Organocatalyzed, Visible-Light Photoredox-Mediated, One-Pot Minisci Reaction Using Carboxylic Acids via <i>N</i>-(Acyloxy)phthalimides
作者:Trevor C. Sherwood、Ning Li、Aliza N. Yazdani、T. G. Murali Dhar
DOI:10.1021/acs.joc.8b00205
日期:2018.3.2
one-pot Minisci reaction has been developed using visible light, an organic photocatalyst, and carboxylic acids as radical precursors via the intermediacy of in situ-generated N-(acyloxy)phthalimides. The conditions employed are mild, demonstrate a high degree of functional group tolerance, and do not require a large excess of the carboxylic acid reactant. As a result, this reaction can be applied to
[EN] HETEROARYL-CYCLOHEXYL-TETRAAZABENZO[E]AZULENES AS VASOPRESSIN V1A RECEPTOR ANTAGONISTS<br/>[FR] HÉTÉROARYL-CYCLOHEXYL-TÉTRAAZABENZO[E]AZULÈNES COMME ANTAGONISTES DES RÉCEPTEURS DE LA VASOPRESSINE V1A
申请人:HOFFMANN LA ROCHE
公开号:WO2011131596A1
公开(公告)日:2011-10-27
The present invention is concerned with heteroaryl-cyclohexyl-tetraazabenzo[e]azulenes of formula (I) wherein R1, R2 and R 3 are as described herein. The compounds according to the invention act as Via receptor modulators, and in particular as Via receptor antagonists, their manufacture, pharmaceutical compositions containing them and their use as medicaments. The active compounds of the present invention are useful as therapeutics acting peripherally and centrally in the conditions of dysmenorrhea, male or female sexual dysfunction, hypertension, chronic heart failure, inappropriate secretion of vasopressin, liver cirrhosis, nephrotic syndrome, anxiety, depressive disorders, obsessive compulsive disorder, autistic spectrum disorders, schizophrenia, and aggressive behavior.
Metal-Free Oxidative Decarbonylative Coupling of Aliphatic Aldehydes with Azaarenes: Successful Minisci-Type Alkylation of Various Heterocycles
作者:Ren-Jin Tang、Lei Kang、Luo Yang
DOI:10.1002/adsc.201500268
日期:2015.6.15
A metal‐free oxidative decarbonylative coupling of aliphaticaldehydes with various electron‐deficient heterocycles has been developed. This reaction is supposed to be realized via a Minisci‐type mechanism, based on the substrate scope, regioselectivity and radical trapping experiments. The ready availability of aliphaticaldehydes, metal‐free conditions and broad substrate scope should make this method
hydroboration with catecholborane), alkyl iodides (via iodineatom transfer) and xanthates is reported. The reaction proceeds under neutral conditions since no acid is needed to activate the heterocycle and no external oxidant is required. A rateconstant for the addition of a primary radical to N-methoxylepidinium >107 M−1 s−1 was experimentally determined. This rateconstant is more than one order of magnitude
报道了N-甲氧基吡啶鎓盐与由烯烃(通过与儿茶酚硼烷的硼氢化反应)、烷基碘化物(通过碘原子转移)和黄原酸盐产生的烷基自由基的单烷基化反应。反应在中性条件下进行,因为不需要酸来活化杂环,也不需要外部氧化剂。将伯自由基添加到N-甲氧基吡啶鎓的速率常数>10 7 M -1 s -1是通过实验确定的。该速率常数比将伯烷基自由基添加到质子化来比啶所测得的速率常数大一个数量级以上,这表明甲氧基吡啶鎓盐对自由基具有显着的反应性。该反应已用于制备独特的吡啶化萜类化合物,并扩展到富电子烯烃(包括烯醇酯、烯醇醚和烯酰胺)的三组分碳吡啶基化反应。
Oxidase‐Type C−H/C−H Coupling Using an Isoquinoline‐Derived Organic Photocatalyst
作者:Lei Zhang、Björn Pfund、Oliver S. Wenger、Xile Hu
DOI:10.1002/anie.202202649
日期:2022.5.9
An isoquinoline-derived diaryl ketone-type photocatalyst was designed and synthesized. This photocatalyst enabled visible-light-mediated dehydrogenative cross-coupling of heteroarenes with alkanes and aldehydes using air as the sole oxidant. An unconventional mechanism with “self-quenching” to generate an isoquinoline N-radical cation to trigger hydrogen atom transfer (HAT) is involved, according to