Zobrazeno 1 - 10
of 210
pro vyhledávání: '"J F, Arens"'
Autor:
D. A. van Dorp, J. F. Arens
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 65:338-345
By dehydration and subsequent saponification of the reaction product obtained from β-ionone and γ-bromocrotonic ester we prepared β-ionylidene crotonic acid III, which substance was transformed into the “C18 ketone” IV by means of lithium meth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::984bb6c91386855e5163397d89bd4920
https://doi.org/10.1002/recl.19460650505
https://doi.org/10.1002/recl.19460650505
Autor:
J. F. Arens, D. A. van Dorp
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 66:759-762
A by-product of the Reformatzky-reaction of β-ionone and ethyl γ-bromocrotonate is a cis-β-ionylidene-crotonic acid I. This acid can easily be converted into the cis-C18-ketone by means of lithiummethyl.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ca2008790f0bb88cb07a3caae405acf
https://doi.org/10.1002/recl.19470661207
https://doi.org/10.1002/recl.19470661207
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 84:271-284
Ethers with the systems , CH3CCCH(OR)2, CH3CCCH(OR)3 or -CH2-CH2-CCOR undergo an elimination of ROH [R = alkyl, 2-alkynyl (-CH2CC-R′) phenyl, or 2-tetrahydropyranyl] with formation of 1,3-enyne derivatives, , on treatment with alkali amides in liqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63286789284bb83771e1c403475b875f
https://doi.org/10.1002/recl.19650840302
https://doi.org/10.1002/recl.19650840302
Autor:
J. F. Arens, J. C. W. Postma
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 75:1385-1396
The reaction of aldehydes with ethoxyethynylmagnesium bromide does not yield the expected secondary carbinols. In the case of aromatic aldehydes the reaction products are formed from two molecules of the aldehyde and one molecule of the acetylenic co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d7e9e7b2cb9946efb32af5097235bbb
https://doi.org/10.1002/recl.19560751205
https://doi.org/10.1002/recl.19560751205
Autor:
J. F. Arens, H. J. T. Bos
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 82:845-858
α,β-Unsaturated ketones are formed by reaction of aldehydes and ketones with phenylethyne under the influence of boron trifluoride. When using aromatic aldehydes 2,4,6-triarylpyrylium tetrafluoroborates are formed as by-products. trans-2,3-Diphenyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::437f85827e6ea739ecad8340120c1fa6
https://doi.org/10.1002/recl.19630820903
https://doi.org/10.1002/recl.19630820903
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 87:193-200
Ethoxyethyne and propoxyethyne are slowly tetramerized to 1,3,5,7-tetra-alkoxycyclo-octatetraenes under the influence of alkali amides in liquid ammonia. By partial hydrolysis 1,3,5,7-tetraethoxycyclo-octatetraene (I) is converted into 3,5,7-triethox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43ccd5cc4e3f8b5e67bfb0e902f8638b
https://doi.org/10.1002/recl.19680870210
https://doi.org/10.1002/recl.19680870210
Autor:
J. F. Arens, G. Vollema
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 78:140-144
The reaction between epichlorohydrin and ethylthioethynyl-lithium affords the enynol V and furfuryl ethyl sulphide VI. The same reaction with ethoxyethynyl-lithium, however, produces the epoxy compound VII.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7062861a08d3c4d95b7f2e28cb651ec
https://doi.org/10.1002/recl.19590780210
https://doi.org/10.1002/recl.19590780210
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 88:1445-1450
Treatment of the carbinols (CH3)2C=C=C=C(OCH3)CR1R2(OH) (I) with potassium tert-butoxide in dimethyl sulfoxide gives derivatives of furan (III) if R2 = H and derivatives of 2,5-dihydrofuran (II) if R1 and R2 are both alkyl or if R1R2C = cyclohexyl. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c2e4424ad2e70747f076928485de228
https://doi.org/10.1002/recl.19690881209
https://doi.org/10.1002/recl.19690881209
Autor:
J. F. Arens, H. M. Schmidt
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 86:1138-1142
It is possible to reduce non-terminal triple bonds in poly-ynes selectively when the terminal triple bonds are previously protected silylation. Desilylation after the reduction can be easily effected with aqueous alcoholic silver nitrate.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e4a1b06dda5256d6074e5df441f8ec1
https://doi.org/10.1002/recl.19670861013
https://doi.org/10.1002/recl.19670861013
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 70:289-296
The preparation of ethyl-β-chlorovinyl ether from the readily available dichloroacetal is reported. Careful fractionation of the product yields the pure cis- and trans-isomers of which only the cis-isomer gives a high yield (76%) of ethoxy-acetylene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db099b36a77e53ce22fbd9c102c77219
https://doi.org/10.1002/recl.19510700403
https://doi.org/10.1002/recl.19510700403