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Synthesis of sulfur-containing heterocycles via ring enlargement
BF Abdel-Wahab, S Shaaban, GA El-Hiti - Molecular Diversity, 2018 - Springer
The current review deals with the use of ring expansion reactions for the synthesis of sulfur-
containing heterocycles. Ring enlargement offers by far a convenient method for the …
containing heterocycles. Ring enlargement offers by far a convenient method for the …
NBS-Promoted Synthesis of Thiocyanated Aminomaleimides and Site-Selective Intramolecular Cyclization Access to 1, 4-Benzothiazepines via S–CN Bond Cleavage
Q Yang, S Huang, L Yin, Z Wang, X Chen… - The Journal of Organic …, 2024 - ACS Publications
A transition metal-free concise and efficient protocol for the synthesis of thiocyanated
aminomaleimides and benzo [e][1, 4] thiazepine derivatives has been developed. The …
aminomaleimides and benzo [e][1, 4] thiazepine derivatives has been developed. The …
Synthesis of novel [3, 1]-benzothiazepine and [3, 1]-benzoxazepine derivatives with antitumoral activity
WR Martínez, GCG Militao, TG da Silva, RO Silva… - RSC Advances, 2014 - pubs.rsc.org
A new method for the synthesis of [3, 1]-benzothiazepines and [3, 1]-benzoxazepines from
the reaction of C-allylanilines and isothiocyanates or isocyanates without the need for the …
the reaction of C-allylanilines and isothiocyanates or isocyanates without the need for the …
Expected and unexpected reactions of 1, 3-benzothiazine derivatives, I. Ring transformation of β-lactam-condensed 1, 3-benzothiazines into 4, 5-dihydro-1, 4 …
L Fodor, P Csomós, T Holczbauer, A Kálmán… - Tetrahedron …, 2011 - Elsevier
The ring-enlargement reactions of monochloro-β-lactam-fused 2-aryl-1, 3-benzothiazines
revealed that the reactions of ortho-nitro aryl-substituted derivatives with sodium methoxide …
revealed that the reactions of ortho-nitro aryl-substituted derivatives with sodium methoxide …
Synthesis of 1, 3-thiazines by a three-component reaction and their transformations into β-lactam-condensed 1, 3-thiazine and 1, 4-thiazepine derivatives
F Peudru, JF Lohier, M Gulea… - Phosphorus, Sulfur, and …, 2016 - Taylor & Francis
ABSTRACT Variously substituted 1, 3-thiazines have been prepared by a three-component
reaction involving a thioamide, an aldehyde, and an alkene. Two diastereomeric thiazines …
reaction involving a thioamide, an aldehyde, and an alkene. Two diastereomeric thiazines …
Expeditious synthesis of novel β-Lactam-substituted polycyclic fused chromeno pyrrole derivatives from mbh carbonates by intramolecular [3+ 2]-cycloaddition …
R Rajesh, R Raghunathan - Synlett, 2013 - thieme-connect.com
A facile synthesis of tri-and tetracyclic fused chromeno pyrrole derivatives has been
accomplished by intramolecular cycloaddition reaction of azomethine ylides generated from …
accomplished by intramolecular cycloaddition reaction of azomethine ylides generated from …
Novel indole syntheses by ring transformation of β-lactam-condensed 1, 3-benzothiazines into indolo [2, 3-b][1, 4] benzothiazepines and indolo [3, 2-c] isoquinolines
ortho-Nitrophenyl-substituted condensed 1, 3-benzothiazines proved to be a useful core unit
in indole syntheses under non-reductive conditions. Thus, the treatment of ortho-nitro-2-aryl …
in indole syntheses under non-reductive conditions. Thus, the treatment of ortho-nitro-2-aryl …
Stereoselective synthesis of novel monocyclic trans-3-halogenated-4-pyrazolyl-β-lactams: Potential synthons and promising biologically active agents
Stereoselective synthesis of novel monocyclic trans-3-halogenated-4-pyrazolyl-β-lactams 5
is described. The reaction of ketene derived from α-bromo/chloroethanoic acids 4 using …
is described. The reaction of ketene derived from α-bromo/chloroethanoic acids 4 using …
Expected and unexpected reactions of 1, 3-benzothiazine derivatives, II. Formation of isomeric 5, 6-dihydro-1, 5-benzothiazocines
A method for the synthesis of medium-sized 1, 5-benzothiazocines by ring enlargement of 1,
3-benzothiazines has been developed. When N-alkyl-1, 3-benzothiazines were reacted with …
3-benzothiazines has been developed. When N-alkyl-1, 3-benzothiazines were reacted with …
Ring transformations of β-lactam-condensed 1, 3-benzothiazines to isoquinoline and thiazole derivatives by sulfur extrusion and addition sequences
The ring transformations of dichloro-β-lactam-fused 2-aryl-1, 3-benzothiazines with sodium
methoxide were investigated. With 2 equiv of base, the dichloro-β-lactam derivatives …
methoxide were investigated. With 2 equiv of base, the dichloro-β-lactam derivatives …