A short formal route to (±)-lepadin B using a xanthate-mediated free radical cyclisation/vinylation sequenceElectronic supplementary information (ESI) available: experimental and characterisation data for the transformation of 13 and 14. See http://www.rsc.org/suppdata/cc/b2/b203604e/
摘要:
以环己烯胺为起点,通过非对映选择性黄原酸盐介导的自由基环化/乙烯化序列,开发出了一条获得 (±)-lepadin B 的捷径。
Cobalt-catalyzed cyclization with the introduction of cyano, acyl and aminoalkyl groups
作者:Hiroto Hori、Shigeru Arai、Atsushi Nishida
DOI:10.1039/c9ob00637k
日期:——
An efficient synthesis of carbo- and heterocycles using CC, CO and CN bonds undercobaltcatalysis is described. The substituents on olefins are key for controlling the regio- and chemoselectivity in the initial hydrogen atom transfer step and quaternary carbons are efficiently constructed under mild conditions. Cyclopropane cleavage and tandem cyclization give highly functionalized bicyclic skeletons
Regioselective 7- and 8-endo cyclizations of selenoester derived 2-indolylacyl radicals upon amino tethered alkenes have been used to synthesize azepino[3,2-b]- and azocino[4,3-b]indoles, which are tricyclic subunits present in the indole alkaloids mersicarpine and apparicine, respectively.
硒酯衍生的2-吲哚基基团在氨基系链烯烃上的区域选择性7和8内环化反应已用于合成氮杂环庚烷[3,2- b ]-和偶氮基[4,3- b ]吲哚,它们是存在于三环亚基中的三环亚基吲哚类生物碱美卡西平和Apparicine。
Discovery of Novel 1-Cyclopentenyl-3-phenylureas as Selective, Brain Penetrant, and Orally Bioavailable CXCR2 Antagonists
作者:Hongfu Lu、Ting Yang、Zhongmiao Xu、Xichen Lin、Qian Ding、Yueting Zhang、Xin Cai、Kelly Dong、Sophie Gong、Wei Zhang、Metul Patel、Royston C. B. Copley、Jianing Xiang、Xiaoming Guan、Paul Wren、Feng Ren
DOI:10.1021/acs.jmedchem.7b01854
日期:2018.3.22
pharmacology with excellent selectivity over CXCR1 and other chemokine receptors. Rat and dog pharmacokinetics (PK) revealed good oral bioavailability, high oral exposure, and desirable elimination half-life of the compound in both species. In addition, the compound demonstrated dose-dependent efficacy in the in vivo pharmacology neutrophil infiltration “air pouch” model in rodents after oral administration. Further
SYNTHESIS AND APPLICATION OF CHIRAL SUBSTITUTED POLYVINYLPYRROLIDINONES
申请人:Kansas State University Research Foundation
公开号:US20200306737A1
公开(公告)日:2020-10-01
Chiral polyvinylpyrrolidinone (CSPVP), complexes of CSPVP with a core species, such as a metallic nanocluster catalyst, and enantioselective oxidation reactions utilizing such complexes are disclosed. The CSPVP complexes can be used in asymmetric oxidation of diols, enantioselective oxidation of alkenes, and carbon-carbon bond forming reactions, for example. The CSPVP can also be complexed with biomolecules such as proteins, DNA, and RNA, and used as nanocarriers for siRNA or dsRNA delivery.
Direct Amination of Secondary Alcohols Using Ammonia
作者:Dennis Pingen、Christian Müller、Dieter Vogt
DOI:10.1002/anie.201002583
日期:2010.10.25
Hydrogen shuttle: For the first time secondaryalcohols and ammonia can be directly converted into primary amines with a selectivity of up to 99 % by using a simple ruthenium/phosphine catalyst (see scheme; R1, R2= alkyl, aryl, alkenyl; M=[Ru3(CO)12]; and L=phosphine ligand).
氢穿梭:通过使用简单的钌/膦催化剂,仲醇和氨首次可直接以高达99%的选择性直接转化为伯胺(参见方案; R 1,R 2 =烷基,芳基,烯基; M = [Ru 3(CO)12 ];和L =膦配体)。