منابع مشابه
Microwave-Assisted Improved Synthesis of Oxazolidin-2-ones, Oxazolidine-2-thiones and Thiazolidine-2-thione Chiral Auxiliaries
A microwave assisted method for the synthesis of some typical 4-substituted oxazolidinone chiral auxiliaries used in asymmetric synthesis is reported in this work. Under these conditions, treatment of (S)-phenylalaninol, (S)-phenylglycinol, (S)-valinol and (1S, 2R)-norephedrine with ethyl carbonate or carbon disulfide under the appropriate and specific microwave reaction conditions, led to an e...
متن کاملSynthesis of benzoxazole-2-ones, benzothiazole-2-ones and their 2-thione derivatives: Efficient conversion of 2-thione to 2-oxo derivatives
A highly practical procedure for preparing benzoxazole-2-ones, benzothiazole-2-ones and its 2-thione derivatives using ethylchloroformate and carbon disulfide and the corresponding aminophenols and aminothiophenols as the starting materials in one-pot protocol is presented. The yields vary from good to excellent, the conditions are mild, and the use of toxic and harmful chemicals is avoided. An...
متن کاملExperimental and theoretical study of the structures and enthalpies of formation of the synthetic reagents 1,3-thiazolidine-2-thione and 1,3-oxazolidine-2-thione.
This paper reports an experimental and a theoretical study of the structures and standard (p(o) = 0.1 MPa) molar enthalpies of formation of the synthetic reagents 1,3-thiazolidine-2-thione [CAS 96-53-7] and 1,3-oxazolidine-2-thione [CAS 5840-81-3]. The enthalpies of combustion and sublimation were measured by rotary bomb combustion calorimetry, and the Knudsen effusion technique and gas-phase e...
متن کاملPreparation and Structure Studies of Thiazolidine and Bisthiazolidine Derivatives
In this work we propose the synthesis of thiazolidine and bisthiazolidine derivatives, and the structure of these compounds were studied using elemental analysis, IR, H-NMR and C-NMR spectroscopy. Tautomeric properties and conformations were investigated by semi-empirical AM1, MNDO and PM3, and ab initio calculations to illustrate the conformational analysis. All calculations lead to the same r...
متن کاملMicrowave-assisted synthesis and evaluation of N-substituted thiazolidine-2, 4-dione derivatives as antimicrobial agents
A series of N-substituted thiazolidine-2,4-dione derivatives bearing potentially bioactive substituents were synthesized by microwave irradiation method. Structural elucidation was accomplished by 1H NMR, 13C NMR, IR, Mass and elemental analyses. The synthesized compounds were evaluated for antimicrobial activities. Among the compounds studied, compounds 4i and 4d showed potent antimicrobial ac...
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ژورنال
عنوان ژورنال: YAKUGAKU ZASSHI
سال: 1955
ISSN: 0031-6903,1347-5231
DOI: 10.1248/yakushi1947.75.11_1421