- Systemes de Strecker et apparentes XV. Comportement d'α-alcoylaminonitriles en presence de CS2 et de CO2
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Dans le cadre de l'etude de la reaction de Bucherer-Bergs (transformation, en solution aqueuse, d'un compose carbonyle en acide α-amine correspondant via l'α-aminonitrile puis l'imidazolidinedione-2,4) le comportement d'α-alcoylaminonitriles en presence de CS2 est examine et elargi au systeme α-alcoylaminonitriles/CO2 en solution aqueuse.En presence de CS2, l'α-aminonitrile conduit a la formation equilibree d'imino-5 thiazolidine thione-2.Son evolution ulterieure vers l'imidazolidine dithione-2,4 alcoyle-1 est bloquee par la substitution sur l'azote 3.Par contre, nous avons mis en evidence la formation inattendue de l'imidazolidine dithione-2,4 non substituee.En solution aqueuse et en presence de CO2, l'imino-5 oxazolidinone-2 que nous n'avons pas decelee doit etre en equilibre tres defavorise avec l'α-carboxyaminonitrile.Les seules reactions observees sont l'hydratation autocatalitique de l'α-aminonitrile et sa decomposition en hydroxy-2 propionitrile et en α-aminodinitrile.
- Rousset, A.,Lasperas, M.,Taillades, J.,Commeyras, A.
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p. 209 - 216
(2007/10/02)
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- Comparative radioprotective activity of various pentagonal compounds with two heteroatomes
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Various heterocyclic compounds with two heteroatomes were synthesized and their potential radioprotective activity was tested. This study shows the interest of phenylthiazolidines derivatives in chemical radioprotection.
- Robbe,Fernandez,Dubief,et al.
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p. 235 - 243
(2007/10/02)
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- The reaction between carbon disulfide and some α-methylaminonitriles. The supposed isomerism of 4,4-dialkyl-5-imino-3-methylthiazolidine-2-thiones
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The reaction of carbon disulfide with α-methylaminonitriles 1 yields 5-iminothiazolidine-2-thiones 3, which on prolonged reaction are converted to 5-methyliminothiazolidine-2-thiones 5 and 2,4-dithiohydantoins 9.A mechanism for this apparent methyl transfer is advanced.The yellow compounds obtained by prolonged reaction of the aminonitriles 1 (R1 = R2 = Me and R1 = Et, R2 = Me) are not isomers of the imines 3 (R1 = R2 = Me and R1 = Et, R2 = Me), but 2:1 complexes of these imines with the corresponding 2,4-dithiohydantoins 9 (R1 = R2 = Me and R1 = Et, R2 = Me).
- Chubb, Francis L.,Edward, John T.
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p. 2724 - 2728
(2007/10/02)
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- 1,3-Diaminomethyl-hydantoin additives for lubricating oils
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Lubricating oil compositions, comprising as additive, from 0.001 to 10% by weight, based on the weight of the total composition, of a 1- or 3-aminomethyl-hydantoin or a 1,3-diaminomethyl-hydantoin.
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