esters from phenols and alcohols and sulfonamides from amines was achieved in excellent yields. Majority of the phenols irrespective of their substituents electronic nature underwent tosylation nearly at same reactionrate with an average yield of 95%. For amines, ring activating substituents favors rapid sulfonylation while the ring deactivating substituents relatively lowers the rate of tosylation
Using an intramolecular nitrone cycloaddition and a Heck cyclization as the crucial transformations, a total synthesis of the racemic morphine alkaloid thebainone A was accomplished in 22 steps commencing with isovanillin.
unprecedented regioselective tosylation procedure for 2-ene 4,5,6,7-polyol derived from d-ribose involving chemoselective ditosylation and regioselective allylic tosyl hydrolysis upon work up with sat. NaCl (brine) solution in a single operation by minimizing the side products obtained under classical regioselective tosylation. The same reagent was also employed for rapid quantitative base free tosylation
Collisionally activated dissociation of N-acylpyridinium cations
作者:Alan R. Katritzky、Richard D. Burton、Petia A. Shipkova、Ming Qi、Clifford H. Watson、John R. Eyler
DOI:10.1039/a706086f
日期:——
substituents in the aroyl group. N-Alkylcarbonyl- and N-phenoxycarbonyl-pyridinium cations fragment via ion molecule complexes which dissociate to pyridinium cation and ketene or CO2 + aryne. N-Alkoxycarbonylpyridinium cations form pyridinium cations via detectable N-carboxypyridinium cations. The propensity of those cations to undergo SN1 or SN2 reactions is discussed.
已通过电喷雾电离(ESI)傅里叶变换离子回旋共振质谱(FTICRMS)在气相中测量了各种N-酰基吡啶鎓阳离子的相对裂解能。N-芳酰基-和N-杂芳酰基-吡啶鎓阳离子解离,生成游离ArCO +离子,其活化能通过稳定/去稳定芳酰基中的电子供体/受体取代基而大大降低/增加。N-烷基羰基-和N-苯氧基羰基-吡啶鎓阳离子通过离解成吡啶鎓阳离子和乙烯酮或CO 2 +芳烃的离子分子络合物裂解。ñ-烷氧羰基吡啶鎓阳离子通过可检测的N-羧基吡啶鎓阳离子形成吡啶鎓阳离子。讨论了那些阳离子进行S N 1或S N 2反应的倾向。
[EN] BCL-XL INHIBITOR ANTIBODY-DRUG CONJUGATES AND METHODS OF USE THEREOF<br/>[FR] CONJUGUÉS ANTICORPS-MÉDICAMENT INHIBITEURS DE BCL-XL ET LEURS PROCÉDÉS D'UTILISATION
申请人:NOVARTIS AG
公开号:WO2022115477A1
公开(公告)日:2022-06-02
Antibody-drug conjugates that bind to human oncology targets are disclosed. The antibody- drug conjugates comprise a Bcl-xL inhibitor drug moiety. The disclosure further relates to methods and compositions for use in the treatment of cancers by administering the antibody- drug conjugates provided herein. Linker-drug conjugates comprising Bcl-xL inhibitor drug moiety and methods of making same are also disclosed.