cas 865350-17-0, 2-ALLENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE

Articles about 865350-17-0Total 6 be found

Allenylboronic Acid Pinacol Ester: A Selective Partner for [4 + 2] Cycloadditions
We have studied the reaction of allenylboronic acid pinacol ester with cyclopentadiene with experimental and computational methods. The reaction occurred efficiently with complete Diels-Alder periselectivity and regioselectivity at the proximal double bon
Labadie, Natalia,Medrán, Noelia S.,Pellegrinet, Silvina C.,Ramos Marchena, Juan M.
p. 5081 - 5085
(2021)
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An efficient method for the hydrolysis of potassium organotrifluoroborates promoted by montmorillonite K10
An efficient and non-expensive method for conversion of diverse potassium organotrifluoroborates to their corresponding boronic acids promoted by montmorillonite K10 using water as the reaction solvent is described. Further interconversion of potassium organotrifluoroborates to their corresponding boronic esters, via boronic acid intermediates was also successfully accomplished. The products were obtained in good yields, being the rate of hydrolysis influenced by the type of substituent present in the boronic acid.
Silva, Renato L.,Santos, Cosme S.,Santos, Jonh A. M.,Oliveira, Roberta A.,Menezes, Paulo H.,Freitas, Juliano C. R.
p. 1777 - 1785
(2018/09/04)

Silver-Catalyzed Enantioselective Propargylation Reactions of N-Sulfonylketimines
The enantioselective silver-catalyzed propargylation of N-sulfonylketimines is described. This reaction proceeds in high yield and excellent enantiomeric ratio and is compatible with a wide variety of diaryl- and alkylketimines. Synthetic transformations
Osborne, Charlotte A.,Endean, Thomas B.D.,Jarvo, Elizabeth R.
supporting information
p. 5340 - 5343
(2015/11/18)

Zinc-catalyzed allenylations of aldehydes and ketones
The general zinc-catalyzed allenylation of aldehydes and ketones with an allenyl boronate is presented. Preliminary mechanistic studies support a kinetically controlled process wherein, after a site-selective B/Zn exchange to generate a propargyl zinc int
Fandrick, Daniel R.,Saha, Jaideep,Fandrick, Keith R.,Sanyal, Sanjit,Ogikubo, Junichi,Lee, Heewon,Roschangar, Frank,Song, Jinhua J.,Senanayake, Chris H.
supporting information; experimental part
p. 5616 - 5619
(2011/12/03)

Improved method for the conversion of pinacolboronic esters into trifluoroborate salts: facile synthesis of chiral secondary and tertiary trifluoroborates
A general method for the preparation of virtually any potassium trifluoroborate salt from the corresponding pinacolboronic ester is reported. Thus, conditions for an azeotropic removal of pinacol from the reaction mixture were found to afford the desired potassium trifluoroborates of sufficient purity (>95%) in nearly quantitative yields irrespective of the nature of the product. The utility of this method is illustrated by the preparation of a broad range of enantioenriched secondary and tertiary potassium trifluoroborates.
Bagutski, Viktor,Ros, Abel,Aggarwal, Varinder K.
supporting information; experimental part
p. 9956 - 9960
(2010/02/27)

Catalytic four-component assembly based on allenylboronate platform: New access to privileged allylic amine structures
We developed a novel palladium-catalyzed four-component assembly based on allenylboronate platform, by which privileged allylic amine structures can be constructed in a regioselective, stereoselective, and diversity-oriented manner. The boryl group acts not only as a useful group that can be transformed to various functional groups afterward but also as a stereochemical controller in the generation of key (π-allyl)palladium intermediates. A short synthesis of rolipram (selective phosphodiesterase-4 inhibitor) is also demonstrated. Copyright
Tonogaki, Keisuke,Itami, Kenichiro,Yoshida, Jun-Ichi
p. 1464 - 1465
(2007/10/03)