Cyclopentanones. XII. An Alternative Synthesis of Prostaglandins Involving Catalytic Hydrogenation of 2, 3-Dialkyl-4-Dihydroxy-2-Cyclopentenones
摘要:
AbstractA novel approach to Corey's aldehyde is described. A suitable substituted all cis 2, 3‐dialkyl‐l, 4‐cyclopentanediol system is obtained by catalytic reduction of 2, 3‐dialkyl‐4‐hydroxy‐2‐cyclopentenones. Epimerisation to the prostaglandin configuration occurs spontaneously when later on the Horner reaction is carried out.
Cyclopentanones XIV. The synthesis of a prostanoid synthon starting from 3-alkyl-1,2,4-cyclopentanetriones
作者:W. van Brussel、J. van Hooland、P. De Clercq、M. Vandewalle
DOI:10.1002/bscb.19750840803
日期:——
Abstract3‐Alkyl‐1,2,4‐cyclopentanetriones can readily be converted to all trans 2,3‐dialkyl‐1,4‐cyclopentanediols. The latter compounds are intermediates for the synthesis of a prostanoid synthon, known as Corey's lactone, when the alkyl substituents contain appropriate functional groups. The conversion of two different sets of side‐chains to readily distinguishable two‐carbon and one‐carbon aldehyde units is described. Extensive 1H‐NMR data are included.
Cyclopentanones. XVII: Prostaglandin synthesis involving the lithium-liquid ammonia reduction of 3-alkyl-4-hydroxy-2-(1′-octynyl)-2-cyclopentenones
作者:P. De Clercq、M. De Smet、K. Legein、F. Vanhulle、M. Vandewalle
DOI:10.1002/bscb.19760850706
日期:——
AbstractThe present paper describes the lithium‐liquid ammonia reduction of 3‐alkyl‐4‐hydroxy‐2‐(1′‐octynyl)‐2‐cyclopentenones; depending on the nature of the 3‐alkyl side chain prostaglandins of the F1‐series or primary prostaglandins of the 2‐series are synthesised.
Cyclopentanones; XV<sup>1</sup>. Synthesis of 1-Alkyl (or Aryl)-2-hydroxy-3-oxocyclopentenes and of 1-Alkyl (or Aryl)-3,5-dioxocyclopentenes
作者:W. VAN BRUSSEL、M. VANDEWALLE
DOI:10.1055/s-1976-23951
日期:——
Cyclopentanones. XII. An Alternative Synthesis of Prostaglandins Involving Catalytic Hydrogenation of 2, 3-Dialkyl-4-Dihydroxy-2-Cyclopentenones
作者:R. Coen、P. De Clercq、D. van Haver、M. Vandewalle
DOI:10.1002/bscb.19750840311
日期:——
AbstractA novel approach to Corey's aldehyde is described. A suitable substituted all cis 2, 3‐dialkyl‐l, 4‐cyclopentanediol system is obtained by catalytic reduction of 2, 3‐dialkyl‐4‐hydroxy‐2‐cyclopentenones. Epimerisation to the prostaglandin configuration occurs spontaneously when later on the Horner reaction is carried out.