Phosphonium salts and phosphoranes. Part 5. Thermal and electron-impact induced fragmentation of heteroaroylmethylenetriphenylphosphoranes.
作者:Judith M. Brittain、R.Alan Jones、Sayed Ali Naghi Taheri
DOI:10.1016/s0040-4020(01)90373-4
日期:1992.9
synthesis of five-membered heteroarylethynes. The electron-impact induced fragmentation of the phosphoranes also produced ions corresponding in mass to the ethynes, but metastable ion data indicate that the extrusion of the ethyne follows the initial loss of H· from the molecularion.
New Three-Component Glyoxylation-Decarbonylative Stille Coupling Sequence to Acyl Heterocycles under Mild Conditions
作者:Thomas Müller、Boris Tasch、Eugen Merkul、Walter Frank
DOI:10.1055/s-0029-1218802
日期:2010.7
A consecutive sequence of glyoxylation of 1-methyl-1H-indole, 1-(4-methoxybenzyl)-1H-pyrrolo[2,3-b]pyridine or N-substituted pyrroles with oxalyl chloride and subsequent decarbonylative Stille coupling under very mild, Lewis acid free conditions using all reactants in equimolar quantities is reported. As an illustration, this glyoxylation-decarbonylative couplingsequence was elaborated into a consecutive
1-甲基-1 H-吲哚,1-(4-甲氧基苄基)-1 H-吡咯并[2,3- b ]吡啶或N-取代的吡咯与草酰氯的乙氧基化连续序列,随后在非常低的温度下进行脱羰Stille偶联报道了使用所有等摩尔量反应物的温和,无路易斯酸条件。作为说明,该乙氧基化-脱羰基偶联序列被精加工为1-甲基-3-(1-甲基-4,5-二氢-1 H-吡唑-3-基)-1 H的连续四组分合成-吲哚 乙醛酸化-脱羰基Stille反应-多组分反应-CC偶联-酰基杂环
10.1021/acs.orglett.4c02576
作者:Wang, Tian、Zhang, Zengyu、Gao, Fan、Yan, Xiaoyu
DOI:10.1021/acs.orglett.4c02576
日期:——
Ketones, as essential functional group skeletons, have garnered significant interest due to their diverse transformations. Herein, we describe a versatile photoredox catalyzed deacylation-aroylation strategy that enables the direct transformation of alkyl ketones to aryl ketones. This process involves photoredox deacylation of dihydroquinazolinones derived from alkyl ketones to generate alkyl radicals