Polysubstituted indoles are prevalent in pharmaceuticals, agrochemicals, and organic materials. Presented herein is the fact that polyfunctionalized indoles can be efficiently constructed from easily accessible oxime esters and aryl iodides, involving a palladium/norbornene synergistic synthesis. The reaction is enabled by a unique class of electrophiles in palladium/norbornene cooperative catalysis
CH/NOfunctionalizations by cobalt(III) catalysis allowed the expedient synthesis of a broad range of isoquinolines. Thus, internal and challenging terminal alkynes proved to be viable substrates for an isohypsic annulation, which was shown to proceed by a facile CH cobaltation.
Ç H /Ñ ö官能化由钴(III)催化使范围广泛的异喹啉的的适宜的合成。因此,内部和具有挑战性的末端炔烃被证明是一个isohypsic环,其通过示出一个浅显下进行可行的基板 ħcobaltation。
Rhodium-Catalyzed Enantioselective Hydrogenation of Oxime Acetates
Isoquinoline synthesis by C-H activation/annulation using vinyl acetate as an acetylene equivalent
作者:Nicola J. Webb、Steven A. Raw、Stephen P. Marsden
DOI:10.1016/j.tet.2018.05.063
日期:2018.9
Vinyl acetate is used as an acetylene equivalent in rhodium(III)-catalysed C-H activation/annulation with aryl ketoxime esters. Extension to an aldoxime ester allows for a concise formal synthesis of decumbenine B.
Modular Pyridine Synthesis from Oximes and Enals through Synergistic Copper/Iminium Catalysis
作者:Ye Wei、Naohiko Yoshikai
DOI:10.1021/ja312346s
日期:2013.3.13
ketoximes and α,β-unsaturated aldehydes that is synergistically catalyzed by a copper(I) salt and a secondary ammonium salt (or amine). This redox-neutral reaction allows modular synthesis of a variety of substituted pyridines under mild conditions with tolerance of a broad range of functional groups. The reaction is driven by a merger of iminium catalysis and redox activity of the copper catalyst, which
我们在此描述了由铜(I)盐和仲铵盐(或胺)协同催化的 O-乙酰基酮肟和 α,β-不饱和醛的 [3+3] 型缩合反应。这种氧化还原中性反应允许在温和条件下模块化合成各种取代的吡啶,并具有广泛的官能团耐受性。该反应由亚胺催化和铜催化剂的氧化还原活性的结合驱动,最初会还原肟 NO 键以生成亲核铜 (II) 烯酰胺,然后将二氢吡啶中间体氧化为吡啶产物。