936-77-6Relevant articles and documents
Stereoselective synthesis of tetrasubstituted 2,3-dihydrofurans by one-step cyclization of β-ketosulfides of benzothiazole and aldehydes in ionic liquids
Calo, Vincenzo,Scordari, Fernando,Nacci, Angelo,Schingaro, Emanuela,D'Accolti, Lucia,Monopoli, Antonio
, p. 4406 - 4409 (2003)
A stereoselective synthesis of tetrasubstituted 2,3-dihydrofurans was carried out in n-butylpyridinium tetrafluoroborate ([bpy+][BF4-]) as solvent. The reaction proceeds smoothly in one step starting from simple materials
Complex Eliminations and Solvolyses of N-Acyl-1,5-benzothiazepin-4-ones
Kaupp, Gerd,Matthies, Doris
, p. 1741 - 1746 (2007/10/02)
The heterocyclic bisacylamines 2a-d are solvolyzed to give the 3-propionic acid derivatives 4, 5, and 6 or the heterocycle 1, which may be transformed into 5 by treating 1 with methanol and acids.The pyrolysis of 2 gives 1 by deacylation, the benzothiazoles 7 by elimination and the heterostilbene 9 by elimination.Solvent effects and reaction mechanisms are studied and discussed also in terms of suitable classifications.
Pyrolyses of o-Alkoxy- and o-Alkylthio-N-Allylanilines and of Some Related O- and S-Allyl Compounds
Cadogan, J. I. G.,Hickson, Clare L.,McNab, Hamish
, p. 1885 - 1890 (2007/10/02)
The o-substituted allyl compounds (1)-(12) have been pyrolysed in order to generate aminyl, phenoxyl, and thiophenoxyl radicals with adjacent substituents.In all cases, products are formed by intramolecular hydrogen transfer from the substituent to the radical centre.This process may be followed by rearrangement to give an aldehyde, by heteroatom extrusion to give an alkene, or by ring formation to give five-membered ring heterocycles (Scheme 1, routes A, B1, and B2 respectively.The distribution of products formed by each route is dependent both on the nature of the o-substituent, and on the nature of the initial radical.
