Zobrazeno 1 - 10 of 12 pro vyhledávání: '"David J. Humphreys"'
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Steroid analogues. Part 4. Synthesis of Δ9-6,7-dinor-5,8-seco-steroids viaβ-lactones
Autor: Christopher Earle Newall, David J. Humphreys
Publikováno v: J. Chem. Soc., Perkin Trans. 1. :33-45
The condensation of cycloalkanones with cycloalkanecarboxylic acids has been shown to be a general method for the preparation of cycloalkylidenecycloalkanes bearing different functional groups in the two halves of the molecule.Condensation of bicycli
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::83e189af1409bf302080dd9e324534b4
https://doi.org/10.1039/p19780000033
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4
Steroid analogues. Part 5. Synthesis of Δ9-6,7-dinor-5,8-seco-steroids viaΔ3-1,3,4-thiadiazolines
Autor: Gerald A. Smith, Christopher Earle Newall, David J. Humphreys, Gordon Hanley Phillipps
Publikováno v: J. Chem. Soc., Perkin Trans. 1. :45-64
A general synthesis of symmetrical bi(cycloalkylidene)s is reported, involving successive reaction of an azine with hydrogen sulphide to give a 1,3,4-thiadiazolidine, oxidation to a Δ3-1,3,4-thiadiazoline, pyrolysis to a thiiran, and desulphurisatio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e4bd50f344f6c3f3f4e2b78d4f5d2cf4
https://doi.org/10.1039/p19780000045
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8
Structure and distribution of a neurotoxic principle, hemerocallin
Autor: Richard M. Barlow, David J. Humphreys, J.Barry Lee, George B.J. Stodulski, Deborah J. Middleton, Jianhua Wang
Publikováno v: Phytochemistry. 28:1825-1826
Hemerocallin, the neurotoxic principle found in Hemerocallis species, is the same as stypandrol isolated from Stypandra imbricata and Dianella revoluta, and the structure ascribed to hemerocallin is incorrect.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::92a6105c8d1f35003a4311d9cea72174
https://doi.org/10.1016/s0031-9422(00)97867-1
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9
Steroid analogues. Part 2. Synthesis of unsymmetrical bi(cycloalkylidene)s via vic-dinitro-compounds
Autor: Pamela M. Lawrence, Christopher Earle Newall, David J. Humphreys
Publikováno v: Journal of the Chemical Society, Perkin Transactions 1. :19
The light-catalysed reaction of 4,4-dinitrocyclohexanol (6) with the lithium salts of 4-substituted 1-nitrocyclohexanes [4-OBz (4), 4-CH2CO2Me (12), 4-CH2COMe (15), and 4-H (11)] gave 4′-substituted 4-hydroxy-1,1′-dinitro-1,1′-bicyclohexyls (16
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3943cfcac71ea693039d0dd9422405ee
https://doi.org/10.1039/p19780000019
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10
Steroid analogues. Part 3. Preparation of 4-cyclohexylidenecyclohex-2-enones and 6,7-dinor-5,8-secoestra-4,9-dien-3-ones by Birch reduction of 1-p-methoxyphenylcycloalkanols
Autor: Gordon Hanley Phillipps, Pamela M. Lawrence, Christopher Earle Newall, David J. Humphreys, Peter A. Wall
Publikováno v: Journal of the Chemical Society, Perkin Transactions 1. :24
Reduction of 4-substituted 1-(p-methoxyphenyl)cyclohexanols (8)–(13) with lithium and ethanol in liquid ammonia, followed by hydrolysis, gave 4-(4-substituted cyclohexylidene)cyclohex-2-enones (14)–(22) as the major products; in some cases the co
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12be23e409592870637b9e5acbc35b0e
https://doi.org/10.1039/p19780000024
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