Stereoselective construction of trans-1,2-benzooxadecaline frameworks by three-component cascade reactions of an α-phenethyl-β-borylallylsilane with aldehydes
Highly Regioselective Silaboration of 3-Substituted 1,2-Dienes Catalyzed by Palladium/2,6-Xylyl Isocyanide
作者:Michinori Suginome、Yutaka Ohmori、Yoshihiko Ito
DOI:10.1055/s-1999-2917
日期:——
Regioselective silaboration of 3-substituted 1,2-dienes was efficiently catalyzed by palladium/2,6-xylyl isocyanide complex, affording an adduct, in which the boryl and silyl groups were introduced at the central allenyl carbon and at the substituted allenyl carbon, respectively.
Regio- and stereoselective synthesis of boryl-substituted allylsilanes via transition metal-catalyzed silaboration
作者:Michinori Suginome、Yoshihiko Ito
DOI:10.1016/s0022-328x(03)00441-8
日期:2003.8
yield 2-borylallylsilane selectively. The 2-borylallylsilanes served as useful allylation reagents in Lewis acid-mediated reactions with acetals and aldehydes. In addition to the simple allylation reactions, a cascade reaction to form the trans-9-boryl-1,2-benzooxadecalin skeleton and a cyclization reaction to form cyclic alkenylboranes were achieved by the use of 2-borylallylsilanes as key reagents. Reactions
Stereospecific Csp<sup>3</sup> Suzuki–Miyaura Cross-Coupling That Evades β-Oxygen Elimination
作者:Antonio J. LaPorte、Yao Shi、Jason E. Hein、Martin D. Burke
DOI:10.1021/acscatal.2c03245
日期:2022.9.2
within stereochemically defined secondary alkyl boronicester building blocks that are readily cross-coupled in a stereospecific manner. The steric effect-mediated decrease in reactivity toward transmetalation and deleterious side reactions associated with the cross-coupling of β-oxygen-containing Csp3 boronicesters are concomitantly addressed using β-aryloxysilyl groups as dual-purpose transmetalation-promoting
)pinacolborane to allenes in good yields. In the silaboration of terminalallenes having electron-donating substituents such as alkyl and methoxy groups, the SiB bond added to the internal CC bond with regioselective BC and SiC bond formation at the central and substituted carbon atoms of the allene, respectively. In contrast, the silylborane preferably added to the terminal CC bond with exclusive