Iron-catalysed 1,2-acyl migration of tertiary α-azido ketones and 2-azido-1,3-dicarbonyl compounds
作者:Tonghao Yang、Yajun Lin、Chaoqun Yang、Wei Yu
DOI:10.1039/c9gc02085c
日期:——
Iron-catalysed 1,2-acyl migration of tertiary α-azido ketones and 2-azido-1,3-dicarbonyl compounds provides a simple and atom-economical approach toward enamides and isoquinolones. This paper reports two catalyst systems for these transformations which employ iron(II) complexes [Fe(dpbz)]Br2 (dpbz = 1,2-bis(diphenylphosphino)benzene) and FeBr2/Et3N, respectively. [Fe(dpbz)]Br2 was found to be highly
铁催化的α-叠氮基酮和2-叠氮基-1,3-二羰基化合物的1,2-酰基迁移为酰胺和异喹啉酮提供了一种简单且原子经济的方法。本文报道两种催化剂体系用于这些转化其采用铁(II)配合物的[Fe(dpbz)]溴2(dpbz = 1,2-双(二苯基膦基)苯)和FeBr 2 / ET 3 N,分别。发现[Fe(dpbz)] Br 2在将2-叠氮基-2,3-二氢-1 H-茚满-1-酮转化为异喹诺酮方面非常有效。另一方面,由于Et 3的有益作用,FeBr 2 / Et 3 N的试剂组合具有更宽的催化范围N.后一种催化剂体系可使2-叠氮基-2-甲基-1,3-二羰基化合物在温和条件下以良好的收率转化为相应的酰胺。
Rhodium(III)-Catalyzed Annulative Carbooxygenation of 1,1-Disubstituted Alkenes Triggered by C−H Activation
A Cp*RhIII‐catalyzed annulative carbooxygenation of challenging 1,1‐disubstituted alkenes triggered by C−Hactivation of N‐aryloxyacetamides has been established, which affords 2,3‐dihydrobenzofuran derivatives with a quaternary carbon center in good to excellent yields under mild redox‐neutral conditions. An amide group on the alkenes is essential for the process, and may inhibit the β‐H elimination
已经建立了Cp * Rh III催化的N-芳氧基乙酰胺的CH活化触发的具有挑战性的1,1-二取代烯烃的环状碳氧加合反应,该化合物可以在良好的收率下,以良好的收率提供具有季碳中心的2,3-二氢苯并呋喃衍生物。轻度氧化还原中性条件。烯烃上的酰胺基对于该过程至关重要,并且可能通过配位使铑中心饱和而抑制C(sp3-)-Rh物种中β-H的消除。此外,从控制实验中获得的机械学见解表明,涉及一种Rh III -Rh V -Rh III催化循环的机理。
Asymmetric transfer hydrogenation of α,β-unsaturated, α-tosyloxy and α-substituted ketones
作者:Philip Peach、David J. Cross、Jennifer A. Kenny、Inderjit Mann、Ian Houson、Lynne Campbell、Tim Walsgrove、Martin Wills
DOI:10.1016/j.tet.2005.11.036
日期:2006.2
Asymmetric transferhydrogenation of cyclic and acyclic α,β-unsaturatedketones catalysed by η6-p-cymene/ruthenium(II) and η5-pentamethylcyclopentadienyl/rhodium(III) complexes have been investigated. Cyclicα,β-unsaturatedketones appeared to be more suitable substrates for the synthesis of enantiomerically pure allylic alcohols than do acyclic α,β-unsaturatedketones. A proposed mechanism for the
环状和无环α的不对称转移氢化,β不饱和酮由η催化6 - p -cymene /钌(II)和η 5 -五甲基/铑(III)络合物进行了研究。环状α,β-不饱和酮似乎比无环α,β-不饱和酮更适合用于合成对映体纯的烯丙基醇。讨论了一种由α-甲苯磺酰氧基和卤素取代的苯乙酮形成4-苯基-[1,3]-二氧戊环-2-酮的机理。提出了进一步研究减少α-甲苯磺酰氧基苯乙酮范围和α-取代酮的动态动力学拆分的结果。
PROCESSES FOR THE PREPARATION OF PESTICIDAL COMPOUNDS
申请人:Dow AgroSciences LLC
公开号:US20150112078A1
公开(公告)日:2015-04-23
The present application provides processes for making pesticidal compounds and compounds useful both as pesticides and in the making of pesticidal compounds.
本申请提供了用于制造杀虫化合物的过程,以及既可用作杀虫剂又可用于制造杀虫化合物的化合物。
Asymmetric Reduction of Cyclic Enones to Allylic Alcohols
作者:Jérôme Hannedouche、Jennifer A. Kenny、Tim Walsgrove、Martin Wills
DOI:10.1055/s-2002-19747
日期:——
Asymmetric transfer hydrogenation of cyclic enones results in highly enantioselective reduction to cyclic allylic alcohols.