Radical Addition to Strained σ-Bonds Enables the Stereocontrolled Synthesis of Cyclobutyl Boronic Esters
作者:Mattia Silvi、Varinder K. Aggarwal
DOI:10.1021/jacs.9b03653
日期:2019.6.19
steroid boronic ester derivatives can be accessed. Additionally, although the use of electron-rich alkyliodides as radical precursors was found to be ineffective, an alternative route involving alkylsulfonylation of the BCB-boronate followed by reductive desulfonylation provided access to simplealkyl substituted cyclobutane products.
Enantiospecific sp2–sp3 coupling of secondary and tertiary boronic esters
作者:Amadeu Bonet、Marcin Odachowski、Daniele Leonori、Stephanie Essafi、Varinder K. Aggarwal
DOI:10.1038/nchem.1971
日期:2014.7
cross-coupling of boronic acids and related derivatives with sp2 electrophiles (the Suzuki–Miyaura reaction) is one of the most powerful C–C bond formation reactions in synthesis, with applications that span pharmaceuticals, agrochemicals and high-tech materials. Despite the breadth of its utility, the scope of this Nobel prize-winning reaction is rather limited when applied to aliphaticboronic esters. Primary
Development of Enantiospecific Coupling of Secondary and Tertiary Boronic Esters with Aromatic Compounds
作者:Marcin Odachowski、Amadeu Bonet、Stephanie Essafi、Philip Conti-Ramsden、Jeremy N. Harvey、Daniele Leonori、Varinder K. Aggarwal
DOI:10.1021/jacs.6b03963
日期:2016.8.3
functional groups (esters, azides, nitriles, alcohols, and ethers). The reaction also worked well with other electron-rich heteroaromatics and 6-membered ring aromatics provided they had donor groups in the meta position. Conditions were also found under which the B(pin)- moiety could be retained in the product, ortho to the boron substituent. This protocol, which created a new C(sp2)–C(sp3) and an adjacent