Matches in SemOpenAlex for { <https://semopenalex.org/work/W4240765881> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W4240765881 endingPage "418" @default.
- W4240765881 startingPage "418" @default.
- W4240765881 abstract "Abstract We are presently studying pentacovalent phosphorus chemistry for the design and development of new reagents and methods for organic synthesis. We have found that the condensation reactions between aldehydes and 2,2,2-trialkoxy-1,2-oxa-phospholenes, A1b, yield p-hydroxy ketones (aldols) that contain an a-methylene-phosphonate group in good to fair diastereomeric ratios. The syn diastereomer was the major product. This Is contrary to the results published by Ramirez using 2,2,2-trlalkoxy-1,3,2-dioxaphospholenes, A1a, and various carbonyl compounds, where the anti isomer was the major product. Use of 2,2,2-trialkoxy-1,3,2-oxazaphospholenes, A1c, yields a-amino p-hydroxy carbonyl compounds. Application of this carbonyl condensation reaction to the short and efficient syntheses of cis- and trans-neocnidilide will be illustrated. Formation of chlral phosphorus In splrophosphoranes by the arresting of pseudorotation around the phosphorus has been accomplished In 1,3,2-dIoxa-phosphoienes with ephedrine as a bldentate llgand (Bl, 82, 83). The lack of pseudorotation has been demonstrated by variable temperature NMR studies. All of these results will be presented and discussed." @default.
- W4240765881 created "2022-05-12" @default.
- W4240765881 creator A5029115133 @default.
- W4240765881 creator A5043709022 @default.
- W4240765881 creator A5066104521 @default.
- W4240765881 date "1990-01-01" @default.
- W4240765881 modified "2023-09-23" @default.
- W4240765881 title "Use of Pentacovalent Oxaphosphorane Chemistry in the Development of New Methodology for the Synthesis of Natural Products" @default.
- W4240765881 doi "https://doi.org/10.1080/10426509008544463" @default.
- W4240765881 hasPublicationYear "1990" @default.
- W4240765881 type Work @default.
- W4240765881 citedByCount "0" @default.
- W4240765881 crossrefType "journal-article" @default.
- W4240765881 hasAuthorship W4240765881A5029115133 @default.
- W4240765881 hasAuthorship W4240765881A5043709022 @default.
- W4240765881 hasAuthorship W4240765881A5066104521 @default.
- W4240765881 hasConcept C121332964 @default.
- W4240765881 hasConcept C134121241 @default.
- W4240765881 hasConcept C138716334 @default.
- W4240765881 hasConcept C161790260 @default.
- W4240765881 hasConcept C178790620 @default.
- W4240765881 hasConcept C185592680 @default.
- W4240765881 hasConcept C191897082 @default.
- W4240765881 hasConcept C192562407 @default.
- W4240765881 hasConcept C200093464 @default.
- W4240765881 hasConcept C207245611 @default.
- W4240765881 hasConcept C2777454769 @default.
- W4240765881 hasConcept C2777626080 @default.
- W4240765881 hasConcept C2779396153 @default.
- W4240765881 hasConcept C2779413573 @default.
- W4240765881 hasConcept C2780378348 @default.
- W4240765881 hasConcept C35753019 @default.
- W4240765881 hasConcept C40875361 @default.
- W4240765881 hasConcept C510538283 @default.
- W4240765881 hasConcept C71240020 @default.
- W4240765881 hasConcept C97355855 @default.
- W4240765881 hasConceptScore W4240765881C121332964 @default.
- W4240765881 hasConceptScore W4240765881C134121241 @default.
- W4240765881 hasConceptScore W4240765881C138716334 @default.
- W4240765881 hasConceptScore W4240765881C161790260 @default.
- W4240765881 hasConceptScore W4240765881C178790620 @default.
- W4240765881 hasConceptScore W4240765881C185592680 @default.
- W4240765881 hasConceptScore W4240765881C191897082 @default.
- W4240765881 hasConceptScore W4240765881C192562407 @default.
- W4240765881 hasConceptScore W4240765881C200093464 @default.
- W4240765881 hasConceptScore W4240765881C207245611 @default.
- W4240765881 hasConceptScore W4240765881C2777454769 @default.
- W4240765881 hasConceptScore W4240765881C2777626080 @default.
- W4240765881 hasConceptScore W4240765881C2779396153 @default.
- W4240765881 hasConceptScore W4240765881C2779413573 @default.
- W4240765881 hasConceptScore W4240765881C2780378348 @default.
- W4240765881 hasConceptScore W4240765881C35753019 @default.
- W4240765881 hasConceptScore W4240765881C40875361 @default.
- W4240765881 hasConceptScore W4240765881C510538283 @default.
- W4240765881 hasConceptScore W4240765881C71240020 @default.
- W4240765881 hasConceptScore W4240765881C97355855 @default.
- W4240765881 hasIssue "1" @default.
- W4240765881 hasLocation W42407658811 @default.
- W4240765881 hasOpenAccess W4240765881 @default.
- W4240765881 hasPrimaryLocation W42407658811 @default.
- W4240765881 hasRelatedWork W1965959450 @default.
- W4240765881 hasRelatedWork W1972192984 @default.
- W4240765881 hasRelatedWork W2067699421 @default.
- W4240765881 hasRelatedWork W2110021684 @default.
- W4240765881 hasRelatedWork W2126108744 @default.
- W4240765881 hasRelatedWork W2554097823 @default.
- W4240765881 hasRelatedWork W2567003826 @default.
- W4240765881 hasRelatedWork W2765892995 @default.
- W4240765881 hasRelatedWork W2951473598 @default.
- W4240765881 hasRelatedWork W2952089435 @default.
- W4240765881 hasVolume "51" @default.
- W4240765881 isParatext "false" @default.
- W4240765881 isRetracted "false" @default.
- W4240765881 workType "article" @default.