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pro vyhledávání: '"C. JONGSMA"'
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Autor:
C. Jongsma, F.M. Bickelhaupt
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 92:1143-1151
The reaction of 2-bromobenzophenone (1) with methyl, ethyl, and phenyl Grignard reagents was found to involve substantial substitution of bromine by the organic group of the Grignard reagent It is shown that substitution occurs by intramolecular nucl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e3fc4505d44a4499428356e087abd2b
https://doi.org/10.1002/recl.19730921012
https://doi.org/10.1002/recl.19730921012
Autor:
A C, Jongsma
Publikováno v:
Nederlands tijdschrift voor tandheelkunde. 118(7-8)
A few decades ago, relatively little was known concerning the pre-eruptive spatial development of permanent molars. The material that formed the basis for this study consisted of 114 dry human mandibles of young children and adolescents. Measurements
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::b3ba2ef918fc7c9a1658962cc1532309
https://pubmed.ncbi.nlm.nih.gov/21882509
https://pubmed.ncbi.nlm.nih.gov/21882509
Publikováno v:
Tetrahedron Letters. 17:481-484
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fef6381cd3d9a0499f980e192d02e73
https://doi.org/10.1016/s0040-4039(00)77888-9
https://doi.org/10.1016/s0040-4039(00)77888-9
Publikováno v:
Tetrahedron Letters. 16:199-202
Aus der Arsinsaure (I) erhalt man bei der Behandlung mit Thionylhalogeniden die 5,10-Dihalogeno-5,10-dihydro-arsaanthracene (II), die mit Methanol zu den Methoxy- Verbindungen (III) austauschen.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b23a185d38d18250edfee37af004f768
https://doi.org/10.1016/s0040-4039(00)71821-1
https://doi.org/10.1016/s0040-4039(00)71821-1
Publikováno v:
Tetrahedron. 31:2931-2935
The synthesis of 10-methyl-9-phosphaanthracene (1b) is described. Its stability is found to be intermediate between that of the unsubstituted parent compound (1a) and of the 10-phenyl derivative (1c). The electronic structure of this new phosphaaroma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1eef1be9fb24739deef76ea386cab347
https://doi.org/10.1016/0040-4020(75)80313-9
https://doi.org/10.1016/0040-4020(75)80313-9
Publikováno v:
Tetrahedron. 32:121-124
1,4-Migration of a phenyl group has been observed when 9-phenyl-10-t-butyl-9,10-dihydro-9-phospha-anthracene 7 was subjected to pyrolysis at 500° or to electron-impact. The reaction is proposed to occur via 1-phosphabicyclo[2.2.1]heptyl-type species
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1251fe07e9ccd33059842cf0a2faf01
https://doi.org/10.1016/0040-4020(76)80031-2
https://doi.org/10.1016/0040-4020(76)80031-2
Autor:
F.M. Bickelhaupt, P. de Koe, R.J.M. Weustink, Hans Vermeer, R. Lourens, N.R. Mast, G. L. van Mourik, C. Jongsma
Publikováno v:
Tetrahedron. 32:1921-1930
In the diphenylmethane series, the synthesis of 2,2′ - diiododiphenylmethane ( 4g ) and the improved synthesis of 2,2′ - dibromodiphenylmethane ( 4e ) are reported. The triphenylmethane derivatives, 2-bromo-, 2-iodo-, 2,2′-dichloro-, 2,2′-dib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fbc247668a1119403816c55e467ae3a
https://doi.org/10.1016/0040-4020(76)85198-8
https://doi.org/10.1016/0040-4020(76)85198-8
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 96:265-270
10-Aryl-9-arsaanthracenes (3b,c,d) were conveniently synthesized by flash vacuum pyrolysis at ∼ 500° of 10-mono- and di-substituted 9-aryl-9,10-dihydro-9-arsaanthracenes (11a-f). The yield of 10-aryl-9-arsaanthracenes is found to depend upon the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a84d4747b2692ad0c370d806f8790be
https://doi.org/10.1002/recl.19770961007
https://doi.org/10.1002/recl.19770961007
Publikováno v:
Tetrahedron. 33:205-209
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2030ce1891694ba237d7cd3ffdc46c30
https://doi.org/10.1016/0040-4020(77)80127-0
https://doi.org/10.1016/0040-4020(77)80127-0