C−C Bond-Forming Reactions via Pd-Mediated Decarboxylative α-Imino Anion Generation
摘要:
alpha-Imino anions are generated under neutral reaction conditions via a Pd-mediated decarboxylation of allyl diphenylglycinate imines with concomitant formation of a pi-allylpalladium species. The resulting delocalized anion can attack the pi-allyl-Pd(II) species or be intercepted by aldehydes to afford homoallylic amines or protected 1,2-amino alcohols, respectively.
C−C Bond-Forming Reactions via Pd-Mediated Decarboxylative α-Imino Anion Generation
摘要:
alpha-Imino anions are generated under neutral reaction conditions via a Pd-mediated decarboxylation of allyl diphenylglycinate imines with concomitant formation of a pi-allylpalladium species. The resulting delocalized anion can attack the pi-allyl-Pd(II) species or be intercepted by aldehydes to afford homoallylic amines or protected 1,2-amino alcohols, respectively.
[EN] COMPOSITIONS COMPRISING ENZYME CLEAVABLE LINKER PLATFORMS AND CONJUGATES THEREOF<br/>[FR] COMPOSITIONS COMPRENANT DES PLATEFORMES DE LIEURS CLIVABLES PAR UNE ENZYME ET LEURS CONJUGUÉS
申请人:UNIV DANMARKS TEKNISKE
公开号:WO2020260597A1
公开(公告)日:2020-12-30
The present invention relates to a cleavable linker platform. In particular, the invention relates to construction of an enzyme cleavable linker platform conjugated to a drug or a diagnostically relevant compound, a biomolecule, and an enzyme cleavable group, for which cleavage of the enzyme cleavable group leads to release of the drug or diagnostically relevant compound.
Palladium-Catalyzed Decarboxylative Generation and Asymmetric Allylation of α-Imino Anions
作者:Xiaoyan Qian、Pengfei Ji、Chang He、Jean-Olivier Zirimwabagabo、Michelle M. Archibald、Andrew A. Yeagley、Jason J. Chruma
DOI:10.1021/ol502693r
日期:2014.10.3
A palladium-catalyzedasymmetricdecarboxylativeallylicalkylation of allyl 2,2-diphenylglycinate imines using (S,S)-f-binaphane as a chiral supporting ligand has been developed. This transformation allows for decarboxylative generation and enantioselective allylation of nonenolate α-imino (2-azaallyl anions) to afford α-aryl homoallylic imines.
Exploring the Steric and Electronic Factors Governing the Regio- and Enantioselectivity of the Pd-Catalyzed Decarboxylative Generation and Allylation of 2-Azaallyl Anions
作者:Shuaifei Wang、Xiaoyan Qian、Yuanyu Chang、Jiayue Sun、Xiujing Xing、Wendy F. Ballard、Jason J. Chruma
DOI:10.1021/acs.joc.8b00491
日期:2018.4.6
The impact of the steric and electronic factors in both the para-substituted benzaldimine and 2,2-diarylglycine components on the regioselectivity and enantioselectivity of the palladium-catalyzed decarboxylative allylation of allyl 2,2-diarylglycinate aryl imines was explored. These studies revealed that using 2,2-di(2-methoxyphenyl)glycine as the amino acid linchpin allowed for the exclusive synthesis
Nickel-Catalyzed Decarboxylative Generation and Asymmetric Allylation of 2-Azaallyl Anions
作者:Chenlu Liu、Changfeng Deng、Han Yang、Xiaoyan Qian、Shaojian Tang、Michal Poznik、Jason J. Chruma
DOI:10.1021/acs.joc.9b01293
日期:2019.8.16
The first nickel-catalyzed asymmetric decarboxylative allylation (DcA) of allyl 2,2-diarylglycinate imines is reported. This transformation utilizes a chiral ferrocenyl bidentate ligand and a Ni(0) precatalyst to mediate the decarboxylative generation and asymmetric allylation of 2-azaallyl anions, affording α-aryl homoallylic imines in modest-to-high yields and moderate-to-high enantiomeric ratios
Tandem C−C Bond-Forming Processes: Interception of the Pd-Catalyzed Decarboxylative Allylation of Allyl Diphenylglycinate Imines with Activated Olefins
作者:Andrew A. Yeagley、Melissa A. Lowder、Jason J. Chruma
DOI:10.1021/ol901745x
日期:2009.9.3
Interception of the Pd-catalyzed decarboxylative allylation of allyl diphenylglycinate Imines with appropriately functionalized Michael acceptors, followed by Heck cyclization, allows for the efficient construction of relatively complex organoamine frameworks in one reaction vessel. The initial intercepted decarboxylative allylation Is remarkably insensitive toward solvent and catalyst, typically proceeding under ambient conditions.