Pd-Catalyzed Decarboxylative Olefination: Stereoselective Synthesis of Polysubstituted Butadienes and Macrocyclic P-glycoprotein Inhibitors
作者:Bichao Song、Peipei Xie、Yingzi Li、Jiping Hao、Lu Wang、Xiangyang Chen、Zhongliang Xu、Haitian Quan、Liguang Lou、Yuanzhi Xia、K. N. Houk、Weibo Yang
DOI:10.1021/jacs.0c00078
日期:2020.6.3
The efficient and stereoselective synthesis of polysubstituted butadienes, especially the multifunctional butadiene, represents a great challenge in organic synthesis. Herein, we wish to report a distinctive Pd(0) car-bene-initiated decarboxylative olefination approach that enables the direct coupling of diazo esters with vinylethylene carbonates (VECs), vinyl oxazolidinones, or vinyl benzoxazinones
Asymmetric Hydrogenation of α-Primary and Secondary Amino Ketones: Efficient Asymmetric Syntheses of (−)-Arbutamine and (−)-Denopamine
作者:Gao Shang、Duan Liu、Scott E. Allen、Qin Yang、Xumu Zhang
DOI:10.1002/chem.200700594
日期:2007.9.17
Two beta-receptor agonists (-)-denopamine and (-)-arbutamine were prepared in good yields and enantioselectivities by asymmetrichydrogenation of unprotected aminoketones for the first time by using Rh catalysts bearing electron-donating phosphine ligands. A series of alpha-primary and secondaryaminoketones were synthesized and hydrogenated to produce various 1,2-amino alcohols in good yields and
Efficient approach to thiazolidinones via a one-pot three-component reaction involving 2-amino-1-phenylethanone hydrochloride, aldehyde and mercaptoacetic acid
作者:Asha Vasantrao Chate、Akash Gitaram Tathe、Prajyot Jayadev Nagtilak、Sunil M. Sangle、Charansingh H. Gill
DOI:10.1016/s1872-2067(16)62536-6
日期:2016.11
Abstract A highly efficient three-componentreaction has been developed for the synthesis of thiazolidinones involving the reaction of 2-amino-1-phenylethanone hydrochloride with an aromatic aldehyde and mercaptoacetic acid in the presence of diisopropylethylamine in a single pot. Critically, this reaction exhibited excellent chemoselectivity, with the nitrogen atom of the 2-amino-1-phenylethanone
excellent antifungalactivities against five pathogenic strains with MIC values in the range of 0.03-1 μg/mL. Compounds with R1 = 3-F substituted and 15o and 15ae exhibited moderate antifungalactivities against fluconazole-resistant strains 17# and CaR with MIC values in the range of 1-8 μg/mL. Compounds with R1 = H or 2-F (such as 15a, 15o, 15p) displayed moderate to good antifungalactivity against