A Merged Aldol Condensation, Alkene Isomerization, Cycloaddition/Cycloreversion Sequence Employing Oxazinone Intermediates for the Synthesis of Substituted Pyridines
作者:Jonathan Scheerer、Jill Williamson、Emily Smith
DOI:10.1055/s-0036-1588729
日期:2017.6
A domino reaction sequence has been evaluated that begins with union of novel dihydrooxazinone precursors with 2-alkynyl-substituted benzaldehyde components through aldol condensation. Ensuing operations, including alkene isomerization, Diels–Alder, and retrograde Diels–Alder with loss of CO2 occurs in the same reaction vessel to provide polysubstituted tricyclic pyridine products.
已经评估了多米诺骨牌反应顺序,该反应顺序从新型二氢恶嗪酮前体与 2-炔基取代的苯甲醛组分通过醇醛缩合结合开始。随后的操作,包括烯烃异构化、Diels-Alder 和损失 CO 2的逆行 Diels-Alder发生在同一反应容器中,以提供多取代的三环吡啶产物。
Synthesis and Spectrophotometric Analysis of 1-Azafluorenone Derivatives
作者:Nicholas H. Angello、Robert E. Wiley、Christopher J. Abelt、Jonathan R. Scheerer
DOI:10.3390/molecules25153358
日期:——
construction of diverse 1-azafluorene derivatives featuring a Diels–Alder/retro-Diels–Alder cycloaddition is reported. Conditions were also determined for oxidation to the derived azafluorenones. The spectrophotometric analysis of five different azafluorenones were performed. Moderate fluorescence was observed with azafluorenone derivatives that bear an imbedded pyridone motif; whereas those bearing substituted