[EN] MONOPHOSPHORUS LIGANDS AND THEIR USE IN CROSS-COUPLING REACTIONS<br/>[FR] LIGANDS À UN ATOME DE PHOSPHORE ET LEUR UTILISATION DANS DES RÉACTIONS DE COUPLAGE CROISÉ
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2011126917A1
公开(公告)日:2011-10-13
Phosphine ligands of the formula Ia, IB and mixtures thereof.
rhodium-catalyzed asymmetric hydroboration of α-arylenamides with BI-DIME as the chiral ligand and (Bpin)2 as the reagent yields for the first time a series of α-amino tertiaryboronicesters in good yields and excellent enantioselectivities (up to 99% ee).
NOVEL CHIRAL DIHYDROBENZOOXAPHOSPHOLE LIGANDS AND SYNTHESIS THEREOF
申请人:Boehringer Ingelheim International GmbH
公开号:US20180155375A1
公开(公告)日:2018-06-07
This invention relates to novel phosphorous ligands useful for organic transformations. Methods of making and using the ligands in organic synthesis are described. The invention also relates to processes for preparing the novel ligands.
BABIPhos Family of Biaryl Dihydrobenzooxaphosphole Ligands for Asymmetric Hydrogenation
作者:Guisheng Li、Olga V. Zatolochnaya、Xiao-Jun Wang、Sonia Rodríguez、Bo Qu、Jean-Nicolas Desrosiers、Hari P. R. Mangunuru、Soumik Biswas、Daniel Rivalti、Shuklendu D. Karyakarte、Joshua D. Sieber、Nelu Grinberg、Ling Wu、Heewon Lee、Nizar Haddad、Daniel R. Fandrick、Nathan K. Yee、Jinhua J. Song、Chris H. Senanayake
DOI:10.1021/acs.orglett.8b00139
日期:2018.4.6
Novel bidentate phosphine ligands BABIPhos featuring a biaryl bis-dihydrobenzooxaphosphole core are presented. Their synthesis was achieved via Pd-catalyzed reductive homocoupling of dihydrobenzooxaphosphole aryl triflates. An efficient route toward various analogues was also established, giving access to phosphines with different electronic and steric properties. The newly obtained ligands demonstrated
A Noncoordinating Acid–Base Catalyst for the Mild and Nonreversible <i>tert</i>-Butylation of Alcohols and Phenols
作者:Keith R. Fandrick、Nitinchandra D. Patel、Suttipol Radomkit、Arindom Chatterjee、Stefan Braith、Daniel R. Fandrick、Carl A. Busacca、Chris H. Senanayake
DOI:10.1021/acs.joc.1c00193
日期:2021.3.19
A mild and nonreversible tert-butylation of alcohols and phenols can be achieved in high yields using the noncoordinating acid–base catalyst [bis(trifluoromethane)sulfonimide and 2,6-lutidine] with a tert-butylation reagent, tert-butyl 2,2,2-trichloroacetimidate. This method allows the use of substrates containing acid sensitive groups such as ketal, Boc, and boronate esters.