Výsledky vyhledávání - "H. E. Wijers"

Chemistry of acetylenic ethers 70: Preparation of 1-alkynyl thioethers and 1-alkynyl selenoethers from sodium alkynylides, sulphur or selenium and alkyl halides

Autor: C. Jonker, Lambert Brandsma, H. E. Wijers

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 83:208-216

A number of 1-alkynyl thioethers and selenoethers RCC-XR′ (XS or Se) have been prepared by reaction of sodium alkynylides, dissolved in liquid ammonia, with sulphur or selenium, followed by alkylation. 1,3-Enynyl thioethers, RCHCH-C≡C-SR′, ω,�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::637ebe3aed8fe4ebe2bb4940a66aacd1
https://doi.org/10.1002/recl.19640830215

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Chemistry of acetylenic ethers, 67: Allenyl thioethers from alkynyl thioethers

Autor: H. E. Wijers, J. F. Arens, Lambert Brandsma

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 82:1040-1046

The isomeric allenyl thioethers, III, are produced in good yield by treating 1-ethylthio-1-alkynes, I, with an equivalent amount of sodamide in liquid ammonia, followed by hydrolysis of the reaction mixture. The corresponding allenyl thioethers alkyl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::821f76b7fc99627c9cffcb4e275f821b
https://doi.org/10.1002/recl.19630821013

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Synthesis and some properties of 1-alkenyl alkyl disulfides and di(1-alkenyl) disulfides

Autor: A. Van Der Gen, H. Boelens, H. E. Wijers, Lambert Brandsma

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 88:519-529

The synthesis of 1-alkenyl alkyl disulfides, R-CH=CH-S-S-R′, and di(l-alkenyl) disulfides, R-CH=CH-S-S-CH=CH-R, with R = H or alkyl and R′ = alkyl, is reported. Reaction of 1-alkenethiolates R-CH=CH-SLi(Na), prepared in situ by cleavage of 1-alke

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bba456804615aba17dc08aceea74c927
https://doi.org/10.1002/recl.19690880503

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A simple laboratory scale preparative method for dialkyl sulphides, selenides, tellurides, thiols and selenols

Autor: L. Brandsma, H. E. Wijers

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 82:68-74

The preparation of dialkyl sulphides, selenides and tellurides by alkylating sodium sulphide, selenide or telluride, obtained from sodium and sulphur, selenium or tellurium in liquid ammonia, is very easily carried out and gives good yields. It is al

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49cf80cc94c36d601414a7489a03023a
https://doi.org/10.1002/recl.19630820108

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Acetylenic thiolesters as a source of thioketenes

Autor: C. H. D. van Ginkel, Lambert Brandsma, H. E. Wijers, J. F. Arens

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 86:907-912

1-Acetylthio-1-hexyne, , is cleaved by nucleophilic reagents. With primary and secondary amines, RR′NH (R = alkyl or aryl, R′ H or alkyl), N-substituted acetamides CH3CONRR′ and N-substituted thioamides C4H9CH2C(S)NRR′ are produced in good yi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfb8ed7bb5d0259c3c1ef7cc041a4b06
https://doi.org/10.1002/recl.19670860814

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Chemistry of acetylenic ethers 80 1-acylthio-1-alkynes, a new class of compounds

Autor: Lambert Brandsma, J. F. Arens, P. P. Montijn, H. E. Wijers

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 84:1284-1288

1-Acylthio-1-alkynes (R and R′ are alkyl) have been prepared in satisfactory yields from ethereal suspensions or solutions of alkynyllithium R′CLi, sulfur powder, and acyl bromides . Addition of water at 60-70° to proceeds smoothly with formatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66850a661fe05afc21dae5ef4346f4a8
https://doi.org/10.1002/recl.19650841009

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Preparation and thermal decomposition of 5-pentyl-1,2,3,4-thiatriazole

Autor: H. E. Wijers, Lambert Brandsma, J. F. Arens

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 86:670-672

The unstable 5-pentyl-1,2,3,4-thiatriazole (IV) has been prepared from acetylthiohexyne (I) and ammonium azide in dimethyl sulfoxide. Thermal decomposition of IV in polar solvents gives pentyl cyanide, sulfur and nitrogen, whereas in non-polar solven

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d497f4a8943e603323d9bc041f2d4d2
https://doi.org/10.1002/recl.19670860612

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