strategy has been performed for the facilesynthesis of alpha-formyloxy and acetoxy ketones via iodination/nucleophilic substitution/hydrolyzation/oxidation sequences from simple and readily available aromatic ketones/unsaturated methyl ketones.
The oxidation of diethyl ω-phenylalkenylmalonates by Mn(III) acetate in acetic acid and Fe(III) perchlorate nonahydrate in acetonitrile or acetonitrile/acetic anhydride is investigated. Diethyl cinnamylmalonates 1, 2 and 3 afford intramolecular addition products to the double bond (cyclopropanes 10) and to the aromatic ring (tetrahydronaphthalenes 8 or 9). A mechanism based on a fast and reversible
Brunovlenskaya, I. I.; Kusainova, K. M.; Kashin, A. K., Journal of Organic Chemistry USSR (English Translation), 1988, vol. 24, # 2, p. 316 - 320
作者:Brunovlenskaya, I. I.、Kusainova, K. M.、Kashin, A. K.
DOI:——
日期:——
Functional group hybrids. Reactivity of .alpha.'-nucleofuge .alpha.,.beta.-unsaturated ketones. 1. Reactions with organocopper reagents
作者:Thomas R. Barbee、Kim F. Albizati
DOI:10.1021/jo00024a014
日期:1991.11
A series of alpha-nucleofuge alpha',beta'-unsaturated ketones encompassing a variety of structural types and nucleofuges was prepared. Treatment of these compounds with lithium dimethylcuprate or methylcopper leads primarily to either reductive cleavage of the alpha-nucleofuge or conjugate addition. Good alpha-nucleofuges favored the reduction pathway while poorer nucleofuges favored conjugate addition.
Morimoto, Takashi; Hirano, Masao; Enokida, Takashi, Journal of the Chemical Society. Perkin transactions II, 1988, p. 1531 - 1536