- Easy access to new heterocyclic systems: 1,4-Oxazine and substituted 1,4-oxazines
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(Chemical Equation Presented) In the course of our investigations on the synthesis of new nitrogen heterocyclic derivatives, we were interested in the synthesis and study of new 1,4-oxazine rings. To this aim, the desired bisvinylphosphate was prepared fr
- Claveau, Elise,Gillaizeau, Isabelle,Blu, Jerome,Bruel, Amelie,Coudert, Gerard
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p. 4832 - 4836
(2008/02/05)
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- Synthesis and pyrolysis of tetrahydro-1,4-oxazine-3,5-diones and tetrahydro-1,4-thiazine-3,5-diones
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The preparation and characterization of six 4-substituted tetrahydro-l,4-oxazine-3,5-diones and five 4-substituted tetrahydro-l,4-thiazine-3,5-diones is described. Upon flash vacuum pyrolysis at 700°C these give N-substituted acetamides and nitriles, and a mechanism for formation of these products is proposed.
- Aitken,Farrell,Kirton
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p. 1526 - 1531
(2007/10/03)
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- Preparation of 2-(2-cyanoethyl)sulfanyl-1H-isoindole-1,3-(2H)-dione and related sulfur-transfer agents
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The title compound 3 and 4-[(2-cyanoethyl)sulfanyl]morpholine-3,5-dione 12 are both conveniently prepared in good yield from 2-cyanoethyl disulfide, which itself is readily prepared in one step from S-(2-cyanoethyl)isothiouronium chloride 4. In the same way, dimethyl and diphenyl disulfides are converted, into 2-methylsulfanyl- and 2-phenylsulfanyl-1H-isoindole-1,3-(2H)-diones 8a and 8b, respectively, also in good yields.
- Klose, Jana,Reese, Colin B.,Song, Quanlai
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p. 14411 - 14416
(2007/10/03)
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- CYCLISATIONS OF 1,3-THIAZINE-2,4-DIONES AND RELATED SYSTEMS
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Thiazinediones 10 and 11 serve as starting materals for intramolecular amidoalkylations.While the stability of the derived hydroxy lactams 14 and 15 is lower as compared to carbocyclic analogs the ring closures to the bicyclic systems indicate a common order of reactivity of the corresponding N-acyliminium intermediate, e.g. 26.
- Vliet, P. N. W. Van Der,Hamersma, J. A. M.,Speckamp, W. N.
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p. 2007 - 2014
(2007/10/02)
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