Dibora[10]annulenes: Construction, Properties, and Their Ring-Opening Reactions
作者:Weidong Zhang、Demei Yu、Zhijun Wang、Bingjie Zhang、Letian Xu、Guoping Li、Ni Yan、Eric Rivard、Gang He
DOI:10.1021/acs.orglett.8b03538
日期:2019.1.4
The selective construction of various dibora[10]annulenes through mild boron–tin exchange reactions is reported. Dibora[10]annulenes exhibit optical and electrochemical properties of value for future sensing applications. Controlled addition of the Lewis base pyridine to dibora[10]annulenes instigates a selective ring-opening reaction. This work explores a new area of boron chemistry that represents
Regioselective Catalytic and Stepwise Routes to Bulky, Functional-Group-Appended, and Luminescent 1,2-Azaborinines
作者:Marius Schäfer、Julian Schäfer、Rian D. Dewhurst、William C. Ewing、Mirjam Krahfuß、Maximilian W. Kuntze-Fechner、Marius Wehner、Christoph Lambert、Holger Braunschweig
DOI:10.1002/chem.201600653
日期:2016.6.13
The regioselective syntheses of 1,2‐azaborinines is achieved using an unsymmetrical iminoborane through both catalytic and stepwise modular routes. The 1,2‐azaborinine ring can be selectively functionalized in the 4‐ and/or 6‐position through control of the stepwise reaction sequence, allowing access to vinyl‐functionalized and redox‐active, luminescent, donor‐functionalized 1,2‐azaborinines. The electrochemistry
Synthesis of arylboronates by boron-induced ipso-deantimonation of triarylstibanes with boron trihalides and its application in one-pot two-step transmetallation/cross-coupling reactions
The reaction of triarylstibanes (1) with borontrihalides (BCl3, and BBr3) afforded arylboron dihalides (2) by utilizing all the three aryl groups on the antimony. Boron intermediates (2) were transformed to arylboronates (3) in good to excellent yields by treatment with methanol and 1,3-propanediol. Further, the Pd-catalyzed reactions of 2 with organic halides such as 1-bromonaphthalene and benzoyl
Two aryl amino borinium cations derived from Cl(Mes)B-NR2 (NR2 = TMP, HMDS) faced divergent outcomes. As the HMDS-substituted one underwent methylmigration from silicon to boron transforming the putative borinium ion to a silylium ion, [Mes-B-TMP]+ can initiate cyanosilylation and catalyse hydrosilylation of ketones and aldehydes.
Selective and Mild Synthesis of Mono- and Diarylated Group 13−15 Halides Using [CuMes]<i><sub>n</sub></i>, a Readily Available, Thermally Stable Organocopper(I) Reagent
作者:Frieder Jäkle、Ian Manners
DOI:10.1021/om9901224
日期:1999.7.1
an alternative to less selective organolithium and Grignard reagents or toxic mercury, tin, and organozinc compounds. [CuMes]5·toluene (1) was found to readily react with various main group metal halides MXn and RMXn (M = B, Sn; X = Cl, Br; R = nBu, Ph, 1,1‘-fc) to give, depending on the stoichiometry of the reactions, monoarylated, diarylated, or mixed substituted species MesMXn-1, Mes2MXn-2, and
有人研究了使用MESitylcopper(一种可溶性的,热稳定的芳基铜化合物)替代选择性较低的有机锂和格氏试剂或有毒的汞,锡和有机锌化合物的方法。[CuMES] 5 ·甲苯(1)易于与各种主族金属卤化物MX n和RMX n反应(M = B,Sn; X = Cl,Br; R = n Bu,Ph,1,1'- FC),得到,这取决于反应的化学计量,monoarylated,diarylated,或混合取代的物种MESMX ñ - 1,MES 2 MX ñ - 2,和MESRMX ñ - 1(2 -5)高产。