1
|
Saeedi M, Goli F, Mahdavi M, Sarihi P, Asadipour A, Shafiee A, Foroumadi A. An Efficient Synthesis of Novel Dihydrothiazol-2-yl-amides via Cyclisation of Propargylic Carbamothioyl-amides. JOURNAL OF CHEMICAL RESEARCH 2014. [DOI: 10.3184/174751914x13899480812215] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An efficient protocol is described for the versatile synthesis of novel dihydrothiazol-2-yl-amide derivatives via the regioselective 5-exo-dig heterocyclisation of N-propargyl carbamothioyl-amides in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) in refluxing ethanol. All products were obtained in good yields and short reaction time (10–30 min).
Collapse
Affiliation(s)
- Mina Saeedi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medicinal Sciences, Tehran 14176, Iran
| | - Fereshteh Goli
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medicinal Sciences, Tehran 14176, Iran
| | - Mohammad Mahdavi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medicinal Sciences, Tehran 14176, Iran
| | - Pouria Sarihi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medicinal Sciences, Tehran 14176, Iran
| | - Ali Asadipour
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medicinal Sciences, Kerman, Iran
| | - Abbas Shafiee
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medicinal Sciences, Tehran 14176, Iran
| | - Alireza Foroumadi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medicinal Sciences, Tehran 14176, Iran
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medicinal Sciences, Kerman, Iran
| |
Collapse
|
2
|
|
3
|
Trofimova TP, Pushin AN, Proshin AN, Stash AI, Mandrugin AA, Fedoseev VM, Proskuryakov SY. Synthesis of new 2-amino-5-hydroxymethyl-2-thiazolines. Chem Heterocycl Compd (N Y) 2007. [DOI: 10.1007/s10593-007-0054-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
4
|
|
5
|
K. Tandon V, A. Singh K, Rai S, M. van Leusen A. Synthesis and Reactions of N-o-Anisylsulfonylmethyl- and N-o-sec-Butoxysulfonylmethylcarbodiimides with Aldehydes. HETEROCYCLES 2004. [DOI: 10.3987/com-04-s(p)32] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
6
|
Ellames GJ, Gibson JS, Herbert JM, McNeill AH. The scope and limitations of deuteration mediated by Crabtree's catalyst. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00945-0] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
7
|
Elliott MC, Kruiswijk E, Long MS. Annulation reactions of azoles and azolines with heterocumulenes. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00442-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
8
|
Avalos M, Babiano R, Cintas P, Chavero MM, Higes FJ, Jiménez JL, Palacios JC, Silvero G. Reactions of 2-amino-2-thiazolines with isocyanates and isothiocyanates. Chemical and computational studies on the regioselectivity, adduct rearrangement, and mechanistic pathways. J Org Chem 2000; 65:8882-92. [PMID: 11149829 DOI: 10.1021/jo000618r] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
2-Amino-2-thiazoline derivatives bearing alkyl or aryl substituents at exocyclic nitrogen have been condensed with different isocyanates and isothiocyanates. The addition occurs at ring endocyclic nitrogen in a regiospecific manner to afford kinetic and enthalpy-favored adducts. The unequivocal assignment of these structures has been confirmed by X-ray diffraction analyses of several compounds. The endo adducts do not rearrange on heating with the sole exception of adducts in which the exocyclic nitrogen remains unsubstituted. Trapping experiments in the presence of other isocyanates or isothiocyanates produce the formation of new endo adducts by acyl exchange in the reaction mixture. Semiempirical PM3 calculations full corroborate the higher stability of endo or exo adducts depending on the substitution pattern. The formation of adducts is compatible with a stepwise reaction mechanism, for which semiempirical transition structures could be located in the potential energy surface, and the global energetics of the process have been determined. The formation of the endo adducts proceeds with a smaller activation barrier.
Collapse
Affiliation(s)
- M Avalos
- Departamentos de Química Orgánica y Química Inorgánica, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Chaimbault C, Bosc JJ, Leger JM, Negrier P, Capelle F, Jarry C. Physicochemical and crystallographic evidence for polymorphism of the racemic ethyl (2-chloromethyl-2,3-dihydro-5H-oxazolo [3, 2-a]pyrimidin-5-one)-6-carboxylate. J Pharm Sci 2000; 89:1496-504. [PMID: 11015694 DOI: 10.1002/1520-6017(200011)89:11<1496::aid-jps12>3.0.co;2-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The various crystalline forms of an original bicyclic compound [ethyl (2-chloromethyl-2,3-dihydro-5H-oxazolo[3, 2-a]pyrimidin-5-one)-6-carboxylate); EOC] have been obtained and characterized by powder and single-crystal X-ray diffraction, differential scanning calorimetry (DSC), and infrared (IR) and Raman spectroscopy. At 4 degrees C in methanol, a monoclinic racemate (form II) crystallized from the racemic mixture, whereas at 20 degrees C, an orthorhombic racemate (form I) was isolated in trichloroethylene. By increasing the temperature, a solid-solid transition from the stable form II to the stable form I was observed with a Guinier-Simon camera. A I --> II transformation was observed at ambient temperature by DSC.
Collapse
Affiliation(s)
- C Chaimbault
- Laboratoire de Chimie Physique et Minérale, Université Bordeaux II, 146 rue Léo Saignat, 33076 - Bordeaux, France
| | | | | | | | | | | |
Collapse
|
10
|
Sakae M, Katsurada M, Watanabe M, Yoneda F, Nishigaki S, Ishida T. Study on the structures of 2-substituted iminothiazolidine derivatives. J Heterocycl Chem 1997. [DOI: 10.1002/jhet.5570340125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
11
|
Creeke PI, Mellor JM. Synthessi and elaboration of heterocycles via iodocyclisation of unsaturated thioureas. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(00)99382-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
12
|
Electrophilic heterocyclization of unsaturated sulfur and phosphorus compounds (review). Chem Heterocycl Compd (N Y) 1986. [DOI: 10.1007/bf00514985] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
13
|
Webb RL, Labaw CS. Diphenyl cyanocarbonimidate. A versatile synthon for the construction of heterocyclic systems. J Heterocycl Chem 1982. [DOI: 10.1002/jhet.5570190543] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
14
|
Kampe KD. Synthesen mit 2-Amino-2-oxazolinen, I. Reaktionen von 2-Amino-2-oxazolinen mit α, β-ungesättigten Estern. ACTA ACUST UNITED AC 1974. [DOI: 10.1002/jlac.197419740405] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
15
|
Klayman DL, Maul JJ, Milne GWA. 2-Amino-2-thiazoline. V. phenylthioureido and phenylureido derivatives of 2-thiazoline. J Heterocycl Chem 1968. [DOI: 10.1002/jhet.5570050413] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
16
|
Beyer H, Schilling H. Über die Reaktivität des Cyanharnstoffs mit α-Halogenketonen. ACTA ACUST UNITED AC 1966. [DOI: 10.1002/cber.19660990707] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
17
|
Behringer H, Kuchinka K. Thiolsäuren, IV. über die Reaktion von 2-Amino-thiazolinen mit Thioessigsäure. ACTA ACUST UNITED AC 1961. [DOI: 10.1002/jlac.19616500114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
18
|
Dorn H, Hilgetag G, Rieche A. Konstitution und Bildung der Arylsulfonyl-Derivate von Aminoheterocyclen. Angew Chem Int Ed Engl 1961. [DOI: 10.1002/ange.19610731603] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
19
|
|
20
|
Schöberl A, Kawohl M, Hansen G. Über die Cyanidspaltung von Homocysteamin und über das 2-Amino-penthiazolin. ACTA ACUST UNITED AC 1958. [DOI: 10.1002/jlac.19586140109] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
21
|
Die Umsetzung von Cystin und Cystamin mit Kaliumcyanid, ein neuer Weg in die Thiazolinchemie. ACTA ACUST UNITED AC 1951. [DOI: 10.1002/cber.19510840702] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
22
|
Hückel W, Gelmroth W. Die Fortschritte in der organischen Chemie 1929–1931. I. Allgemeiner und physikalisch-chemischer Teil. Angew Chem Int Ed Engl 1932. [DOI: 10.1002/ange.19320452802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|