Total asymmetric synthesis of (-)-conduramine B-1 and of its enantiomer. N-Benzyl derivatives of conduramine B-1 are beta-glucosidase inhibitors
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The structure and absolute configuration of natural lentiginosine isolated from plant sources was determined to be (1S,2S,8aS)-1,2-dihydroxyindolizidine ((+)-4) on the basis of the synthesis of both enantiomers (+)-4 and (-)-4 and their inhibition of amylo ...
Epi-b-santalene (I; R = H), readily accessible in both enantiomeric forms, was regio- and stereoselectively converted into (R)-(-)- or (S)-(+)-(Z)-epi-b-santalol (I; R = OH) by consecutive metalation, borylation and oxidn. [on SciFinder (R)] ...
We tested the theoretical prediction that the band structures on the opposite sides of a homojunction can be artificially displaced in energy with respect to each other by means of double intralayers of atomiclike thickness, producing band discontinuities ...
N-[2-(hydroxymethyl)phenyl]pyrrole was found to be amenable to selective a-metalation. Trapping with a variety of electrophilic reagents afforded the expected products with moderate to high yields. Derivs. formed by treatment of the organometallic intermed ...
The photochem. of colloidal ZnS was studied under a variety of exptl. conditions. The time dependence of the photocorrosion was examd. by using time-resolved fluorescence, static fluorescence, and electrospectroscopy for chem. anal. (ESCA) techniques. A qu ...
The kinetics of an enzymic transesterification reaction were studied by considering a model reaction: the transesterification of a racemic mixt. of phenylalanine Pr ester with 1,4-butanediol by chymotrypsin (EC 3.4.21.1). The model developed, describing th ...