The development of a new transition-metal-catalyzed transformation can often allow a traditional reaction, perhaps one that employs stoichiometric amounts of reagents and harsh reaction conditions, to be replaced by a selective, atom economic process which proceeds under mild reaction conditions. This is certainly the case with the recent report from Dong and co-workers of a catalytic enantiose...

[Chemical reaction: see text] We report the first examples of a Michael-Stork enamine addition to allenyl esters and ketones. Studies reveal that 2 equivalents of enamine are required for optimal yields. In the case of an allenyl methyl ketone, cyclopentyl enamine addition led to 8-oxobicyclo[3.2.1]octane formation, providing evidence for the in situ formation of an enamine intermediate followi...

The formation of ketone bodies and their excretion in the urine in albnormall amounts have for many years been problems of much interest to both physiologist and clinician. Much of our present knowledge of the subject has been gained from the study of carbohydrate metabolism in diabetes, where ketonuria in its classical formi is frequently observed. From this it has been established that an exc...

Brucine diol (BD) catalyzed asymmetric Morita–Baylis–Hillman (MBH) reaction is observed for the first time. N-oxide (BNO) was found to not have an effective chiral catalyst. Faster rate obtained using unsaturated ester or aromatic aldehydes in presence of BNO. 4-Nitrobenzaldehyde and α,β-unsaturated ketone/ester were converted MBH adduct moderate yields (up 74%) with 70% ee value by this cataly...

Abstract It is speculated that there might be some linkage between interstellar aldehydes and their corresponding alcohols. Here an observational study astrochemical modeling are coupled together to illustrate the connection them. The ALMA cycle 4 data of a hot molecular core, G10.47+0.03, utilized for this study. Various (acetaldehyde, propanal, glycolaldehyde), alcohols (methanol ethylene gly...

in this researchsaccharomyces cerevisiae (baker’s yeast) was used as a cheap, readily accessible, selective, efficient, and green bio-catalyst in a chemo selective reduction of carbonyl group to hydroxyl group. in this green procedure three substrates e.g. (3-(3-nitrophenyl)aziridin-2-yl)-1-phenyl-methanone, pyruvate ester, and 2-acetyl-γ-butyrolactone were reduced to their corresponding reduce...

An unusual reaction process that produced unexpected heterocyclic systems by a fragmentation-recombination mechanism is described. Thus treatment of the triketone, 3-acetyl-2,6-heptanedione, 1, with methanesulfonyl azide gave, in addition to the expected alpha-diazo ketone 3a, the dihydropyrazole 3c and its oxidation product, the pyrazole 3d. We propose that the initially formed alpha-diazo ket...