Catalytic Ring Expansion of Cyclic Hemiaminals for the Synthesis of Medium‐Ring Lactams
作者:Wanxiang Zhao、Hui Qian、Zigang Li、Jianwei Sun
DOI:10.1002/anie.201504926
日期:2015.8.17
A mild and efficient intermolecular ring‐expansion approach was developed for the synthesis of medium‐ringlactams by using siloxy alkynes. Key to success is the suitable combination of a superior catalyst and an exceptional nitrogen‐protecting group. Control experiments indicated that the reaction is remarkably selective toward the desired lactam formation, even with many possible non‐productive pathways
Exploration of the interrupted Fischer indolization reaction
作者:Alex W. Schammel、Ben W. Boal、Liansuo Zu、Tehetena Mesganaw、Neil K. Garg
DOI:10.1016/j.tet.2010.02.050
日期:2010.6
molecules has been developed. The strategy involves the condensation of hydrazines with latent aldehydes to ultimately deliver indoline-containing products by way of an interrupted Fischer indolization sequence. The method is convergent, mild, operationally simple, broad in scope, and can be used to access enantioenriched products. In addition, our approach is amenable to the synthesis of furoindoline
已经开发了一种收敛方法来访问存在于大量生物活性分子中的稠合二氢吲哚环系统。该策略涉及肼与潜在醛的缩合,以通过中断的 Fischer 吲哚化序列最终提供含二氢吲哚的产物。该方法收敛、温和、操作简单、适用范围广,可用于获得对映体富集的产品。此外,我们的方法适用于呋喃二氢吲哚和吡咯烷二氢吲哚天然产物的合成,如 physovenine 和 debromoflustramine B 的简洁正式全合成所证明的那样。 该策略可能会合成更复杂的目标,如公社生物碱。
[EN] COMPOSITIONS AND METHODS FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES<br/>[FR] COMPOSITIONS ET MÉTHODES DE TRAITEMENT DE MALADIES NEURODÉGÉNÉRATIVES
申请人:UNIV CALIFORNIA
公开号:WO2021142221A1
公开(公告)日:2021-07-15
Provided herein are compounds of Formula I and their salts, and compositions thereof that are useful for modulating neutral sphingomyelinase 2 (n-SMase2) and/or acetylcholinesterase (AChE) in cells. Also disclosed herein are methods of using the disclosed compounds and compositions for inhibiting the spread of Tau seeds from donor cells to recipient cells. Further disclosed herein are methods of using the disclosed compounds and compositions for treating or preventing a neurodegenerative disorder, such as a tauopathy, Alzheimer's disease (AD), Parkinson's disease (PD), Huntington's disease (HD), Lewy body dementia, frontotemporal dementia, and amyotrophic lateral sclerosis (ALS).
Understanding and Interrupting the Fischer Azaindolization Reaction
作者:Bryan J. Simmons、Marie Hoffmann、Pier Alexandre Champagne、Elias Picazo、Katsuya Yamakawa、Lucas A. Morrill、K. N. Houk、Neil K. Garg
DOI:10.1021/jacs.7b07518
日期:2017.10.25
Experimental and computationalstudies pertaining to the Fischer azaindolization reaction are reported. These studies explain why pyridylhydrazines are poorly reactive in Fischer indolization reactions, in addition to the origin of hydrazine substituent effects. Additionally, an interrupted variant of Fischer azaindolization methodology is disclosed, which provides a synthetic entryway into fused azaindoline
An Interrupted Fischer Indolization Approach toward Fused Indoline-Containing Natural Products
作者:Ben W. Boal、Alex W. Schammel、Neil K. Garg
DOI:10.1021/ol901383j
日期:2009.8.6
An efficient method to access the fused indoline ring system present in a multitude of bioactive molecules has been developed. The strategy involves the condensation of hydrazines with latent aldehydes to ultimately deliver indoline-containing products by way of an interrupted Fischer indolization sequence. Our studies show that the approach will likely be amenable to the synthesis of complex targets, such as the communesin natural products.