An easy access to diversely fused dioxa-2-aza-tricyclo[n.3.1.02,n]tetra/pentadecanes under solvent-free condition
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Acknowledgments
We thank the Council of Scientific and Industrial Research (CSIR), New Delhi, for financial support in the form of fellowships to R.P., S.M., A.M., K.B.S., S.N., P.S. and A.H. We are indebted to Mr. E. Padmanaban and Mr. K. Sarkar for NMR and mass spectral analysis and also to Dr B. Achari, Emeritus Scientist, CSIR, for critical suggestions and encouragement.
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2012, Progress in Heterocyclic ChemistryCitation Excerpt :A highly enantioselective hydrogenation of dibenzo[b,f][1,4]oxazepines was an efficient route to dihydrodibenzo[b,f][1,4]oxazepines 256 <11CC7845>. Phenyl/N-heterocycle-fused 6,13-dioxa-2-aza-tricyclo[8.3.1.02,8]tetradecanes 257, a new class of bicyclo[3.3.1]nonanes, were prepared from the corresponding fused tricyclic oxaza-quinolinium salts <11TL5516>. Novel tetracyclic indolobenzoxazepine derivative 258 <11BML2925> and heteroaryl-fused analog 259 <11OBC6654> were both inhibitors of the polymerase enzyme (NS5B) of the hepatitis C virus.