catalyzed C–O bond cleavage leading to the preparation of functional esters in the presence of N-methylpyrrolidin-2-one (NMP) was accomplished. Various substrates were well tolerated, and a gram-scale experiment was successfully realized. DFT calculations indicated that NMP plays a decisive role in accelerating nucleophilic attack of the functional acid to generate the functional esters in chlorobenzene
MACROCYCLIC COMPOUNDS USEFUL AS CHITINASE INHIBITORS
申请人:CYGNET BIOSCIENCES B.V.
公开号:EP3854789A1
公开(公告)日:2021-07-28
The present invention relates to macrocyclic compounds of formula (I) and their use as chitinase inhibitors as well as to pharmaceutical compositions and methods of preparation thereof. The compounds can in particular be used in the treatment, prevention and/or amelioration of asthma.
Iron-catalyzed azidation of cyclobutanol by C C bond cleavage
作者:Xiaoyuan Liu、Limei Wang、Jincheng Zhan、Shutao Sun、Lei Liu、Wei Li、Qian Wan
DOI:10.1016/j.tetlet.2024.155016
日期:2024.4
cyclobutanols through CC bond cleavage is disclosed for the first time. A range of tertiary cyclobutanols are tolerated providing γ-carbonyl-containing secondary alkyl azides. The method provides a straightforward approach for introducing azide group into aliphatic chain of organic molecules. A plausible mechanism involving radical-mediated sequential CC bond cleavage and C−N bond formation is proposed
首次公开了铁催化环丁醇通过CC键断裂的开环叠氮化反应。可以耐受一系列叔环丁醇,提供含γ-羰基的仲烷基叠氮化物。该方法提供了一种将叠氮基引入有机分子的脂肪链中的简单方法。提出了一种涉及自由基介导的连续 CC 键断裂和 CN 键形成的合理机制。
2-Amino-4-bis(aryloxybenzyl)aminobutanoic acids: A novel scaffold for inhibition of ASCT2-mediated glutamine transport
作者:Michael L. Schulte、Alexandra B. Khodadadi、Madison L. Cuthbertson、Jarrod A. Smith、H. Charles Manning
DOI:10.1016/j.bmcl.2015.12.031
日期:2016.2
Herein, we report the discovery of 2-amino-4-bis(aryloxybenzyl) aminobutanoic acids as novel inhibitors of ASCT2(SLC1A5)-mediated glutamine accumulation in mammalian cells. Focused library development led to two novel ASCT2 inhibitors that exhibit significantly improved potency compared with prior art in C6 (rat) and HEK293 (human) cells. The potency of leads reported here represents a 40-fold improvement over our most potent, previously reported inhibitor and represents, to our knowledge, the most potent pharmacological inhibitors of ASCT2-mediated glutamine accumulation in live cells. These and other compounds in this novel series exhibit tractable chemical properties for further development as potential therapeutic leads. (C) 2015 Elsevier Ltd. All rights reserved.
Potassium <i>tert</i>-Butoxide-Mediated Condensation Cascade Reaction: Transition Metal-Free Synthesis of Multisubstituted Aryl Indoles and Benzofurans
作者:Pengfei Yang、Weiyan Xu、Rongchao Wang、Min Zhang、Chunsong Xie、Xiaofei Zeng、Min Wang
DOI:10.1021/acs.orglett.9b01093
日期:2019.5.17
tert-butoxide-mediated condensation reactioninvolving a vinyl sulfoxide intermediate. Products are obtained from N- or O-benzyl benzaldehydes using dimethyl sulfoxide as a carbon source. The methodology features a wide functional group tolerance and transition metal-free environment. Preliminary mechanistic studies suggest that the reactioninvolves a tandem aldol reaction/Michaeladdition/dehydrosulfenylation/isomerization