Zobrazeno 1 - 10
of 115
pro vyhledávání: '"J.B. Stothers"'
Publikováno v:
Canadian Journal of Chemistry. 63:2401-2405
The photocycloaddition of allene to the steroidal enone 1a, normally occurring from the (less hindered) α side, has been directed in part to the (more hindered) β side by adsorption on the surface of silica gel. For a series of cyclic enone–allen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acc78f5e2652ecbe4c69003a47642710
https://doi.org/10.1139/v85-397
https://doi.org/10.1139/v85-397
Publikováno v:
Phytochemistry. 15:855-872
The sesquiterpenes isolated from species of the Solanaceae under various conditions of stress are reviewed, with brief references to other solanaceous stress metabolites. The chemistry and selected physical properties of the sesquiterpenoidal compoun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2836a1bb1a4eedfaa830dafed27ba991
https://doi.org/10.1016/s0031-9422(00)84361-7
https://doi.org/10.1016/s0031-9422(00)84361-7
Publikováno v:
Tetrahedron Letters. 22:509-512
Absorption spectroscopy of nitrites esters and carbonyl functions, and 13C chemical shifts of the carbonyl carbon, in substituted dodecanoate micelles appear to indicate the presence of a polar environment in the neighbourhood of the substituent.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46b66524ae3e3a14cd134b1c28123711
https://doi.org/10.1016/s0040-4039(01)90141-8
https://doi.org/10.1016/s0040-4039(01)90141-8
Publikováno v:
Tetrahedron. 38:977-989
Pyrolysis of syn -2-adamantyl-4-d 1 methane-sulphonate 8 in a silanised pyrex reactor leads to protoadamantene with about 0.25 atoms 2 H at each of C-2, -7 and -9 and little labelling elsewhere according to 2 H and 13 C NMR. This indicates complete e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b94d5223a2dc4d7f404008ad30aa322d
https://doi.org/10.1016/0040-4020(82)85076-x
https://doi.org/10.1016/0040-4020(82)85076-x
Publikováno v:
Tetrahedron Letters. 23:4465-4468
13Cmr spectra show complete absence of scrambling of an 18O label in 1 a recovered after partial conversion to 2 a thereby precluding an 0 -methylation mechanism for the bimolecular formation of 2 a from 1 a .
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d050f3a4eb02e479ad94f0fede759f6
https://doi.org/10.1016/s0040-4039(00)85629-4
https://doi.org/10.1016/s0040-4039(00)85629-4
Autor:
A. Stoessl, J.B. Stothers
Publikováno v:
Canadian Journal of Chemistry. 53:3359-3364
The reaction of 2-furfurylidene-10-methyl-trans-1-decalone with base (NaOH – aqueous HOCH2CH2OH) has been reinvestigated and found to give nine products. Elucidation of the structures of eight of these products, which accounted for ca. 80% of the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6ebc778203351e0bf1a0bc59158398c
https://doi.org/10.1139/v75-479
https://doi.org/10.1139/v75-479
Publikováno v:
Tetrahedron. 20:913-928
An intercomparison of the NMR data for the methyl protons in a series of thirty-seven alkaloids of the Veratrum group provides additional support for previous proposals regarding the β-configuration of the C-27 methyl group in all of these compounds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c7e0f14874918297a1cc9b9e2a7ab91
https://doi.org/10.1016/s0040-4020(01)98426-1
https://doi.org/10.1016/s0040-4020(01)98426-1
Publikováno v:
Canadian Journal of Chemistry. 50:612-617
The structure of the dimer formed from acetonylacetone and hydrazine has been re-examined. On the basis of chemical and spectroscopic data, a covalent tricyclic structure is proposed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f03770a669a38ec4ffee9b1f933449fd
https://doi.org/10.1139/v72-096
https://doi.org/10.1139/v72-096
Publikováno v:
Canadian Journal of Chemistry. 39:488-497
The irradiation of dialkyl ketones in cyclohexene leads to the formation of cyclohexenyl-dialkylcarbinols. The use of aldehydes leads to the formation of the corresponding secondary alcohols, but the reaction is more complex because of concomitant Kh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::139d12a7beb08c1ae31437136a9f56b4
https://doi.org/10.1139/v61-058
https://doi.org/10.1139/v61-058
Publikováno v:
Tetrahedron. 21:1417-1432
The mixture of ergot pigments from a Portuguese ergot drug has been separated. Aside from ergoflavin five other pigments have been characterized and structural proposals for four of these made.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abd5af9c2fa7da90285101f99d15b64e
https://doi.org/10.1016/s0040-4020(01)98303-6
https://doi.org/10.1016/s0040-4020(01)98303-6