A novel palladium-catalyzed decarboxylative cascade cyclization for the assembly of diverse fused heteropolycycles by employing α-oxocarboxylic acids as three-carbon insertion units is reported. This protocol enables the synthesis of isoquinolinedione- and indolo[2,1-a]isoquinolinone-fused benzocycloheptanones in moderate to good yields by the use of different aryl iodides, including alkene-tethered
报道了一种新颖的钯催化脱羧级联环化反应,该反应通过使用α-氧代羧酸作为三碳插入单元来组装各种稠合的杂多环。该方案可通过使用不同的芳基碘化物(包括烯烃系的2-碘代苯甲酰胺和2-(2-碘代苯基)-)以中等到良好的产率合成异喹啉二酮和吲哚并[2,1 - a ]异喹啉酮稠合的苯并环庚酮1 H-吲哚。值得注意的是,该方法通过依次进行分子内碳氢合,CH活化和脱羧,实现了六元环和七元环的同时构建。
Copper-Catalyzed Cross-Coupling Interrupted by an Opportunistic Smiles Rearrangement: An Efficient Domino Approach to Dibenzoxazepinones
作者:Matthew O. Kitching、Timothy E. Hurst、Victor Snieckus
DOI:10.1002/anie.201106786
日期:2012.3.19
Unexpected Smiles! An unusual and highly regioselective synthesis of dibenzoxazepinones by a domino sequence assisted by an unexpected Smiles rearrangement is reported. The process is effective on electronically differentiated phenols and shows a high tolerance to variation in the benzamide substituents. A plausible path for the reaction, supported by preliminary mechanistic data, is offered.
The stereochemistry around the N‐benzoylated indole moiety of indometacin was studied by restricting the rotation about the NC7′ and/or C7′C1′ bond. In the 2′,6′‐disubstituted ones, an atropisomericproperty was found and the atropoisomers were separated and isolated as stable forms. Their biological abilities to inhibit cyclooxygenase‐1 (COX‐1) and cyclooxygenase‐2 (COX‐2) were examined. Only the
Heterocyclic entities that modulate PI3 kinase activity, pharmaceutical compositions containing the isoquinolone entities, and methods of using these chemical entities for treating diseases and conditions associated with P13 kinase activity are described herein.
Palladium(II)-Catalyzed Intramolecular Diamination of Alkynes under Aerobic Oxidative Conditions: Catalytic Turnover of an Iodide Ion
作者:Bo Yao、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201201640
日期:2012.5.21
“I” did it: A sequential intramolecular amination/N‐demethylation/amidation of internal acetylenes in the presence of a catalytic amount of Pd(OAc)2 and nBu4NI afforded indolo[3,2‐c]isoquinolinones under mild aerobic conditions (see scheme, DMSO=dimethyl sulfoxide). The iodide ion was regenerated by reaction of in situ generated MeI with HOAc present in the reaction mixture.
“我”做到了:在催化量的Pd(OAc)2和n Bu 4 NI存在下,通过顺序进行分子内胺化/ N-去甲基化/内部乙炔酰胺化,在轻度需氧条件下提供了吲哚[3,2- c ]异喹啉酮条件(参见方案,DMSO =二甲基亚砜)。通过原位生成的MeI与反应混合物中存在的HOAc反应,可再生碘离子。