Tetrahedron Letters

Poly (ethylene glycol)(PEG) as an efficient and recyclable reaction medium for the synthesis of dibenz [b, f]-1, 4-oxazepine

YR Jorapur, G Rajagopal, PJ Saikia, RR Pal

Index: Jorapur, Yogesh R.; Rajagopal, Gurusamy; Saikia, Prakash J.; Pal, Ravindra R. Tetrahedron Letters, 2008 , vol. 49, # 9 p. 1495 - 1497

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Citation Number: 28

Abstract

Poly (ethylene glycol)(PEG) has been used as a sustainable, non-volatile, and environmentally friendly reaction solvent for the synthesis of dibenz [b, f]-1, 4-oxazepine (2a). PEG-400 as a promoter provided 89% of 2a within 8h. We compared the reactivity of PEG-400 with 18-crown-6, tetra-n-butylammonium bromide and ionic liquids as phase transfer catalysts. Further, we investigated our protocol with various PEGs, with molecular ...

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