O-heterocycles bearing tetrasubstituted stereogenic centers are prepared via catalytic chemo- and enantioselective nucleophilic additions to ketoaldehydes, in which the ketone reacts preferentially over the aldehyde. Five- and six-membered rings with both aromatic and aliphatic substituents, as well as an...
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-al . if the carbonyl compound is a ketone we use the suffix -one. for example, retinal is an aldehyde required for vision. the first part of the name indicates that this compound is present in the retina and the suffix tells us that it is an aldehyde. another example of a common ...
Related to aldehyde group:ketone group,Anomeric carbon,Reducing sugar,Functional groups ThesaurusAntonymsRelated WordsSynonymsLegend: Switch tonew thesaurus Noun1.aldehyde group- the chemical group -CHO aldehyde radical chemical group,radical,group- (chemistry) two or more atoms bound together as a singl...
Related to aldehyde group: ketone group, Anomeric carbon, Reducing sugar, Functional groupsThesaurusAntonymsRelated WordsSynonymsLegend: Switch to new thesaurus Noun 1. aldehyde group - the chemical group -CHO aldehyde radical chemical group, radical, group - (chemistry) two or more atoms bound tog...
containing colour couplers for colour development such as those having reactive methylene or phenolic groups. The protein is preferably gelatin, and hardening agents mentioned are substances containing one or more aldehyde or ketone groups, ... PETERSON WILLARD D. 被引量: 8发表: 1942年 REACTIONS WI...
Methyl ethyl ketone 0.65–0.93 Gobba et al. (1997) a Methyl isobutyl ketone 0.90 Ogata et al. (1995) Alcohols Methanol 0.73–0.82 Imbriani and Ghittori (2005) a n-Butanol 0.73–0.82 Imbriani and Ghittori (2005) a Ethers Tetrahydrofuran 0.86–0.88 Ong et al. (1991) Amides Dimethylformamide...
A modestly enantioselective pyrrole carbinol formation has been investigated <05SL2420>. Treatment of lithium pyrrolate with aketoaldehydein the presence of a chiral ligand preferentially led to the formation of pyrrole carbinol49(50% ee). A hydroxy-directed reduction of the ketone in the side cha...
compound of formula (I) is a α,β-unsaturated ketone or aldehyde also knowns as an enol or an enal. Even more preferably, Rb is an alk-1-enyl group wherein the carbon carbon double bond is di-substituted.According to any one of the above embodiments of the invention, when Ra is a...
006749, WO-A-2008/006754) relate to particular doped zirconium dioxide-, copper- and nickel-containing catalysts, and to the use thereof in processes for preparing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and ammonia, a primary or secondary ...