132488-71-2Relevant articles and documents
Optisch aktive Vinylboronate
Mikhail, Ibrahim,Kaufmann, Dieter
, p. 53 - 57 (1990)
The comparative synthesis of optical active vinylboronates starting with (-)-2,3-pinanediol (5) or (+)-diethyltartrate (7) and dichlorovinylborane (4a), vinylboronic acid (4c), and dibutyl vinylboronate (4d) is described.A new method for the synthesis of dihalovinylboranes 4a, 4b is presented.
Transborylation of alkenylboranes with diboranes
Bru, Gerard,Carbó, Jorge J.,Dominguez-Molano, Paula,Fernández, Elena,Maza, Ricardo J.,Salvado, Oriol
supporting information, p. 13361 - 13364 (2021/12/17)
Exchange of boryl moieties between alkenylboranes and diboron reagents has been postulated as a stereospecific cross-metathesis pathway with concomitant formation of mixed diboron reagents. DFT calculations propose a mechanism for the stereocontrolled C(sp2)-B/B′-B′ cross-metathesis with both symmetric and non-symmetric diboron reagents. This journal is
The preparation of optically active boronic ester substituted Δ2-isoxazolines
Wallace, Richard H.,Zong
, p. 87 - 91 (2007/10/03)
In this paper we report our recent results in the area of nitrile oxide cycloaddition to optically active vinylboronic esters to afford optically active boronic ester substituted Δ2-isoxazolines. In these studies, a number of optically active d
Pinanediol [α-(trimethylsilyl)allyl]boronate and related boronic esters
Tsai, David J. S.,Matteson, Donald S.
, p. 236 - 241 (2008/10/08)
Homologation of (+)-pinanediol phenylboronate with [chloro(trimethylsilyl)methyl]lithium yielded (αS)-and (αR)-[α-(trimethylsilyl)benzyl]boronic esters in a 73:27 ratio, as shown by peroxidic deboronation to the known α-(trimethylsilyl)benzyl alcohol. Similar homologations of pinanediol vinyl, (Z)-1-propenyl, and isobutyl boronates were carried out, but the diastereoisomeric ratios were not determined. Reaction of the allylic α-trimethylsilyl boronic esters with aldehydes was studied. Pinanediol or pinacol 3-(trimethylsilyl)-1-propene-3-boronates yielded mainly (Z)-1-(trimethylsilyl)-1-alken-4-ols with aldehydes. Pinanediol (Z)-1-(trimethylsilyl)-2-butene-1-boronate with benzaldehyde yielded (E)-1-(trimethylsilyl)-3-methyl-4-phenylbut-1-en-4-ol with only 4% Z isomer. The stereochemical implications and utility of these reactions in synthesis are discussed. A brief investigation indicated that pinanediol α-trimethylsilyl boronic esters can be desilylated to boronic esters by tetrabutylammonium fluoride in moist THF.