Boron-Containing Enamine and Enamide Linchpins in the Synthesis of Nitrogen Heterocycles
作者:Jeffrey D. St. Denis、Adam Zajdlik、Joanne Tan、Piera Trinchera、C. Frank Lee、Zhi He、Shinya Adachi、Andrei K. Yudin
DOI:10.1021/ja510963k
日期:2014.12.17
access to the corresponding α-halo aldehydes, which undergo regioselective annulation to form borylated thiazoles. A condensation/amidationsequence converts α-boryl aldehydes into stable α-boryl enamides without concomitant C → N migration. We also show that palladium-catalyzed cyclization of α-boryl enamides leads to synthetically versatile isoindolones. These molecules can be subsequently used to access
已经证明了 α-硼烯胺和烯酰胺在氮杂环合成中的使用。硼烯胺可以很容易地获得相应的 α-卤代醛,这些醛经过区域选择性环化形成硼化噻唑。缩合/酰胺化序列将 α-硼醛转化为稳定的 α-硼烯酰胺,而不会伴随 C → N 迁移。我们还表明,钯催化的 α-硼烯酰胺环化导致合成通用的异吲哚酮。这些分子随后可用于访问多环支架。
Rh
<sup>III</sup>
‐Catalyzed C−H Activation of Aryl Hydroxamates for the Synthesis of Isoindolinones
RhIII‐catalyzedC−H functionalization reaction yielding isoindolinones from arylhydroxamates and ortho‐substituted styrenes is reported. The reaction proceeds smoothly under mild conditions at room temperature, and tolerates a range of functional groups. Experimental and computational investigations support that the high regioselectivity observed for these substrates results from the presence of an
Electroreductive Intramolecular Coupling of Phthalimides with Aromatic Aldehydes: Application to the Synthesis of Lennoxamine
作者:Naoki Kise、Shinsaku Isemoto、Toshihiko Sakurai
DOI:10.1021/jo2018735
日期:2011.12.2
The electroreductive intramolecular coupling of phthalimides with aromatic aldehydes in the presence of chlorotrimethylsilane and triethylamine led to five-, six-, and seven-membered cyclized products (58–84%). The electroreductive cyclization was applied to the total synthesis of lennoxamine.
Tetracyclic condensed heterocyclic compounds for the treatment of senile dementia
申请人:TAKEDA CHEMICAL INDUSTRIES, LTD.
公开号:EP0655451A1
公开(公告)日:1995-05-31
A novel compound of the formula
wherein Ar represents a tetracyclic fused heterocyclic group which may be substituted; R¹ represents H or a hydrocarbon group which may be substituted; Y represents an amino or nitrogen-containing saturated heterocyclic group which may be substituted, its salt, inhibiting excellent cholinesterase inhibitory activity and monoamine uptake inhibitory activity, thus being useful as therapeutic and/or prophylactic medicaments of senile dementia.
一种新颖的式化合物
其中 Ar 代表可被取代的四环融合杂环基团;R¹ 代表 H 或可被取代的烃基团;Y 代表可被取代的氨基或含氮饱和杂环基团,其盐具有优异的胆碱酯酶抑制活性和单胺摄取抑制活性,因此可用作老年痴呆症的治疗和/或预防药物。