Access to Cyclic Amino Boronates via Rhodium-Catalyzed Functionalization of Alkyl MIDA Boronates
作者:Jeffrey D. St. Denis、C. Frank Lee、Andrei K. Yudin
DOI:10.1021/acs.orglett.5b02861
日期:2015.12.4
sulfamate esters derived from amphoteric α-boryl aldehydes. Depending on the substitution pattern of the boryl sulfamate ester, a diverse range of five- or six-membered ring heterocycles are accessible using this transformation. The highly chemoselective nature of the C–H functionalization reaction preserves the alkyl boronate functional group, which enables the synthesis of B–C–N and B–C–C–N motifs
Amine hemilability enables boron to mechanistically resemble either hydride or proton
作者:C. Frank Lee、Diego B. Diaz、Aleksandra Holownia、Sherif J. Kaldas、Sean K. Liew、Graham E. Garrett、Travis Dudding、Andrei K. Yudin
DOI:10.1038/s41557-018-0097-5
日期:2018.10
MIDA boryl group in boron transfer processes, and show that the hemilability of the nitrogen atom on the MIDA ligand enables boron to mechanistically resemble either a hydride or a proton. The first case involves a 1,2-boryl shift, in which boron migrates as a nucleophile in its tetracoordinate form. The second case involves a neighbouring atom-promoted 1,4-boryl shift, in which boron migrates as an electrophile