A Facile Preparation of N-(Isopropoxyalkyl) Amides by Generation and Trapping of N-Acyliminium Ions from Ionization-Rearrangement Reactions of N-Triflyloxy Amides
摘要:
A series of hydroxamic acids were converted to N-triflyloxy amides which were heated in 2-propanol to give N-(1-isopropoxyalkyl) amides in high yields. The method is simple, direct, and extremely tolerant of structural diversity both in the N-acyl group, as well as in the 1-isopropoxyalkyl group. N-Alkylation of secondary N-(1-isopropoxyalkyl) amides can be used for converting them to tertiary N-(1-isopropoxyalkyl) amides. N-Acyliminium ions of wide structural diversity can be generated easily from N-(1-isopropoxyalkyl) amides available by this methodology.
Bromotrifluoromethane: A Useful Reagent for Hydrotrifluoromethylation of Alkenes and Alkynes
作者:Xing Zheng、Xingang Zhang、Yu-Yan Ren
DOI:10.1055/s-0036-1591944
日期:2018.5
Bromotrifluoromethane (CF3Br) is a simple, inexpensive and abundant industrial material employed as a trifluoromethylating reagent. However, only limited strategies using CF3Br as a fluorine source are reported. Herein, we describe a visible-light-induced hydrotrifluoromethylation of alkenes and alkynes with CF3Br. The reaction proceeds under mild conditions with good functional group tolerance, providing
A ligand-controlled NiH-catalyzed migratory hydroalkylation of unactivated alkenes with the assistance of a simple amide directing group is developed. A range of structurally diverse α- and β-branched protected amines are conveniently synthesized via stabilization of 5 and 6-membered nickelacycles respectively.
[EN] NEW SPIROCYCLOHEXANE DERIVATIVES, PHARMACEUTICAL COMPOSITIONS CONTAINING THEM AND THEIR USES AS ANTI-APOPTOTIC INHIBITORS<br/>[FR] NOUVEAUX DÉRIVÉS DE SPIROCYCLOHEXANE, COMPOSITIONS PHARMACEUTIQUES LES CONTENANT ET LEURS UTILISATIONS COMME INHIBITEURS ANTI-APOPTOTIQUES
申请人:SERVIER LAB
公开号:WO2024008941A1
公开(公告)日:2024-01-11
Compounds of Formula (I): wherein R1, R2, R3, R4and are as defined in the description. Medicaments.
式 (I) 的化合物:其中 R1、R2、R3、R4 和如描述中所定义。药物。
Highly selective α-C(sp3)-H arylation of alkenyl amides via nickel chain-walking catalysis
作者:Haoran Shi、Jiaxin Wang、Yuqin Zhu、Hongyang Li、Guodong Ju、Lanlan Zhang、Chao Wang
DOI:10.1016/j.cclet.2023.109333
日期:2024.7
Herein, we report the migratory hydroarylation of unactivatedalkenes with aryl iodides using native and weakly coordinating amide directors under mild conditions. Synergistic coordination of the monodentate directing group and the ligand enable the highly regioselectivemigratory hydroarylation a chain walking process to form the thermodynamically stable five-membered nickelacyle intermediate. The
Herein we report a palladium-catalyzedoxidative N-α,β-dehydrogenation of amides to produce a range of enamides with high yields and excellent tolerance toward different functional groups. Mechanistic studies indicate that the reaction involves allylic C(sp3)–H activation followed by β-H elimination. The effectiveness of this approach is demonstrated through late-stage functionalization of bioactive molecules