Zobrazeno 1 - 10
of 164
pro vyhledávání: '"LeRoy H. Klemm"'
Publikováno v:
Journal of Heterocyclic Chemistry. 26:1519-1522
Reaction of 6-chloro-9H-(2-tetrahydropyranyl)purine (2d) with the sodium salt of ethyl benzothiazole-2-ace-tate (1) in dimethylformamide effects condensation of the two compounds (with loss of sodium chloride) to give the corresponding ethyl diarylac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8293cd99b268630c34a479bee590bf0
https://doi.org/10.1002/jhet.5570260602
https://doi.org/10.1002/jhet.5570260602
Autor:
Scott M. Reed, LeRoy H. Klemm
Publikováno v:
Journal of Heterocyclic Chemistry. 38:1433-1439
A 1:1 geometrically oriented encounter complex between thieno[2,3-b]pyridine (1) and 4-nitrophenyldia-zoacetate (2) is proposed to account for the dominant formation (ca. 64%) of the 2-isomer in the mixture of 4-nitrophenyl-l isomers obtained previou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9433e74899aeff414cc1f3365151de87
https://doi.org/10.1002/jhet.5570380628
https://doi.org/10.1002/jhet.5570380628
Publikováno v:
Journal of Heterocyclic Chemistry. 38:189-192
From the crude mixtures of isomeric 4-nitrophenylthieno[2,3-b]pyridines (3) previously reported [1] were isolated three analytically pure samples, viz. the 2-isomer (yellow needles, mp 258°, 3a), the 6-isomer (red prisms, mp 182°, 3e), and a ternar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8549c79e51e6279802a0b5286c9cf3e
https://doi.org/10.1002/jhet.5570380128
https://doi.org/10.1002/jhet.5570380128
Autor:
LeRoy H. Klemm, Kristi Miller
Publikováno v:
Journal of Heterocyclic Chemistry. 38:185-188
Thieno[2,3-b]pyridine (1) was warmed at 45 ± 7° with diazotized 4-nitroaniline (2) (molar ratio 1:2 = 3.6:1) in buffered (sodium acetate-acetic acid) aqueous solution until gas evolution ceased. The reaction mixture was separated into these fractio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7683cc2ed17cec893a1aa105eab9fbcd
https://doi.org/10.1002/jhet.5570380127
https://doi.org/10.1002/jhet.5570380127
Autor:
LeRoy H. Klemm, Timothy J. R. Weakley
Publikováno v:
Canadian Journal of Chemistry. 78:1647-1650
Photochemical reductive dimerization of 3,3'-dimethoxybenzophenone (1b) gave the symmetrical benzopinacol 1,1,2,2-tetrakis(3-methoxyphenyl)ethane-1,2-diol (2b), which was rearranged to the benzopinacolone 1,2,2,2-tetrakis(3-methoxyphenyl)ethanone (3b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff3aa71ca56436204bbe79eb2b8c5b57
https://doi.org/10.1139/v00-147
https://doi.org/10.1139/v00-147
Publikováno v:
Journal of Heterocyclic Chemistry. 37:763-766
X-ray crystallographic studies of thieno[2,3-b:4,5-b′]dipyridine (1) and its monohydroperchlorate salt (1a) show that 1 is protonated at N1 in ring A and not at N6 in ring C. In each compound individual rings are planar, but there is a small dihedr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::289523bfe63bb6363d59a9f90c264a5f
https://doi.org/10.1002/jhet.5570370416
https://doi.org/10.1002/jhet.5570370416
Publikováno v:
Journal of Heterocyclic Chemistry. 36:1077-1080
X-ray analysis of a crystalline product obtained by treatment of 5-ethylthieno[2,3-b]pyridine with excess acidified hypochlorite establishes its stereochemistry as trans-2,3-dichloro-5-ethyl-2,3-dihydrothieno-[2,3-b]pyridine syn-1-oxide (5), wherein
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcbe84b55d4055b6e03a0dde5196bf75
https://doi.org/10.1002/jhet.5570360440
https://doi.org/10.1002/jhet.5570360440
Publikováno v:
Journal of Heterocyclic Chemistry. 35:1269-1273
Products formed from dehydrative cyclization of cyclopentanone, cyclohexanone, and cycloheptanone with anthranilamide (2) under neutral or acidic conditions are established as the spiro compounds 2,2-polymethylene-1,2,3,4-tetrahydroquinazolin-4-ones
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::138b56cae740d61b0de5880d994dda73
https://doi.org/10.1002/jhet.5570350605
https://doi.org/10.1002/jhet.5570350605
Publikováno v:
The Journal of Organic Chemistry. 63:6503-6510
The charge-transfer spectra of 1:1 molecular complexes of seven 1-alkyl-1-(2-naphthyl)ethenes (where R = alkyl group: H, Me, Et, n-Pr, i-Pr, t-Bu, Neopent) and 1-vinylnaphthalene with TCNE were determined in ClCH2CH2Cl as solvent at 27.1 °C. Equilib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dba47673447839ebe669d47d524f2d97
https://doi.org/10.1021/jo9804902
https://doi.org/10.1021/jo9804902
Autor:
Milton Orchin, LeRoy H. Klemm
Publikováno v:
International Journal of Chemical Kinetics. 29:473-481
The reaction of HCo(CO)4 (HT) or DCo(CO)4 (DT) with excess cinnamaldehyde (CA) in methylcyclohexane (RH) at 22.2° and under 1 atm of CO follows pseudo-first-order kinetics in HT or DT with an inverse isotopic effect of 0.54. Identified products of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::968c517f0046322a1100fb79ddb390a2
https://doi.org/10.1002/(sici)1097-4601(1997)29:7<473::aid-kin1>3.0.co
https://doi.org/10.1002/(sici)1097-4601(1997)29:7<473::aid-kin1>3.0.co