Protodeborylation of Triorganoboranes
نویسندگان
چکیده
Protodeborylation of triorganoboranes, usually carried out under mild reaction conditions using an excess of acetic acid, affords 1,5-dialkyl-3,7-dimethyl-4,8,9-trioxa-2,6-dioxonia-1,5-diboratabicyclo [3.3.1]nona-2,6-dienes OB(R)OC(Me)OB(R)OC(Me)O [1 (R = Et), 2 (R = cyclooctyl)]. Acetoxy(dialkyl)boranes and di(acetoxy)alkylboranes were not formed in an appreciable amount. Compounds 1 and 2 were characterized by NMR spectroscopy (1H, 11B, 13C NMR) in solution, the molecular structure of 2 was determined by X-ray analysis. The gas-phase geometry of 1 was optimized by calculations [B3LYP/6-311+G(d, p) level of theory], and its NMR parameters were also calculated at the same level of theory.
منابع مشابه
Development of a palladium-catalyzed decarboxylative cross-coupling of (2-azaaryl)carboxylates with aryl halides.
A catalytic method for the decarboxylative coupling of 2-(azaaryl)carboxylates with aryl halides is described. The decarboxylative cross-coupling presented is mediated by a system catalytic in both palladium and copper without requiring stoichiometric amounts of organometallic reagents or organoboronic acids. This method circumvents additional synthetic steps required to prepare 2-azaaryl organ...
متن کاملSynthesis of α‐Chiral Ketones and Chiral Alkanes Using Radical Polar Crossover Reactions of Vinyl Boron Ate Complexes
Vinyl boron ate complexes of enantioenriched secondary alkyl pinacolboronic esters undergo stereospecific radical-induced 1,2-migration in radical polar crossover reactions. In this three-component process various commercially available alkyl iodides act as radical precursors and light is used for chain initiation. Subsequent oxidation and protodeborylation leads to valuable α-chiral ketones an...
متن کاملIntramolecular B/N frustrated Lewis pairs and the hydrogenation of carbon dioxide.
The FLP species 1-BR2-2-NMe2-C6H4 (R = 2,4,6-Me3C6H2, 2,4,5-Me3C6H2) reacts with H2 in sequential hydrogen activation and protodeborylation reactions to give (1-BH2-2-NMe2-C6H4)2. While reacts with H2/CO2 to give formyl, acetal and methoxy-derivatives, reacts with H2/CO2 to give C6H4(NMe2)(B(2,4,5-Me3C6H2)O)2CH2. The mechanism of CO2 reduction is considered.
متن کاملAssessment of the Components of Financial Potential of the Regions of Ukraine
The relevance of the topic of the study is due to the fact that in Ukraine today, the need to form a perfect system of public finances, stabilize and overcome the uneven regional development of the national economy, which should guarantee a corresponding increase in the financial potential of the regions, is of particular importance. as a result of the analysis of the dynamics of the volumes of...
متن کاملPsychological Features of the Formation of Corporeality in Young Women
The aim of the study is to reveal the essence and structure of the programme for the development of female corporeality, identify psychological features of work in the context of individual consultations, describe the content of group classes, and analyse empirical data obtained as a result of the programme implementation. Methods: Young women under the age of 40, without clinical psychiatric ...
متن کامل