Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Leonard C. Leitch"'
Publikováno v:
Canadian journal of research. 25(1)
The syntheses of 2-sulphanilamido-4-hydroxypyrimidine, 2-sulphanilamido-4,6-dihydroxypyrimidine, and several other sulphanilamidopyrimidines are described. An improved method for the preparation of sulphaguanidine is given.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd7e48eaaaf19f2402ff3091829b5957
https://pubmed.ncbi.nlm.nih.gov/20285013
https://pubmed.ncbi.nlm.nih.gov/20285013
Publikováno v:
Journal of Heterocyclic Chemistry. 28:411-416
Some alkyl-, alkenyl-, acyl- and nitrogen- derivatives of α-terthienyl 1 have been synthesized in an effort to expand the potential insecticidal activity profile of this compound. The introduction of substituents was carried out directly on the α-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77362315feabf12e436705414ecdce63
https://doi.org/10.1002/jhet.5570280239
https://doi.org/10.1002/jhet.5570280239
Publikováno v:
Tetrahedron. 44:2403-2412
A number of derivatives of α-terthienyl were prepared including a series of naturally occurring compounds. A description of the syntheses of some new compounds, including 5-iodo, 5,5'-diiodo, 5,5'-diformyl, 5.5'-di- tert butyl, 5,- tert -butyl, 5- t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76700dffe06cdd114a44b4752e4d5c98
https://doi.org/10.1016/s0040-4020(01)81692-6
https://doi.org/10.1016/s0040-4020(01)81692-6
Publikováno v:
Canadian Journal of Biochemistry. 58:986-995
Anesthetics bound to model membranes were observed directly by means of deuterium nuclear magnetic resonance (NMR). The specifically deuterated local anesthetics procaine and tetracaine were synthesized, and their partition coefficients (water:phosph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::019d113a2af9703f24214f8793dc8b15
https://doi.org/10.1139/o80-134
https://doi.org/10.1139/o80-134
Publikováno v:
Canadian Journal of Research. :139-157
A number of attempts to prepare sulphanilylthiourea are described. The synthesis was accomplished by reacting acetylsulphanilylcyanamide with hydrogen sulphide under pressure and at elevated temperatures to form acetylsulphanilylthiourea, which was d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65abde7c02873e9808ce1166a7584c97
https://doi.org/10.1139/cjr45b-018
https://doi.org/10.1139/cjr45b-018
Publikováno v:
Canadian Journal of Research. :256-263
An improved method of preparing polymethylene, (CH2)n, by the decomposition of diazomethane is described. A new polymer, polyethylidene, (CH3∙CH)n, has been obtained from diazoethane by the same reaction. Diazomethane-d2 is reported for the first t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb7167b99ca2975db27d7c3ff5405d0e
https://doi.org/10.1139/cjr50b-033
https://doi.org/10.1139/cjr50b-033
Autor:
Leonard C. Leitch
Publikováno v:
Canadian Journal of Chemistry. 33:400-404
The mechanism of the Nef reaction was investigated with nitroethane-1,1-d2. The isolation of 95 mole % ethanal-1-d in 70% yield renders a mechanism proposed by Mahler untenable, but supports others submitted by van Tamelen and Thiede and by Nametkin.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21aa2aeec869f538a9c62352e6a9f510
https://doi.org/10.1139/v55-047
https://doi.org/10.1139/v55-047
Publikováno v:
Canadian Journal of Research. :1-5
The synthesis of δ-3 (indolyl) -valeric acid, by a procedure analogous to that employed in the synthesis of its lower homologues, is described. It, as well as a bz-methyl derivative of β-3(indolyl)-propionic acid, which has also been synthesized, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2da600f84f4c0744b5f3d45a2cfe87d
https://doi.org/10.1139/cjr36b-001
https://doi.org/10.1139/cjr36b-001
Autor:
J. Kaminski, John T. Arnason, C. W. Berg, Jørgen Lam, Peter Morand, Leonard C. Leitch, A. MacEachern, Bernard J. R. Philogène
Publikováno v:
Phytochemistry. 25:1609-1611
Naturally occurring and synthetic analogues and derivatives of polyacetylenes and thiophenes of the Asteraceae were investigated for their phototoxic effects on mosquito larvae, iodination, dimethylation in the 3′,4′-position or substitution of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8c3961ebd49ec1c8434c9407f50685b
https://doi.org/10.1016/s0031-9422(00)81218-2
https://doi.org/10.1016/s0031-9422(00)81218-2
Autor:
C. W. Berg, R. G. Taylor, J. T. Arnason, Bernard J. R. Philogène, F. Duval, Leonard C. Leitch, Peter Morand, D. Champagne
Publikováno v:
Journal of economic entomology. 78(1)
New methods to synthesize alpha-terthienyl ( α-T ) on a large scale have permitted field and laboratory evaluation of this naturally occurring phototoxin from plants for blackfly and mosquito control. The acute toxicity of α-T to blackfly larvae (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1dfdba262d4fb2002501e2772a8c4065
https://pubmed.ncbi.nlm.nih.gov/3973205
https://pubmed.ncbi.nlm.nih.gov/3973205