N -BOC -2-甲基苯乙胺(6)的锂化仅发生在甲基上,而苯丙基同类物(11)的锂化具有较低的区域选择性。N -BOC-苯基丙胺(17)在苄基位置上被有效地锂化,而N -BOC-2-甲基苯基丁胺(23)经历甲基的锂化但转化率低。从杂原子定向金属化的一般角度讨论了结果。几种硫代衍生物可以转化为杂环,例如四氢-3-苯并ze庚因-2-酮(10),六氢-3-苯并偶氮星-2-酮(16)和3-苯基吡咯烷酮(19-22)。
[EN] DIHYDROQUINOLIZINONES AS ANTIVIRALS<br/>[FR] DIHYDROQUINOLIZINONES À UTILISER EN TANT QU'ANTIVIRAUX
申请人:GLAXOSMITHKLINE IP DEV LTD
公开号:WO2018154466A1
公开(公告)日:2018-08-30
Compounds, specifically hepatitis B virus and/or hepatitis D virus inhibitors, more specifically compounds that inhibit HBe antigen and HBs antigen in a subject, for the treatment of viral infections, and methods of preparing and using such compounds. Formula (I):
Nickel/Photoredox Dual Catalytic Cross-Coupling of Alkyl and Amidyl Radicals to Construct C(sp<sup>3</sup>)–N Bonds
作者:Shaofang Zhou、Kang Lv、Rui Fu、Changlei Zhu、Xiaoguang Bao
DOI:10.1021/acscatal.1c00731
日期:2021.5.7
The construction of C(sp3)–N bonds via direct radical–radical cross-coupling under benign conditions is a desirable but challenging approach. Herein, the cross-coupling of alkyl and amidyl radicals to build aliphatic C–N bonds in a concise, mild, and oxidant-free manner is implemented by nickel/photoredox dual catalysis. In this protocol, the single electron transfer strategy is successfully employed
在良性条件下通过直接自由基-自由基交叉偶联来构建C(sp 3)-N键是一种理想但具有挑战性的方法。在此,通过镍/光氧化还原双重催化,以简明,温和且无氧化剂的方式将烷基和and基自由基交叉偶联以建立脂族C–N键。在该协议中,成功地采用了单电子转移策略,分别从磺酰基叠氮化物/叠氮基甲酸酯和烷基三氟硼酸酯生成N-和C-中心的自由基。然而,光催化剂诱导的三重态-三重态能量转移机制可能不适用于该反应。激发的光催化剂(Ru II / * Ru II / Ru III / Ru II的氧化猝灭途径))结合可能的Ni I / Ni II / Ni III / Ni I催化循环,基于协同实验和计算研究,提出了镍/光氧化还原双催化C(sp 3)–N键形成的方法。
Preparation, characterization and application of succinimidinium hydrogensulfate ([H-Suc]HSO<sub>4</sub>) as an efficient ionic liquid catalyst for the N-Boc protection of amines
Succinimidinium hydrogensulfate ([H-Suc]HSO4), which is prepared from the reaction of succinimide and sulfuric acid, showed excellent catalytic activity for theN-Boc protection of various amines under solvent free conditions.
Regioselective Rhodium(I)-Catalyzed Hydroarylation of Protected Allylic Amines with Arylboronic Acids
作者:Gavin Chit Tsui、Frederic Menard、Mark Lautens
DOI:10.1021/ol100974f
日期:2010.6.4
A novel regioselective rhodium(I)-catalyzed hydroarylation of unactivated alkenes with arylboronicacids is described. The catalytic system employs [Rh(COD)OH]2 and BINAP to effect the addition of various arylboronicacids to protected allylic amines. The regioselectivity was found to be highly dependent on the protecting group, favoring the linear addition product with up to 92% yield and >20:1 regioselectivity
One step direct conversion of azides and benzyl carbamates to t-butyl carbamates is achieved using inexpensive and safe hydride source namely polymethylhydrosiloxane (PMHS) under Pd-C catalysis.